./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --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 e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:33:57,357 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:33:57,484 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-21 19:33:57,498 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:33:57,499 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:33:57,540 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:33:57,541 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:33:57,541 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:33:57,542 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:33:57,548 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:33:57,548 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:33:57,549 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:33:57,549 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:33:57,551 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:33:57,551 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:33:57,552 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:33:57,552 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:33:57,553 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:33:57,553 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:33:57,554 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:33:57,554 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:33:57,555 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:33:57,556 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 19:33:57,556 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 19:33:57,557 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:33:57,558 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:33:57,558 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:33:57,558 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:33:57,559 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:33:57,559 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 19:33:57,561 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 19:33:57,561 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 19:33:57,561 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:33:57,562 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 19:33:57,562 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 19:33:57,562 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:33:57,562 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:33:57,563 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:33:57,563 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:33:57,563 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:33:57,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:33:57,564 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:33:57,564 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:33:57,565 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:33:57,565 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:33:57,565 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:33:57,566 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:33:57,566 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:33:57,566 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 [2023-11-21 19:33:57,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:33:57,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:33:57,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:33:57,873 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:33:57,874 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:33:57,876 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-21 19:34:01,038 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:34:01,337 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:34:01,337 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-21 19:34:01,348 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/data/3b9b2a1c9/1631b8a7304d4335a4719e3243fcde87/FLAG2397eee76 [2023-11-21 19:34:01,366 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/data/3b9b2a1c9/1631b8a7304d4335a4719e3243fcde87 [2023-11-21 19:34:01,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:34:01,374 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:34:01,377 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:34:01,377 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:34:01,383 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:34:01,384 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:34:01" (1/1) ... [2023-11-21 19:34:01,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f9ead5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:01, skipping insertion in model container [2023-11-21 19:34:01,385 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:34:01" (1/1) ... [2023-11-21 19:34:01,420 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:34:01,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:34:01,715 ERROR L324 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) [2023-11-21 19:34:01,716 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6597c1b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:01, skipping insertion in model container [2023-11-21 19:34:01,716 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:34:01,717 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-21 19:34:01,719 INFO L158 Benchmark]: Toolchain (without parser) took 344.23ms. Allocated memory is still 163.6MB. Free memory was 119.5MB in the beginning and 109.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-21 19:34:01,719 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 136.3MB. Free memory is still 78.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:34:01,720 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.72ms. Allocated memory is still 163.6MB. Free memory was 118.9MB in the beginning and 109.4MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-21 19:34:01,722 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 136.3MB. Free memory is still 78.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 339.72ms. Allocated memory is still 163.6MB. Free memory was 118.9MB in the beginning and 109.4MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --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 e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:34:04,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:34:04,428 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-21 19:34:04,454 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:34:04,455 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:34:04,485 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:34:04,485 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:34:04,486 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:34:04,487 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:34:04,488 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:34:04,488 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:34:04,489 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:34:04,490 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:34:04,490 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:34:04,491 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:34:04,491 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:34:04,492 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 19:34:04,493 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 19:34:04,494 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:34:04,494 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:34:04,495 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:34:04,496 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:34:04,496 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:34:04,497 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 19:34:04,497 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 19:34:04,498 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 19:34:04,498 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:34:04,499 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 19:34:04,500 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 19:34:04,500 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 19:34:04,501 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 19:34:04,501 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:34:04,501 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:34:04,502 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:34:04,502 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 19:34:04,502 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:34:04,503 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:34:04,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:34:04,504 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:34:04,504 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:34:04,504 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-21 19:34:04,505 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 19:34:04,505 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:34:04,505 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:34:04,506 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:34:04,506 INFO L153 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_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 [2023-11-21 19:34:04,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:34:04,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:34:04,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:34:04,936 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:34:04,937 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:34:04,939 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-21 19:34:08,108 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:34:08,425 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:34:08,425 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-21 19:34:08,436 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/data/f8e3c0290/d59fa03438fe49e5b6c2087c11789a50/FLAG01d3f43e8 [2023-11-21 19:34:08,451 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/data/f8e3c0290/d59fa03438fe49e5b6c2087c11789a50 [2023-11-21 19:34:08,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:34:08,454 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:34:08,455 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:34:08,456 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:34:08,462 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:34:08,462 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:34:08" (1/1) ... [2023-11-21 19:34:08,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@292f165d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08, skipping insertion in model container [2023-11-21 19:34:08,464 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:34:08" (1/1) ... [2023-11-21 19:34:08,493 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:34:08,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:34:08,767 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-21 19:34:08,780 