./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 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_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire --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 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:31:10,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:31:10,407 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-23 21:31:10,414 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:31:10,415 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:31:10,453 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:31:10,454 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:31:10,455 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:31:10,456 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:31:10,461 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:31:10,461 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:31:10,462 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:31:10,463 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:31:10,465 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:31:10,465 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:31:10,466 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:31:10,466 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:31:10,467 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:31:10,467 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:31:10,468 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:31:10,468 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:31:10,469 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:31:10,470 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:31:10,470 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:31:10,471 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:31:10,472 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:31:10,472 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:31:10,473 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:31:10,473 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:31:10,474 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:31:10,475 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:31:10,475 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:31:10,475 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:31:10,476 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:31:10,476 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:31:10,476 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:31:10,477 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:31:10,477 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:31:10,477 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:31:10,478 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:31:10,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:10,478 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:31:10,479 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:31:10,479 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:31:10,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:31:10,480 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:31:10,480 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:31:10,481 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:31:10,481 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_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2023-11-23 21:31:10,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:31:10,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:31:10,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:31:10,830 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:31:10,831 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:31:10,832 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-23 21:31:13,851 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:31:14,093 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:31:14,094 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-23 21:31:14,104 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/data/da1dc696c/75fc2b3dca05448fbeea8e7ca53b5959/FLAGf85ddea2c [2023-11-23 21:31:14,119 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/data/da1dc696c/75fc2b3dca05448fbeea8e7ca53b5959 [2023-11-23 21:31:14,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:31:14,124 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:31:14,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:14,125 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:31:14,131 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:31:14,132 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:14" (1/1) ... [2023-11-23 21:31:14,133 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19df94db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:14, skipping insertion in model container [2023-11-23 21:31:14,133 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:14" (1/1) ... [2023-11-23 21:31:14,164 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:31:14,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:14,423 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) [2023-11-23 21:31:14,423 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d5b48de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:14, skipping insertion in model container [2023-11-23 21:31:14,424 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:14,424 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-23 21:31:14,426 INFO L158 Benchmark]: Toolchain (without parser) took 301.63ms. Allocated memory is still 132.1MB. Free memory was 87.9MB in the beginning and 77.0MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 21:31:14,427 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 94.4MB. Free memory is still 40.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:31:14,428 INFO L158 Benchmark]: CACSL2BoogieTranslator took 298.99ms. Allocated memory is still 132.1MB. Free memory was 87.5MB in the beginning and 77.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 21:31:14,429 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 94.4MB. Free memory is still 40.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 298.99ms. Allocated memory is still 132.1MB. Free memory was 87.5MB in the beginning and 77.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 151]: 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_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire --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 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:31:16,863 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:31:17,001 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-23 21:31:17,018 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:31:17,019 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:31:17,075 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:31:17,076 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:31:17,077 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:31:17,078 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:31:17,084 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:31:17,084 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:31:17,085 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:31:17,085 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:31:17,087 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:31:17,088 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:31:17,088 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:31:17,089 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:31:17,090 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:31:17,091 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:31:17,091 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:31:17,092 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:31:17,092 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:31:17,093 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:31:17,093 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:31:17,094 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:31:17,094 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:31:17,095 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:31:17,095 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:31:17,096 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 21:31:17,096 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 21:31:17,098 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:31:17,098 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:31:17,099 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:31:17,099 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:31:17,099 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:31:17,100 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:31:17,101 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:31:17,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:17,102 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:31:17,102 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:31:17,103 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 21:31:17,103 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 21:31:17,103 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:31:17,104 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:31:17,104 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:31:17,105 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_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2023-11-23 21:31:17,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:31:17,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:31:17,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:31:17,558 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:31:17,558 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:31:17,560 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-23 21:31:20,904 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:31:21,209 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:31:21,221 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-23 21:31:21,233 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/data/6080e2cf1/a841c9025dcb477aa568bd262717136f/FLAG78935a26d [2023-11-23 21:31:21,252 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/data/6080e2cf1/a841c9025dcb477aa568bd262717136f [2023-11-23 21:31:21,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:31:21,260 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:31:21,263 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:21,263 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:31:21,269 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:31:21,270 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:21" (1/1) ... [2023-11-23 21:31:21,271 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6053e93c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21, skipping insertion in model container [2023-11-23 21:31:21,271 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:21" (1/1) ... [2023-11-23 21:31:21,323 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:31:21,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:21,656 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-23 21:31:21,667 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:31:21,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:21,730 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:31:21,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:21,814 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:31:21,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21 WrapperNode [2023-11-23 21:31:21,814 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:21,816 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:21,816 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:31:21,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:31:21,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21" (1/1) ... [2023-11-23 21:31:21,841 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21" (1/1) ... [2023-11-23 21:31:21,884 INFO L138 Inliner]: procedures = 28, calls = 45, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 302 [2023-11-23 21:31:21,884 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:21,885 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:31:21,885 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:31:21,885 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:31:21,895 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21" (1/1) ... [2023-11-23 21:31:21,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21" (1/1) ... [2023-11-23 21:31:21,902 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21" (1/1) ... [2023-11-23 21:31:21,902 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21" (1/1) ... [2023-11-23 21:31:21,915 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21" (1/1) ... [2023-11-23 21:31:21,938 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21" (1/1) ... [2023-11-23 21:31:21,940 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21" (1/1) ... [2023-11-23 21:31:21,943 