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:34:08,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:34:08,829 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:34:08,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:34:08,887 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:34:08,888 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:34:08,896 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:34:08,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08 WrapperNode [2023-11-21 19:34:08,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:34:08,898 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:34:08,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:34:08,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:34:08,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08" (1/1) ... [2023-11-21 19:34:08,931 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08" (1/1) ... [2023-11-21 19:34:08,973 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 126 [2023-11-21 19:34:08,974 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:34:08,975 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:34:08,976 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:34:08,976 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:34:08,985 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08" (1/1) ... [2023-11-21 19:34:08,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08" (1/1) ... [2023-11-21 19:34:09,007 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08" (1/1) ... [2023-11-21 19:34:09,009 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08" (1/1) ... [2023-11-21 19:34:09,020 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08" (1/1) ... [2023-11-21 19:34:09,024 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08" (1/1) ... [2023-11-21 19:34:09,027 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08" (1/1) ... [2023-11-21 19:34:09,029 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08" (1/1) ... [2023-11-21 19:34:09,053 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:34:09,054 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:34:09,054 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:34:09,055 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:34:09,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08" (1/1) ... [2023-11-21 19:34:09,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:34:09,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:09,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:34:09,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:34:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:34:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 19:34:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:34:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-21 19:34:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-21 19:34:09,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-21 19:34:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-21 19:34:09,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-21 19:34:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-21 19:34:09,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-21 19:34:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 19:34:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 19:34:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:34:09,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:34:09,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:34:09,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:34:09,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-21 19:34:09,153 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 19:34:09,321 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:34:09,326 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:34:09,947 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:34:10,310 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:34:10,310 INFO L308 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-21 19:34:10,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:34:10 BoogieIcfgContainer [2023-11-21 19:34:10,312 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:34:10,317 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:34:10,317 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:34:10,320 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:34:10,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:34:08" (1/3) ... [2023-11-21 19:34:10,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bd1dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:34:10, skipping insertion in model container [2023-11-21 19:34:10,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:08" (2/3) ... [2023-11-21 19:34:10,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bd1dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:34:10, skipping insertion in model container [2023-11-21 19:34:10,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:34:10" (3/3) ... [2023-11-21 19:34:10,325 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-11-21 19:34:10,345 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:34:10,345 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-21 19:34:10,345 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 19:34:10,447 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-21 19:34:10,487 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 79 places, 75 transitions, 171 flow [2023-11-21 19:34:10,784 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3898 states, 3684 states have (on average 3.8911509229098806) internal successors, (14335), 3897 states have internal predecessors, (14335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:10,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:34:10,822 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;@3c84efe5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:34:10,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-11-21 19:34:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 3898 states, 3684 states have (on average 3.8911509229098806) internal successors, (14335), 3897 states have internal predecessors, (14335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:34:10,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:10,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:34:10,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-21 19:34:10,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:10,860 INFO L85 PathProgramCache]: Analyzing trace with hash 509839, now seen corresponding path program 1 times [2023-11-21 19:34:10,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:34:10,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578214034] [2023-11-21 19:34:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:10,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:10,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:34:10,883 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:34:10,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:11,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:34:11,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:11,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 19:34:11,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,160 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:11,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 19:34:11,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,216 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:11,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,226 INFO L378 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-21 19:34:11,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,239 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:11,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 19:34:11,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,285 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:11,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,295 INFO L378 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-21 19:34:11,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,313 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:11,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,332 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:11,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,344 INFO L378 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-21 19:34:11,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,374 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:11,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,383 INFO L378 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-21 19:34:11,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 19:34:11,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,422 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:11,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,432 INFO L378 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-21 19:34:11,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,450 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:11,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,479 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:11,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 19:34:11,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 19:34:11,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,551 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:11,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 19:34:11,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:11,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 19:34:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:11,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:11,636 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:34:11,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578214034] [2023-11-21 19:34:11,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578214034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:11,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:11,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:34:11,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172223721] [2023-11-21 19:34:11,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:11,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:34:11,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:34:11,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:34:11,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:34:11,703 INFO L87 Difference]: Start difference. First operand has 3898 states, 3684 states have (on average 3.8911509229098806) internal successors, (14335), 3897 states have internal predecessors, (14335), 0 states have call successors, (0), 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 1.5) 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) [2023-11-21 19:34:12,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:12,120 INFO L93 Difference]: Finished difference Result 3894 states and 14331 transitions. [2023-11-21 19:34:12,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:12,123 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 [2023-11-21 19:34:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:12,192 INFO L225 Difference]: With dead ends: 3894 [2023-11-21 19:34:12,192 INFO L226 Difference]: Without dead ends: 3894 [2023-11-21 19:34:12,194 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 [2023-11-21 19:34:12,197 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:12,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 49 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:34:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2023-11-21 19:34:12,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 3894. [2023-11-21 19:34:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3894 states, 3683 states have (on average 3.8911213684496335) internal successors, (14331), 3893 states have internal predecessors, (14331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3894 states to 3894 states and 14331 transitions. [2023-11-21 19:34:12,548 INFO L78 Accepts]: Start accepts. Automaton has 3894 states and 14331 transitions. Word has length 3 [2023-11-21 19:34:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:12,549 INFO L495 AbstractCegarLoop]: Abstraction has 3894 states and 14331 transitions. [2023-11-21 19:34:12,549 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) [2023-11-21 19:34:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3894 states and 14331 transitions. [2023-11-21 19:34:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:34:12,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:12,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:34:12,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:12,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:12,757 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-21 19:34:12,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:12,758 INFO L85 PathProgramCache]: Analyzing trace with hash 509840, now seen corresponding path program 1 times [2023-11-21 19:34:12,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:34:12,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779269604] [2023-11-21 19:34:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:12,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:12,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:34:12,768 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:34:12,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:12,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 19:34:12,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:12,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-21 19:34:12,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:12,979 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:13,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,016 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:13,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:13,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,053 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:13,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,071 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:13,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,090 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:13,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,103 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:13,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,120 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:13,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,133 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:13,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:13,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,184 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:13,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,203 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:13,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,216 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:13,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,244 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:13,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,256 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:13,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,272 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:13,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:13,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:13,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,345 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:13,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,368 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:13,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:13,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-21 19:34:13,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:13,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:13,541 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:13,541 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:34:13,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779269604] [2023-11-21 19:34:13,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779269604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:13,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:13,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:34:13,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777102248] [2023-11-21 19:34:13,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:13,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:34:13,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:34:13,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:34:13,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:34:13,545 INFO L87 Difference]: Start difference. First operand 3894 states and 14331 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) [2023-11-21 19:34:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:14,143 INFO L93 Difference]: Finished difference Result 3898 states and 14337 transitions. [2023-11-21 19:34:14,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:34:14,144 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 [2023-11-21 19:34:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:14,268 INFO L225 Difference]: With dead ends: 3898 [2023-11-21 19:34:14,269 INFO L226 Difference]: Without dead ends: 3898 [2023-11-21 19:34:14,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:14,270 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:14,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:34:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2023-11-21 19:34:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 3898. [2023-11-21 19:34:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3898 states, 3687 states have (on average 3.888527257933279) internal successors, (14337), 3897 states have internal predecessors, (14337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3898 states to 3898 states and 14337 transitions. [2023-11-21 19:34:14,545 INFO L78 Accepts]: Start accepts. Automaton has 3898 states and 14337 transitions. Word has length 3 [2023-11-21 19:34:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:14,546 INFO L495 AbstractCegarLoop]: Abstraction has 3898 states and 14337 transitions. [2023-11-21 19:34:14,546 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) [2023-11-21 19:34:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3898 states and 14337 transitions. [2023-11-21 19:34:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-21 19:34:14,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:14,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-21 19:34:14,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:14,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:14,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-21 19:34:14,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:14,750 INFO L85 PathProgramCache]: Analyzing trace with hash 15805991, now seen corresponding path program 1 times [2023-11-21 19:34:14,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:34:14,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003236160] [2023-11-21 19:34:14,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:14,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:14,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:34:14,753 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:34:14,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:14,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-21 19:34:14,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:14,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:14,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:14,975 INFO L349 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-11-21 19:34:14,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 36 [2023-11-21 19:34:15,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:15,160 INFO L349 Elim1Store]: treesize reduction 82, result has 15.5 percent of original size [2023-11-21 19:34:15,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 40 [2023-11-21 19:34:15,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:15,890 INFO L349 Elim1Store]: treesize reduction 148, result has 36.5 percent of original size [2023-11-21 19:34:15,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 83 treesize of output 161 [2023-11-21 19:34:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:21,399 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:21,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:34:21,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003236160] [2023-11-21 19:34:21,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003236160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:21,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:21,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:34:21,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308535352] [2023-11-21 19:34:21,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:21,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:34:21,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:34:21,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:34:21,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:21,402 INFO L87 Difference]: Start difference. First operand 3898 states and 14337 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:26,594 INFO L93 Difference]: Finished difference Result 3297 states and 11876 transitions. [2023-11-21 19:34:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:34:26,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-21 19:34:26,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:26,639 INFO L225 Difference]: With dead ends: 3297 [2023-11-21 19:34:26,640 INFO L226 Difference]: Without dead ends: 3297 [2023-11-21 19:34:26,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2023-11-21 19:34:26,643 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 125 