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21" (1/1) ... [2023-11-23 21:31:21,956 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:31:21,957 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:31:21,957 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:31:21,957 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:31:21,958 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21" (1/1) ... [2023-11-23 21:31:21,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:21,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:21,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:31:22,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:31:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:31:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 21:31:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:31:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-23 21:31:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 21:31:22,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 21:31:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 21:31:22,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 21:31:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 21:31:22,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 21:31:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:31:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:31:22,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:31:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:31:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-23 21:31:22,037 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 21:31:22,245 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:31:22,248 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:31:23,063 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:31:23,622 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:31:23,622 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 21:31:23,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:23 BoogieIcfgContainer [2023-11-23 21:31:23,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:31:23,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:31:23,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:31:23,629 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:31:23,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:31:21" (1/3) ... [2023-11-23 21:31:23,631 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578df988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:23, skipping insertion in model container [2023-11-23 21:31:23,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:21" (2/3) ... [2023-11-23 21:31:23,632 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578df988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:23, skipping insertion in model container [2023-11-23 21:31:23,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:23" (3/3) ... [2023-11-23 21:31:23,633 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-11-23 21:31:23,656 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:31:23,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-11-23 21:31:23,657 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 21:31:23,755 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 21:31:23,789 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 73 places, 70 transitions, 161 flow [2023-11-23 21:31:24,031 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3294 states, 3160 states have (on average 4.099050632911393) internal successors, (12953), 3293 states have internal predecessors, (12953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:24,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:31:24,059 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;@5aa1e8e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:31:24,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-23 21:31:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 3294 states, 3160 states have (on average 4.099050632911393) internal successors, (12953), 3293 states have internal predecessors, (12953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:24,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:31:24,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:24,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:31:24,084 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:24,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:24,090 INFO L85 PathProgramCache]: Analyzing trace with hash 901133, now seen corresponding path program 1 times [2023-11-23 21:31:24,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:24,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258456852] [2023-11-23 21:31:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:24,105 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 [2023-11-23 21:31:24,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:24,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:24,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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 [2023-11-23 21:31:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:24,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:31:24,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:24,371 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 7 [2023-11-23 21:31:24,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,396 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 [2023-11-23 21:31:24,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,410 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 [2023-11-23 21:31:24,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,421 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 [2023-11-23 21:31:24,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,433 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 [2023-11-23 21:31:24,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,444 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 [2023-11-23 21:31:24,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,473 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 [2023-11-23 21:31:24,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,493 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 [2023-11-23 21:31:24,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,503 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 [2023-11-23 21:31:24,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,514 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 [2023-11-23 21:31:24,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,525 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 [2023-11-23 21:31:24,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,537 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 [2023-11-23 21:31:24,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,559 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 [2023-11-23 21:31:24,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,571 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 [2023-11-23 21:31:24,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,596 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 [2023-11-23 21:31:24,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,610 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 [2023-11-23 21:31:24,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,622 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 [2023-11-23 21:31:24,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,633 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 [2023-11-23 21:31:24,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,685 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 [2023-11-23 21:31:24,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,714 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 [2023-11-23 21:31:24,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,738 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 [2023-11-23 21:31:24,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,755 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 11 treesize of output 1 [2023-11-23 21:31:24,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,775 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 [2023-11-23 21:31:24,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:24,792 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 [2023-11-23 21:31:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:24,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:24,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:24,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258456852] [2023-11-23 21:31:24,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258456852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:24,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:24,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:31:24,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86812020] [2023-11-23 21:31:24,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:24,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:24,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:24,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:24,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:24,865 INFO L87 Difference]: Start difference. First operand has 3294 states, 3160 states have (on average 4.099050632911393) internal successors, (12953), 3293 states have internal predecessors, (12953), 0 states have call successors, (0), 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) [2023-11-23 21:31:25,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:25,212 INFO L93 Difference]: Finished difference Result 3291 states and 11820 transitions. [2023-11-23 21:31:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:25,215 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 [2023-11-23 21:31:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:25,284 INFO L225 Difference]: With dead ends: 3291 [2023-11-23 21:31:25,284 INFO L226 Difference]: Without dead ends: 3291 [2023-11-23 21:31:25,286 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 [2023-11-23 21:31:25,291 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:25,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:25,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2023-11-23 21:31:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 3291. [2023-11-23 21:31:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 3159 states have (on average 3.741690408357075) internal successors, (11820), 3290 states have internal predecessors, (11820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 11820 transitions. [2023-11-23 21:31:25,578 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 11820 transitions. Word has length 3 [2023-11-23 21:31:25,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:25,578 INFO L495 AbstractCegarLoop]: Abstraction has 3291 states and 11820 transitions. [2023-11-23 21:31:25,579 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) [2023-11-23 21:31:25,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 11820 transitions. [2023-11-23 21:31:25,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:31:25,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:25,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:31:25,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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)] Ended with exit code 0 [2023-11-23 21:31:25,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:25,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:25,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:25,783 INFO L85 PathProgramCache]: Analyzing trace with hash 901134, now seen corresponding path program 1 times [2023-11-23 21:31:25,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:25,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051911037] [2023-11-23 21:31:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:25,784 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 [2023-11-23 21:31:25,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:25,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:25,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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 [2023-11-23 21:31:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:25,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:31:25,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:25,932 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 5 [2023-11-23 21:31:25,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:25,948 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 [2023-11-23 21:31:25,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:25,959 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 [2023-11-23 21:31:25,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:25,966 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 [2023-11-23 21:31:25,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:25,989 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 [2023-11-23 21:31:26,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,009 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 [2023-11-23 21:31:26,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,095 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 [2023-11-23 21:31:26,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,116 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 [2023-11-23 21:31:26,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,138 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 [2023-11-23 21:31:26,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,151 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 [2023-11-23 21:31:26,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,182 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 [2023-11-23 21:31:26,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,199 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 [2023-11-23 21:31:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,223 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 [2023-11-23 21:31:26,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,242 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 [2023-11-23 21:31:26,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,254 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 [2023-11-23 21:31:26,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,261 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 [2023-11-23 21:31:26,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,274 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 [2023-11-23 21:31:26,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,287 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 [2023-11-23 21:31:26,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,315 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 [2023-11-23 21:31:26,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,326 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 [2023-11-23 21:31:26,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,334 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 [2023-11-23 21:31:26,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,344 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 [2023-11-23 21:31:26,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,355 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 [2023-11-23 21:31:26,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:26,362 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 [2023-11-23 21:31:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:26,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:26,389 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:26,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051911037] [2023-11-23 21:31:26,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051911037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:26,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:26,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:31:26,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427127053] [2023-11-23 21:31:26,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:26,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:26,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:26,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:26,393 INFO L87 Difference]: Start difference. First operand 3291 states and 11820 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:26,728 INFO L93 Difference]: Finished difference Result 3293 states and 11823 transitions. [2023-11-23 21:31:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:26,729 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 [2023-11-23 21:31:26,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:26,771 INFO L225 Difference]: With dead ends: 3293 [2023-11-23 21:31:26,771 INFO L226 Difference]: Without dead ends: 3293 [2023-11-23 21:31:26,771 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 [2023-11-23 21:31:26,773 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:26,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:31:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2023-11-23 21:31:26,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 3293. [2023-11-23 21:31:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 3161 states have (on average 3.7402720658019613) internal successors, (11823), 3292 states have internal predecessors, (11823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 11823 transitions. [2023-11-23 21:31:26,994 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 11823 transitions. Word has length 3 [2023-11-23 21:31:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:26,994 INFO L495 AbstractCegarLoop]: Abstraction has 3293 states and 11823 transitions. [2023-11-23 21:31:26,995 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) [2023-11-23 21:31:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 11823 transitions. [2023-11-23 21:31:26,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:31:26,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:26,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:31:27,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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 [2023-11-23 21:31:27,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:27,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:27,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:27,200 INFO L85 PathProgramCache]: Analyzing trace with hash 901212, now seen corresponding path program 1 times [2023-11-23 21:31:27,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:27,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309143523] [2023-11-23 21:31:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:27,200 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 [2023-11-23 21:31:27,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:27,207 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:27,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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 [2023-11-23 21:31:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:27,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:31:27,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:27,324 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:27,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:27,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309143523] [2023-11-23 21:31:27,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309143523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:27,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:27,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:31:27,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616830439] [2023-11-23 21:31:27,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:27,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:27,329 INFO L87 Difference]: Start difference. First operand 3293 states and 11823 transitions. Second operand has 3 states, 3 states have (on average 1.0) 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) [2023-11-23 21:31:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:27,545 INFO L93 Difference]: Finished difference Result 3293 states and 11822 transitions. [2023-11-23 21:31:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) 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 [2023-11-23 21:31:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:27,585 INFO L225 Difference]: With dead ends: 3293 [2023-11-23 21:31:27,588 INFO L226 Difference]: Without dead ends: 3293 [2023-11-23 21:31:27,589 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 [2023-11-23 21:31:27,592 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:27,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2023-11-23 21:31:27,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 3293. [2023-11-23 21:31:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 3161 states have (on average 3.739955710218285) internal successors, (11822), 3292 states have internal predecessors, (11822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 11822 transitions. [2023-11-23 21:31:27,827 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 11822 transitions. Word has length 3 [2023-11-23 21:31:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:27,833 INFO L495 AbstractCegarLoop]: Abstraction has 3293 states and 11822 transitions. [2023-11-23 21:31:27,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) 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) [2023-11-23 21:31:27,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 11822 transitions. [2023-11-23 21:31:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:31:27,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:27,834 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-11-23 21:31:27,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:28,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:28,037 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:28,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:28,038 INFO L85 PathProgramCache]: Analyzing trace with hash 866019281, now seen corresponding path program 1 times [2023-11-23 21:31:28,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:28,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377512266] [2023-11-23 21:31:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:28,038 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 [2023-11-23 21:31:28,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:28,040 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:28,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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 [2023-11-23 21:31:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:28,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:31:28,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:28,174 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 5 [2023-11-23 21:31:28,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,187 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 [2023-11-23 21:31:28,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,208 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 [2023-11-23 21:31:28,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,219 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 [2023-11-23 21:31:28,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,227 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 [2023-11-23 21:31:28,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,236 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 [2023-11-23 21:31:28,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,292 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 [2023-11-23 21:31:28,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,299 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 [2023-11-23 21:31:28,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,319 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 16 treesize of output 1 [2023-11-23 21:31:28,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,331 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 [2023-11-23 21:31:28,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,347 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 [2023-11-23 21:31:28,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,358 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 [2023-11-23 21:31:28,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,385 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 [2023-11-23 21:31:28,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,392 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 [2023-11-23 21:31:28,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,407 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 [2023-11-23 21:31:28,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,422 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 [2023-11-23 21:31:28,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,454 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 [2023-11-23 21:31:28,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,466 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 [2023-11-23 21:31:28,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,501 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 [2023-11-23 21:31:28,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,517 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 [2023-11-23 21:31:28,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,531 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 11 treesize of output 1 [2023-11-23 21:31:28,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,551 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 [2023-11-23 21:31:28,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,586 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 [2023-11-23 21:31:28,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:28,609 