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:26,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 32 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-21 19:34:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2023-11-21 19:34:26,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 3297. [2023-11-21 19:34:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3297 states, 3132 states have (on average 3.7918263090676882) internal successors, (11876), 3296 states have internal predecessors, (11876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3297 states to 3297 states and 11876 transitions. [2023-11-21 19:34:26,786 INFO L78 Accepts]: Start accepts. Automaton has 3297 states and 11876 transitions. Word has length 4 [2023-11-21 19:34:26,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:26,786 INFO L495 AbstractCegarLoop]: Abstraction has 3297 states and 11876 transitions. [2023-11-21 19:34:26,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:26,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3297 states and 11876 transitions. [2023-11-21 19:34:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-21 19:34:26,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:26,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-21 19:34:26,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:26,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:26,992 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-21 19:34:26,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash 15805992, now seen corresponding path program 1 times [2023-11-21 19:34:26,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:34:26,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620024830] [2023-11-21 19:34:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:26,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:26,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:34:26,994 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:34:27,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:27,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 19:34:27,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:27,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:27,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:27,157 INFO L378 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 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-21 19:34:27,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:27,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:27,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-21 19:34:27,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:27,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:27,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:27,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 19:34:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:27,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:27,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:27,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 19:34:27,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:27,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 19:34:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:27,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:27,389 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:34:27,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620024830] [2023-11-21 19:34:27,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620024830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:27,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:27,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:34:27,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817164000] [2023-11-21 19:34:27,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:27,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:34:27,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:34:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:34:27,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:34:27,391 INFO L87 Difference]: Start difference. First operand 3297 states and 11876 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:27,723 INFO L93 Difference]: Finished difference Result 2696 states and 9415 transitions. [2023-11-21 19:34:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:27,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-21 19:34:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:27,754 INFO L225 Difference]: With dead ends: 2696 [2023-11-21 19:34:27,754 INFO L226 Difference]: Without dead ends: 2696 [2023-11-21 19:34:27,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:34:27,755 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:27,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 16 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:34:27,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2023-11-21 19:34:27,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2696. [2023-11-21 19:34:27,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2577 states have (on average 3.6534730306558014) internal successors, (9415), 2695 states have internal predecessors, (9415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:27,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 9415 transitions. [2023-11-21 19:34:27,864 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 9415 transitions. Word has length 4 [2023-11-21 19:34:27,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:27,864 INFO L495 AbstractCegarLoop]: Abstraction has 2696 states and 9415 transitions. [2023-11-21 19:34:27,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:27,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 9415 transitions. [2023-11-21 19:34:27,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 19:34:27,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:27,865 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-11-21 19:34:27,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:28,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:28,072 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-21 19:34:28,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:28,072 INFO L85 PathProgramCache]: Analyzing trace with hash 489972126, now seen corresponding path program 1 times [2023-11-21 19:34:28,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:34:28,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029641455] [2023-11-21 19:34:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:28,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:28,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:34:28,073 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:34:28,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:28,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 19:34:28,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:28,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-21 19:34:28,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,210 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:28,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,225 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:28,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,270 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:28,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,278 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:28,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:28,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,320 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:28,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,339 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:28,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:28,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:28,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-21 19:34:28,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,439 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:28,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,452 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:28,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,467 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:28,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,475 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:28,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,491 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:28,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:28,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,528 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:28,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,540 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:28,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,551 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:28,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,564 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:28,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:28,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:28,602 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:28,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:34:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:29,266 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:34:29,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029641455] [2023-11-21 19:34:29,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029641455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:34:29,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [973053743] [2023-11-21 19:34:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:29,267 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 19:34:29,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 19:34:29,273 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 19:34:29,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-11-21 19:34:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:29,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:34:29,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:29,439 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-21 19:34:29,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,457 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:29,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:29,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,492 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:29,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,515 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:29,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,524 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:29,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:29,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,570 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:29,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,587 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:29,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:29,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-21 