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 [2023-11-23 21:31:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:28,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:28,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:28,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377512266] [2023-11-23 21:31:28,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377512266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:28,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1919676141] [2023-11-23 21:31:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:28,831 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:31:28,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:31:28,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:31:28,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-11-23 21:31:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:29,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:31:29,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:29,090 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 [2023-11-23 21:31:29,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,107 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 [2023-11-23 21:31:29,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,119 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 [2023-11-23 21:31:29,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,126 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 [2023-11-23 21:31:29,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,139 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 [2023-11-23 21:31:29,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,146 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 [2023-11-23 21:31:29,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,165 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 [2023-11-23 21:31:29,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,174 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 [2023-11-23 21:31:29,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,185 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 [2023-11-23 21:31:29,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,192 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 [2023-11-23 21:31:29,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,210 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 11 treesize of output 1 [2023-11-23 21:31:29,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,232 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 [2023-11-23 21:31:29,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,245 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 [2023-11-23 21:31:29,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,258 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 [2023-11-23 21:31:29,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,270 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 11 treesize of output 1 [2023-11-23 21:31:29,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,277 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 [2023-11-23 21:31:29,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,309 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 [2023-11-23 21:31:29,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,324 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 [2023-11-23 21:31:29,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,368 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 [2023-11-23 21:31:29,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,398 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 [2023-11-23 21:31:29,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,424 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 [2023-11-23 21:31:29,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,435 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 [2023-11-23 21:31:29,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,460 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 [2023-11-23 21:31:29,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,471 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 [2023-11-23 21:31:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:29,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:29,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1919676141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:29,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082036443] [2023-11-23 21:31:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:29,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:29,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:29,602 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:29,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:31:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:29,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:31:29,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:29,760 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 [2023-11-23 21:31:29,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,790 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 [2023-11-23 21:31:29,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,805 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 [2023-11-23 21:31:29,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,823 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 [2023-11-23 21:31:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,839 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 [2023-11-23 21:31:29,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,858 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 [2023-11-23 21:31:29,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,872 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 [2023-11-23 21:31:29,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,879 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 [2023-11-23 21:31:29,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,902 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 [2023-11-23 21:31:29,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,915 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 [2023-11-23 21:31:29,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,925 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 [2023-11-23 21:31:29,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,936 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 [2023-11-23 21:31:29,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,962 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 [2023-11-23 21:31:29,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,974 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 [2023-11-23 21:31:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,983 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 [2023-11-23 21:31:29,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:29,993 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 [2023-11-23 21:31:30,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:30,010 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 [2023-11-23 21:31:30,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:30,018 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 [2023-11-23 21:31:30,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:30,034 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 [2023-11-23 21:31:30,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:30,055 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 [2023-11-23 21:31:30,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:30,069 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 [2023-11-23 21:31:30,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:30,080 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 [2023-11-23 21:31:30,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:30,088 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 [2023-11-23 21:31:30,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:30,109 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 [2023-11-23 21:31:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:30,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:30,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082036443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:30,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:31:30,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 4 [2023-11-23 21:31:30,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459884725] [2023-11-23 21:31:30,215 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:30,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:31:30,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:31:30,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:31:30,216 INFO L87 Difference]: Start difference. First operand 3293 states and 11822 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:31,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:31,053 INFO L93 Difference]: Finished difference Result 3297 states and 11828 transitions. [2023-11-23 21:31:31,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:31:31,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 21:31:31,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:31,091 INFO L225 Difference]: With dead ends: 3297 [2023-11-23 21:31:31,091 INFO L226 Difference]: Without dead ends: 3297 [2023-11-23 21:31:31,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:31:31,093 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:31,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:31:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2023-11-23 21:31:31,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 3297. [2023-11-23 21:31:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3297 states, 3165 states have (on average 3.7371248025276462) internal successors, (11828), 3296 states have internal predecessors, (11828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:31,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3297 states to 3297 states and 11828 transitions. [2023-11-23 21:31:31,232 INFO L78 Accepts]: Start accepts. Automaton has 3297 states and 11828 transitions. Word has length 5 [2023-11-23 21:31:31,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:31,233 INFO L495 AbstractCegarLoop]: Abstraction has 3297 states and 11828 transitions. [2023-11-23 21:31:31,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3297 states and 11828 transitions. [2023-11-23 21:31:31,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:31:31,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:31,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:31:31,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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 [2023-11-23 21:31:31,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:31,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:31,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt [2023-11-23 21:31:31,837 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:31,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:31,837 INFO L85 PathProgramCache]: Analyzing trace with hash 866019359, now seen corresponding path program 1 times [2023-11-23 21:31:31,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:31,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202384357] [2023-11-23 21:31:31,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:31,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:31,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:31,839 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:31,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-23 21:31:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:31,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:31:31,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:31,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:32,006 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:32,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202384357] [2023-11-23 21:31:32,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202384357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:32,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2096747871] [2023-11-23 21:31:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:32,007 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:31:32,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:31:32,016 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:31:32,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-11-23 21:31:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:32,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:31:32,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:32,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:32,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2096747871] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:32,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015454437] [2023-11-23 21:31:32,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:32,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:32,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:32,221 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:32,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:31:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:32,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:31:32,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:32,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:32,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015454437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:32,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:31:32,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 5 [2023-11-23 21:31:32,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766956179] [2023-11-23 21:31:32,365 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:32,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:31:32,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:32,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:31:32,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:31:32,366 INFO L87 Difference]: Start difference. First operand 3297 states and 11828 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:32,658 INFO L93 Difference]: Finished difference Result 3297 states and 11826 transitions. [2023-11-23 21:31:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:31:32,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 21:31:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:32,683 INFO L225 Difference]: With dead ends: 3297 [2023-11-23 21:31:32,684 INFO L226 Difference]: Without dead ends: 3297 [2023-11-23 21:31:32,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:31:32,685 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:32,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 120 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:32,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2023-11-23 21:31:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 3297. [2023-11-23 21:31:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3297 states, 3165 states have (on average 3.736492890995261) internal successors, (11826), 3296 states have internal predecessors, (11826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:32,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3297 states to 3297 states and 11826 transitions. [2023-11-23 21:31:32,869 INFO L78 Accepts]: Start accepts. Automaton has 3297 states and 11826 transitions. Word has length 5 [2023-11-23 21:31:32,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:32,870 INFO L495 AbstractCegarLoop]: Abstraction has 3297 states and 11826 transitions. [2023-11-23 21:31:32,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:32,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3297 states and 11826 transitions. [2023-11-23 21:31:32,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:31:32,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:32,871 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1] [2023-11-23 21:31:32,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2023-11-23 21:31:33,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:33,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:33,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:33,473 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:33,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:33,474 INFO L85 PathProgramCache]: Analyzing trace with hash -314230505, now seen corresponding path program 2 times [2023-11-23 21:31:33,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:33,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156225059] [2023-11-23 21:31:33,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:31:33,475 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 [2023-11-23 21:31:33,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:33,476 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:33,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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 [2023-11-23 21:31:33,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:31:33,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:31:33,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:31:33,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:33,630 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 [2023-11-23 21:31:33,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,643 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 [2023-11-23 21:31:33,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,668 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 [2023-11-23 21:31:33,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,699 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 [2023-11-23 21:31:33,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,719 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 [2023-11-23 21:31:33,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,728 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 [2023-11-23 21:31:33,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,741 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 [2023-11-23 21:31:33,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,752 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 [2023-11-23 21:31:33,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,764 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 11 treesize of output 1 [2023-11-23 21:31:33,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,780 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 [2023-11-23 21:31:33,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,787 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 [2023-11-23 21:31:33,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,796 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:31:33,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,817 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 [2023-11-23 21:31:33,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,826 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 [2023-11-23 21:31:33,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,833 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 [2023-11-23 21:31:33,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,842 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 11 treesize of output 1 [2023-11-23 21:31:33,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,849 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 [2023-11-23 21:31:33,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,858 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 [2023-11-23 21:31:33,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,871 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 [2023-11-23 21:31:33,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,879 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 [2023-11-23 21:31:33,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,897 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 [2023-11-23 21:31:33,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,906 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 [2023-11-23 21:31:33,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,916 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 [2023-11-23 21:31:33,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:33,922 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 [2023-11-23 21:31:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:34,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:34,756 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:34,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156225059] [2023-11-23 21:31:34,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156225059] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:34,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [530433695] [2023-11-23 21:31:34,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:31:34,757 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:31:34,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:31:34,758 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:31:34,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2023-11-23 21:31:35,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:31:35,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:31:35,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:31:35,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:35,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:35,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [530433695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:35,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134492853] [2023-11-23 21:31:35,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:31:35,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:35,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:35,479 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:35,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:31:35,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:31:35,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:31:35,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:31:35,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:35,664 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 [2023-11-23 21:31:35,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,687 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 [2023-11-23 21:31:35,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,711 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 [2023-11-23 21:31:35,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,739 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 [2023-11-23 21:31:35,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,769 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 [2023-11-23 21:31:35,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,782 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 11 treesize of output 1 [2023-11-23 21:31:35,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,792 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 [2023-11-23 21:31:35,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,802 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 [2023-11-23 21:31:35,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,814 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 11 treesize of output 1 [2023-11-23 21:31:35,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,834 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 [2023-11-23 21:31:35,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,852 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 [2023-11-23 21:31:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,859 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 [2023-11-23 21:31:35,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,872 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 [2023-11-23 21:31:35,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,889 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 [2023-11-23 21:31:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,900 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 [2023-11-23 21:31:35,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,907 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 [2023-11-23 21:31:35,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,916 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 [2023-11-23 21:31:35,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,925 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 [2023-11-23 21:31:35,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,936 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 [2023-11-23 21:31:35,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,946 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 [2023-11-23 21:31:35,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,959 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 [2023-11-23 21:31:35,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,977 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 [2023-11-23 21:31:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,986 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 [2023-11-23 21:31:35,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:35,995 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 [2023-11-23 21:31:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:36,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:36,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134492853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:36,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:31:36,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 21 [2023-11-23 21:31:36,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519656566] [2023-11-23 21:31:36,592 