19:34:29,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:29,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,707 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:29,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:29,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,744 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:29,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,751 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:29,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,764 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,772 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:29,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,787 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:29,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,796 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:29,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,808 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:29,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,816 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:29,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:29,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:29,854 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:29,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:34:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:30,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [973053743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:34:30,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293194779] [2023-11-21 19:34:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:30,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:30,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:30,068 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:30,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 19:34:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:30,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 19:34:30,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:30,174 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-21 19:34:30,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,186 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:30,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:30,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,230 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:30,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,243 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:30,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,251 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:30,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,268 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:30,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,301 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:30,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:30,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:30,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-21 19:34:30,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,417 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:30,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,426 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:30,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:30,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,462 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:30,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,479 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:30,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,487 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:30,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,501 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:30,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:30,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,574 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:30,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,582 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:30,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,594 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:30,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:30,605 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:30,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:34:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:30,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293194779] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:34:30,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 19:34:30,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 3, 3] total 9 [2023-11-21 19:34:30,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394117713] [2023-11-21 19:34:30,818 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 19:34:30,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 19:34:30,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:34:30,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 19:34:30,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:34:30,819 INFO L87 Difference]: Start difference. First operand 2696 states and 9415 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:32,909 INFO L93 Difference]: Finished difference Result 2708 states and 9433 transitions. [2023-11-21 19:34:32,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 19:34:32,910 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-21 19:34:32,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:32,927 INFO L225 Difference]: With dead ends: 2708 [2023-11-21 19:34:32,927 INFO L226 Difference]: Without dead ends: 2708 [2023-11-21 19:34:32,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-11-21 19:34:32,928 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:32,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 109 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-21 19:34:32,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2023-11-21 19:34:33,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 2708. [2023-11-21 19:34:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2708 states, 2589 states have (on average 3.6434916956353804) internal successors, (9433), 2707 states have internal predecessors, (9433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:33,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2708 states to 2708 states and 9433 transitions. [2023-11-21 19:34:33,026 INFO L78 Accepts]: Start accepts. Automaton has 2708 states and 9433 transitions. Word has length 5 [2023-11-21 19:34:33,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:33,026 INFO L495 AbstractCegarLoop]: Abstraction has 2708 states and 9433 transitions. [2023-11-21 19:34:33,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:33,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2708 states and 9433 transitions. [2023-11-21 19:34:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 19:34:33,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:33,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:33,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2023-11-21 19:34:33,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:33,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:33,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:33,630 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-21 19:34:33,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:33,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1569596463, now seen corresponding path program 1 times [2023-11-21 19:34:33,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:34:33,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929023424] [2023-11-21 19:34:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:33,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:33,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:34:33,632 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:34:33,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-21 19:34:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:33,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 19:34:33,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:33,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:33,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:33,750 INFO L378 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 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-21 19:34:33,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:33,796 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-21 19:34:33,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2023-11-21 19:34:33,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:33,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:33,843 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-21 19:34:33,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-21 19:34:33,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:33,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:33,885 INFO L378 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 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-21 19:34:33,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:33,945 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-21 19:34:33,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-21 19:34:33,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:33,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:33,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-21 19:34:33,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:34,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:34,039 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-21 19:34:34,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-21 19:34:34,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:34,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:34,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:34,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2023-11-21 19:34:34,122 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 19:34:34,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-21 19:34:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:34,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:34,184 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:34:34,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929023424] [2023-11-21 19:34:34,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929023424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:34,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:34,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:34:34,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828882030] [2023-11-21 19:34:34,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:34,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:34:34,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:34:34,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:34:34,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:34:34,185 INFO L87 Difference]: Start difference. First operand 