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:36,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 21:31:36,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 21:31:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:31:36,594 INFO L87 Difference]: Start difference. First operand 3297 states and 11826 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:38,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:38,355 INFO L93 Difference]: Finished difference Result 3295 states and 11823 transitions. [2023-11-23 21:31:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:31:38,357 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 21:31:38,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:38,378 INFO L225 Difference]: With dead ends: 3295 [2023-11-23 21:31:38,379 INFO L226 Difference]: Without dead ends: 3295 [2023-11-23 21:31:38,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:31:38,380 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:38,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 210 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-23 21:31:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2023-11-23 21:31:38,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 3295. [2023-11-23 21:31:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3164 states have (on average 3.7367256637168142) internal successors, (11823), 3294 states have internal predecessors, (11823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 11823 transitions. [2023-11-23 21:31:38,518 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 11823 transitions. Word has length 9 [2023-11-23 21:31:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:38,519 INFO L495 AbstractCegarLoop]: Abstraction has 3295 states and 11823 transitions. [2023-11-23 21:31:38,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:38,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 11823 transitions. [2023-11-23 21:31:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:31:38,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:38,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2023-11-23 21:31:38,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:38,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:38,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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 [2023-11-23 21:31:39,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:39,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:39,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:39,124 INFO L85 PathProgramCache]: Analyzing trace with hash -314230427, now seen corresponding path program 2 times [2023-11-23 21:31:39,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:39,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50903735] [2023-11-23 21:31:39,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:31:39,125 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 [2023-11-23 21:31:39,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:39,127 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:39,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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 [2023-11-23 21:31:39,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 21:31:39,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:31:39,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:31:39,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:39,319 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:39,320 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 19 treesize of output 22 [2023-11-23 21:31:39,360 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-23 21:31:39,360 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 24 treesize of output 22 [2023-11-23 21:31:39,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:39,413 INFO L349 Elim1Store]: treesize reduction 60, result has 10.4 percent of original size [2023-11-23 21:31:39,414 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 1 case distinctions, treesize of input 38 treesize of output 29 [2023-11-23 21:31:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:39,454 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-23 21:31:39,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-11-23 21:31:39,486 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:39,487 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 19 treesize of output 22 [2023-11-23 21:31:39,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:39,525 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-23 21:31:39,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-11-23 21:31:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:40,085 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:40,085 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:40,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50903735] [2023-11-23 21:31:40,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50903735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:40,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:40,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:31:40,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646802153] [2023-11-23 21:31:40,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:40,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:40,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:40,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:40,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:40,089 INFO L87 Difference]: Start difference. First operand 3295 states and 11823 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:40,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:40,369 INFO L93 Difference]: Finished difference Result 2782 states and 9774 transitions. [2023-11-23 21:31:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:40,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 21:31:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:40,387 INFO L225 Difference]: With dead ends: 2782 [2023-11-23 21:31:40,388 INFO L226 Difference]: Without dead ends: 2782 [2023-11-23 21:31:40,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:40,389 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:40,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 13 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:31:40,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2782 states. [2023-11-23 21:31:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2782 to 2782. [2023-11-23 21:31:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2782 states, 2679 states have (on average 3.6483762597984324) internal successors, (9774), 2781 states have internal predecessors, (9774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2782 states to 2782 states and 9774 transitions. [2023-11-23 21:31:40,497 INFO L78 Accepts]: Start accepts. Automaton has 2782 states and 9774 transitions. Word has length 9 [2023-11-23 21:31:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:40,497 INFO L495 AbstractCegarLoop]: Abstraction has 2782 states and 9774 transitions. [2023-11-23 21:31:40,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2782 states and 9774 transitions. [2023-11-23 21:31:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:31:40,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:40,498 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2023-11-23 21:31:40,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:40,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:40,701 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:40,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:40,701 INFO L85 PathProgramCache]: Analyzing trace with hash -314230426, now seen corresponding path program 1 times [2023-11-23 21:31:40,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:40,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761842989] [2023-11-23 21:31:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:40,702 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 [2023-11-23 21:31:40,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:40,704 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:40,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-23 21:31:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:40,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 21:31:40,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:40,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:40,913 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-23 21:31:40,913 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 14 treesize of output 15 [2023-11-23 21:31:40,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-23 21:31:40,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:40,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:40,952 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 9 treesize of output 11 [2023-11-23 21:31:40,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:40,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 21:31:40,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:40,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:40,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:41,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-11-23 21:31:41,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:41,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:41,021 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 [2023-11-23 21:31:41,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:41,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:41,042 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 9 treesize of output 11 [2023-11-23 21:31:41,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:41,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 21:31:41,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:41,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:41,083 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 [2023-11-23 21:31:41,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:41,122 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-23 21:31:41,122 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 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-23 21:31:41,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:41,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:41,189 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-23 21:31:41,189 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 1 case distinctions, treesize of input 19 treesize of output 11 [2023-11-23 21:31:41,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:41,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-23 21:31:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:41,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:41,567 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:41,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761842989] [2023-11-23 21:31:41,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761842989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:41,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:41,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:31:41,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524757104] [2023-11-23 21:31:41,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:41,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:41,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:41,570 INFO L87 Difference]: Start difference. First operand 2782 states and 9774 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:41,831 INFO L93 Difference]: Finished difference Result 2269 states and 7725 transitions. [2023-11-23 21:31:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:41,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 21:31:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:41,844 INFO L225 Difference]: With dead ends: 2269 [2023-11-23 21:31:41,844 INFO L226 Difference]: Without dead ends: 2269 [2023-11-23 21:31:41,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:41,845 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:41,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 13 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2023-11-23 21:31:41,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2269. [2023-11-23 21:31:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2194 states have (on average 3.5209662716499546) internal successors, (7725), 2268 states have internal predecessors, (7725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 7725 transitions. [2023-11-23 21:31:41,929 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 7725 transitions. Word has length 9 [2023-11-23 21:31:41,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:41,929 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 7725 transitions. [2023-11-23 21:31:41,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 7725 transitions. [2023-11-23 21:31:41,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:31:41,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:41,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:41,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:42,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:42,134 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:42,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:42,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1790957695, now seen corresponding path program 1 times [2023-11-23 21:31:42,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:42,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291161597] [2023-11-23 21:31:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:42,135 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 [2023-11-23 21:31:42,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:42,136 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:42,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-23 21:31:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:42,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:31:42,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:42,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:42,332 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-23 21:31:42,332 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 24 treesize of output 22 [2023-11-23 21:31:42,360 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:42,361 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 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-23 21:31:42,400 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-23 21:31:42,401 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 22 treesize of output 22 [2023-11-23 21:31:42,424 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:42,425 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 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-23 21:31:42,452 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:42,453 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 19 treesize of output 22 [2023-11-23 21:31:42,489 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-23 21:31:42,489 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 24 treesize of output 22 [2023-11-23 21:31:42,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:42,527 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:42,527 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 24 treesize of output 22 [2023-11-23 21:31:42,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:42,579 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-23 21:31:42,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-23 21:31:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:43,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:43,228 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:43,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291161597] [2023-11-23 21:31:43,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291161597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:43,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:43,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:31:43,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186834121] [2023-11-23 21:31:43,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:43,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:43,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:43,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:43,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:43,230 INFO L87 Difference]: Start difference. First operand 2269 states and 7725 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2023-11-23 21:31:43,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:43,441 INFO L93 Difference]: Finished difference Result 2197 states and 7517 transitions. [2023-11-23 21:31:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:43,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 12 [2023-11-23 21:31:43,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:43,453 INFO L225 Difference]: With dead ends: 2197 [2023-11-23 21:31:43,453 INFO L226 Difference]: Without dead ends: 2197 [2023-11-23 21:31:43,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:43,454 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:43,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 11 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:43,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2023-11-23 21:31:43,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2197. [2023-11-23 21:31:43,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2197 states, 2134 states have (on average 3.5224929709465793) internal successors, (7517), 2196 states have internal predecessors, (7517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:43,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2197 states to 2197 states and 7517 transitions. [2023-11-23 21:31:43,525 INFO L78 Accepts]: Start accepts. Automaton has 2197 states and 7517 transitions. Word has length 12 [2023-11-23 21:31:43,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:43,525 INFO L495 AbstractCegarLoop]: Abstraction has 2197 states and 7517 transitions. [2023-11-23 21:31:43,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2023-11-23 21:31:43,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2197 states and 7517 transitions. [2023-11-23 21:31:43,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:31:43,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:43,527 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:43,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:43,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:43,730 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:43,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:43,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1790957696, now seen corresponding path program 1 times [2023-11-23 21:31:43,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:43,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715297718] [2023-11-23 21:31:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:43,731 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 [2023-11-23 21:31:43,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:43,732 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:43,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-23 21:31:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:43,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:31:43,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:43,903 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 9 treesize of output 11 [2023-11-23 21:31:43,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:43,939 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-23 21:31:43,939 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 14 treesize of output 15 [2023-11-23 21:31:43,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:43,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-23 21:31:43,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:43,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:43,996 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-23 21:31:43,997 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 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-23 21:31:44,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-23 21:31:44,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,022 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 9 treesize of output 11 [2023-11-23 21:31:44,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 21:31:44,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,060 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-23 21:31:44,061 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 9 treesize of output 11 [2023-11-23 21:31:44,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,105 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-23 21:31:44,106 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 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-23 21:31:44,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,171 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-23 21:31:44,172 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 1 case distinctions, treesize of input 19 treesize of output 11 [2023-11-23 21:31:44,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,185 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 [2023-11-23 21:31:44,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-11-23 21:31:44,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:44,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2023-11-23 21:31:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:44,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:44,597 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:44,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715297718] [2023-11-23 21:31:44,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715297718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:44,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:44,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:31:44,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405818159] [2023-11-23 21:31:44,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:44,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:44,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:44,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:44,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:44,600 INFO L87 Difference]: Start difference. First operand 2197 states and 7517 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2023-11-23 21:31:44,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:44,816 INFO L93 Difference]: Finished difference Result 2125 states and 7309 transitions. [2023-11-23 21:31:44,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:44,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 12 [2023-11-23 21:31:44,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:44,827 INFO L225 Difference]: With dead ends: 2125 [2023-11-23 21:31:44,828 INFO L226 Difference]: Without dead ends: 2125 [2023-11-23 21:31:44,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:44,829 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:44,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 11 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:44,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2023-11-23 21:31:44,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 2125. [2023-11-23 21:31:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2125 states, 2074 states have (on average 3.5241080038572807) internal successors, (7309), 2124 states have internal predecessors, (7309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 7309 transitions. [2023-11-23 21:31:44,901 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 7309 transitions. Word has length 12 [2023-11-23 21:31:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:44,902 INFO L495 AbstractCegarLoop]: Abstraction has 2125 states and 7309 transitions. [2023-11-23 21:31:44,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2023-11-23 21:31:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 7309 transitions. [2023-11-23 21:31:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:31:44,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:44,903 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:44,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:45,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:45,107 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:45,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:45,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1170978100, now seen corresponding path program 1 times [2023-11-23 21:31:45,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:45,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287375038] [2023-11-23 21:31:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:45,108 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 [2023-11-23 21:31:45,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:45,109 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:45,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-23 21:31:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:45,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:31:45,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:45,236 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 7 [2023-11-23 21:31:45,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,242 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 [2023-11-23 21:31:45,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,249 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 [2023-11-23 21:31:45,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,262 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 [2023-11-23 21:31:45,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,267 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 [2023-11-23 21:31:45,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,273 