2708 states and 9433 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) [2023-11-21 19:34:34,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:34,408 INFO L93 Difference]: Finished difference Result 2602 states and 9111 transitions. [2023-11-21 19:34:34,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:34,409 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 [2023-11-21 19:34:34,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:34,425 INFO L225 Difference]: With dead ends: 2602 [2023-11-21 19:34:34,425 INFO L226 Difference]: Without dead ends: 2602 [2023-11-21 19:34:34,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:34:34,426 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:34,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 16 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:34:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2023-11-21 19:34:34,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2602. [2023-11-21 19:34:34,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2501 states have (on average 3.6429428228708516) internal successors, (9111), 2601 states have internal predecessors, (9111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 9111 transitions. [2023-11-21 19:34:34,557 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 9111 transitions. Word has length 7 [2023-11-21 19:34:34,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:34,557 INFO L495 AbstractCegarLoop]: Abstraction has 2602 states and 9111 transitions. [2023-11-21 19:34:34,557 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) [2023-11-21 19:34:34,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 9111 transitions. [2023-11-21 19:34:34,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 19:34:34,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:34,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:34,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-21 19:34:34,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:34,762 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-21 19:34:34,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:34,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1569596462, now seen corresponding path program 1 times [2023-11-21 19:34:34,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:34:34,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650789767] [2023-11-21 19:34:34,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:34,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:34,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:34:34,764 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:34:34,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:34,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 19:34:34,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:34,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:34,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:34,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-21 19:34:34,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:34,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-21 19:34:34,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:34,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:34,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 19:34:34,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:34,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 19:34:35,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:35,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:35,018 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:35,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:35,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:35,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 19:34:35,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:35,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:35,077 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:35,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:35,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:35,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:35,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 19:34:35,129 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:34:35,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:35,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 19:34:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:35,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:35,270 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:34:35,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650789767] [2023-11-21 19:34:35,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650789767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:35,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:35,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:34:35,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425631735] [2023-11-21 19:34:35,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:35,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:34:35,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:34:35,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:34:35,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:34:35,272 INFO L87 Difference]: Start difference. First operand 2602 states and 9111 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:35,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:35,538 INFO L93 Difference]: Finished difference Result 2496 states and 8789 transitions. [2023-11-21 19:34:35,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:35,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 19:34:35,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:35,554 INFO L225 Difference]: With dead ends: 2496 [2023-11-21 19:34:35,554 INFO L226 Difference]: Without dead ends: 2496 [2023-11-21 19:34:35,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:34:35,556 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:35,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 14 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:34:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2023-11-21 19:34:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2496. [2023-11-21 19:34:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2413 states have (on average 3.6423539162867797) internal successors, (8789), 2495 states have internal predecessors, (8789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 8789 transitions. [2023-11-21 19:34:35,642 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 8789 transitions. Word has length 7 [2023-11-21 19:34:35,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:35,642 INFO L495 AbstractCegarLoop]: Abstraction has 2496 states and 8789 transitions. [2023-11-21 19:34:35,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:35,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 8789 transitions. [2023-11-21 19:34:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 19:34:35,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:35,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:35,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:35,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:35,846 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-21 19:34:35,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:35,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1412815894, now seen corresponding path program 1 times [2023-11-21 19:34:35,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:34:35,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441232799] [2023-11-21 19:34:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:35,847 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:35,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:34:35,848 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:34:35,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:35,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 19:34:35,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:36,017 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:36,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:34:36,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441232799] [2023-11-21 19:34:36,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441232799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:36,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:36,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:34:36,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258844131] [2023-11-21 19:34:36,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:36,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:34:36,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:34:36,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:34:36,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:36,019 INFO L87 Difference]: Start difference. First operand 2496 states and 8789 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:36,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:36,548 INFO L93 Difference]: Finished difference Result 3911 states and 13335 transitions. [2023-11-21 19:34:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:34:36,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 19:34:36,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:36,572 INFO L225 Difference]: With dead ends: 3911 [2023-11-21 19:34:36,572 INFO L226 Difference]: Without dead ends: 3911 [2023-11-21 19:34:36,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:34:36,574 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 76 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:36,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 103 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:34:36,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2023-11-21 19:34:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 3205. [2023-11-21 19:34:36,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3205 states, 3122 states have (on average 3.639974375400384) internal successors, (11364), 3204 states have internal predecessors, (11364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3205 states to 3205 states and 11364 transitions. [2023-11-21 19:34:36,726 INFO L78 Accepts]: Start accepts. Automaton has 3205 states and 11364 transitions. Word has length 8 [2023-11-21 19:34:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:36,726 INFO L495 AbstractCegarLoop]: Abstraction has 3205 states and 11364 transitions. [2023-11-21 19:34:36,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3205 states and 11364 transitions. [2023-11-21 19:34:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 19:34:36,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:36,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:36,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:36,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:36,930 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-21 19:34:36,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:36,931 INFO L85 PathProgramCache]: Analyzing trace with hash -538752184, now seen corresponding path program 1 times [2023-11-21 19:34:36,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:34:36,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144335703] [2023-11-21 19:34:36,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:36,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:34:36,932 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:34:36,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-21 19:34:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:37,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 19:34:37,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:37,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,099 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-21 19:34:37,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-21 19:34:37,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,117 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-21 19:34:37,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-21 19:34:37,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,133 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-21 19:34:37,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 19:34:37,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,165 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-21 19:34:37,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-21 19:34:37,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,176 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-21 19:34:37,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-21 19:34:37,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,194 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-21 19:34:37,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 19:34:37,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,235 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-21 19:34:37,235 INFO L378 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 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-21 19:34:37,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,248 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-21 19:34:37,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-21 19:34:37,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,263 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-21 19:34:37,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-21 19:34:37,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,324 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-21 19:34:37,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-21 19:34:37,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,357 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-21 19:34:37,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-21 19:34:37,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:37,391 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-21 19:34:37,391 INFO L378 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 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-21 19:34:37,420 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 19:34:37,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-21 19:34:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:37,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:37,451 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:34:37,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144335703] [2023-11-21 19:34:37,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144335703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:37,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:37,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:34:37,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111617722] [2023-11-21 19:34:37,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:37,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:34:37,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:34:37,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:34:37,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:34:37,453 INFO L87 Difference]: Start difference. First operand 3205 states and 11364 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2023-11-21 19:34:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:37,689 INFO L93 Difference]: Finished difference Result 3115 states and 11103 transitions. [2023-11-21 19:34:37,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:37,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-21 19:34:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:37,708 INFO L225 Difference]: With dead ends: 3115 [2023-11-21 19:34:37,708 INFO L226 Difference]: Without dead ends: 3115 [2023-11-21 19:34:37,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:34:37,709 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:37,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 14 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:34:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2023-11-21 19:34:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3115. [2023-11-21 19:34:37,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3115 states, 3050 states have (on average 3.640327868852459) internal successors, (11103), 3114 states have internal predecessors, (11103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 11103 transitions. [2023-11-21 19:34:37,818 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 11103 transitions. Word has length 10 [2023-11-21 19:34:37,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:37,819 INFO L495 AbstractCegarLoop]: Abstraction has 3115 states and 11103 transitions. [2023-11-21 19:34:37,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2023-11-21 19:34:37,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 11103 transitions. [2023-11-21 19:34:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 19:34:37,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:37,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:37,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:38,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:38,023 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-21 19:34:38,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:38,024 INFO L85 PathProgramCache]: Analyzing trace with hash -538752183, now seen corresponding path program 1 times [2023-11-21 19:34:38,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:34:38,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656008463] [2023-11-21 19:34:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:38,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:38,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:34:38,040 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:34:38,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:38,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:34:38,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:38,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,189 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-21 19:34:38,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,202 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:34:38,207 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:34:38,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 19:34:38,242 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:34:38,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,265 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,285 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:34:38,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,296 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:34:38,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,306 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:34:38,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 19:34:38,348 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:34:38,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,367 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 19:34:38,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:38,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 19:34:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:38,595 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:38,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:34:38,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656008463] [2023-11-21 19:34:38,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656008463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:38,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:38,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:34:38,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377758830] [2023-11-21 19:34:38,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:38,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:34:38,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:34:38,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:34:38,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:34:38,598 INFO L87 Difference]: Start difference. First operand 3115 states and 11103 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:38,931 INFO L93 Difference]: Finished difference Result 3025 states and 10842 transitions. [2023-11-21 19:34:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:38,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-21 19:34:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:38,951 INFO L225 Difference]: With dead ends: 3025 [2023-11-21 19:34:38,952 INFO L226 Difference]: Without dead ends: 3025 [2023-11-21 19:34:38,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:38,953 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:38,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 12 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:34:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2023-11-21 19:34:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 3025. [2023-11-21 19:34:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 2978 states have (on average 3.640698455339154) internal successors, (10842), 3024 states have internal predecessors, (10842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 10842 transitions. [2023-11-21 19:34:39,082 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 10842 transitions. Word has length 10 [2023-11-21 19:34:39,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:39,083 INFO L495 AbstractCegarLoop]: Abstraction has 3025 states and 10842 transitions. [2023-11-21 19:34:39,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:39,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 10842 transitions. [2023-11-21 19:34:39,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 19:34:39,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:39,085 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2023-11-21 19:34:39,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:39,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:39,292 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-21 19:34:39,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:39,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1272976696, now seen corresponding path program 2 times [2023-11-21 19:34:39,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:34:39,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828827762] [2023-11-21 19:34:39,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 19:34:39,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:34:39,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:34:39,300 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:34:39,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 19:34:39,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 19:34:39,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:34:39,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 19:34:39,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:39,465 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-21 19:34:39,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:39,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-21 19:34:39,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:39,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,565 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:39,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:39,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,604 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:39,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:39,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,636 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:39,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,644 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:39,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,652 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,662 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:39,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,673 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:39,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,684 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:39,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,698 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:39,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,704 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:39,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,718 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:39,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:39,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,755 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:39,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:39,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,790 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:39,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,801 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:39,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,811 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:39,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:39,822 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:40,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:34:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:41,195 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:34:41,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828827762] [2023-11-21 19:34:41,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828827762] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:34:41,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1822069118] [2023-11-21 19:34:41,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 19:34:41,195 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 19:34:41,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 19:34:41,196 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 19:34:41,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2023-11-21 19:34:41,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 19:34:41,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:34:41,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 19:34:41,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:41,468 INFO L378 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 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-21 19:34:41,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,484 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:41,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,503 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:41,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,511 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:41,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,519 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:41,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,531 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:41,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:41,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,574 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:41,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,590 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:41,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,602 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:41,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,611 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:41,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,623 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:41,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,638 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:41,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,647 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:41,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,661 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:41,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:41,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,695 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:41,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,707 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:41,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:41,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-21 19:34:41,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,814 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:41,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:41,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:41,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:41,876 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:42,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:34:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:42,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1822069118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:34:42,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694676912] [2023-11-21 19:34:42,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 19:34:42,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:42,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:42,528 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:42,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6addb832-b051-4fe5-8917-33e153148d72/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-21 19:34:42,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 19:34:42,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:34:42,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 19:34:42,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:42,666 INFO L378 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 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-21 19:34:42,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,685 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:42,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,693 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:42,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,702 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:42,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,713 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:42,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,719 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:42,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:42,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,755 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:42,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,762 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:42,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,772 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:42,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,782 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:42,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,789 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:42,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:42,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,830 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,842 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:42,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,850 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:42,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,862 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,869 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:34:42,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-21 19:34:42,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:42,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:42,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,967 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:42,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:42,982 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 19:34:43,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:34:43,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:34:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:43,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:34:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:43,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694676912] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:34:43,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 19:34:43,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 12 [2023-11-21 19:34:43,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867777727] [2023-11-21 19:34:43,577 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 19:34:43,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 19:34:43,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:34:43,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 19:34:43,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-21 19:34:43,578 INFO L87 Difference]: Start difference. First operand 3025 states and 10842 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:50,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:34:52,579 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 []