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 [2023-11-23 21:31:45,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,279 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 [2023-11-23 21:31:45,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,285 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 [2023-11-23 21:31:45,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,291 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 [2023-11-23 21:31:45,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,295 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 [2023-11-23 21:31:45,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,317 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 [2023-11-23 21:31:45,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,324 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 [2023-11-23 21:31:45,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,342 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 [2023-11-23 21:31:45,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,349 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 [2023-11-23 21:31:45,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,366 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 [2023-11-23 21:31:45,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,388 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 [2023-11-23 21:31:45,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,401 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 [2023-11-23 21:31:45,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,408 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 [2023-11-23 21:31:45,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,423 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 [2023-11-23 21:31:45,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,428 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 [2023-11-23 21:31:45,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,434 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 [2023-11-23 21:31:45,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,438 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 [2023-11-23 21:31:45,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,445 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 [2023-11-23 21:31:45,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:45,459 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 [2023-11-23 21:31:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:45,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:45,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:45,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287375038] [2023-11-23 21:31:45,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287375038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:45,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:45,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:31:45,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132514297] [2023-11-23 21:31:45,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:45,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:31:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:45,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:31:45,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:31:45,504 INFO L87 Difference]: Start difference. First operand 2125 states and 7309 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) [2023-11-23 21:31:45,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:45,753 INFO L93 Difference]: Finished difference Result 1490 states and 5074 transitions. [2023-11-23 21:31:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:31:45,754 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 14 [2023-11-23 21:31:45,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:45,760 INFO L225 Difference]: With dead ends: 1490 [2023-11-23 21:31:45,761 INFO L226 Difference]: Without dead ends: 1490 [2023-11-23 21:31:45,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:31:45,762 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:45,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 16 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:45,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2023-11-23 21:31:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1490. [2023-11-23 21:31:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1470 states have (on average 3.4517006802721086) internal successors, (5074), 1489 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 5074 transitions. [2023-11-23 21:31:45,813 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 5074 transitions. Word has length 14 [2023-11-23 21:31:45,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:45,814 INFO L495 AbstractCegarLoop]: Abstraction has 1490 states and 5074 transitions. [2023-11-23 21:31:45,814 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) [2023-11-23 21:31:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 5074 transitions. [2023-11-23 21:31:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:31:45,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:45,815 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:45,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:46,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:46,018 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:46,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:46,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1170978099, now seen corresponding path program 1 times [2023-11-23 21:31:46,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:46,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813019601] [2023-11-23 21:31:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:46,021 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 [2023-11-23 21:31:46,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:46,022 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:46,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-23 21:31:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:46,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:31:46,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:46,179 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 [2023-11-23 21:31:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,191 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 [2023-11-23 21:31:46,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,201 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 [2023-11-23 21:31:46,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,218 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 [2023-11-23 21:31:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,244 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 [2023-11-23 21:31:46,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,266 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 [2023-11-23 21:31:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,277 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 [2023-11-23 21:31:46,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,283 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 [2023-11-23 21:31:46,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,292 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 [2023-11-23 21:31:46,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,298 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 [2023-11-23 21:31:46,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,308 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 [2023-11-23 21:31:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,324 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 [2023-11-23 21:31:46,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,332 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 [2023-11-23 21:31:46,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,341 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 [2023-11-23 21:31:46,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,352 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 [2023-11-23 21:31:46,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,369 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 [2023-11-23 21:31:46,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,379 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 [2023-11-23 21:31:46,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,385 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 [2023-11-23 21:31:46,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,396 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 [2023-11-23 21:31:46,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,413 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 [2023-11-23 21:31:46,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,422 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 [2023-11-23 21:31:46,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,431 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 [2023-11-23 21:31:46,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,437 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 [2023-11-23 21:31:46,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:46,446 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 [2023-11-23 21:31:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:46,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:46,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:46,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813019601] [2023-11-23 21:31:46,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813019601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:46,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:46,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:46,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385898989] [2023-11-23 21:31:46,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:46,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:31:46,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:46,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:31:46,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:46,560 INFO L87 Difference]: Start difference. First operand 1490 states and 5074 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:47,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:47,032 INFO L93 Difference]: Finished difference Result 2600 states and 8838 transitions. [2023-11-23 21:31:47,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:31:47,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-23 21:31:47,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:47,046 INFO L225 Difference]: With dead ends: 2600 [2023-11-23 21:31:47,046 INFO L226 Difference]: Without dead ends: 2600 [2023-11-23 21:31:47,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:47,047 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:47,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 30 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:31:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2023-11-23 21:31:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2045. [2023-11-23 21:31:47,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2025 states have (on average 3.56) internal successors, (7209), 2044 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7209 transitions. [2023-11-23 21:31:47,123 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7209 transitions. Word has length 14 [2023-11-23 21:31:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:47,123 INFO L495 AbstractCegarLoop]: Abstraction has 2045 states and 7209 transitions. [2023-11-23 21:31:47,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7209 transitions. [2023-11-23 21:31:47,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:31:47,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:47,125 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:47,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:47,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:47,328 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:47,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1957120538, now seen corresponding path program 1 times [2023-11-23 21:31:47,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:47,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945158486] [2023-11-23 21:31:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:47,329 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 [2023-11-23 21:31:47,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:47,331 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:47,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-23 21:31:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:47,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:31:47,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:47,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,551 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 11 treesize of output 5 [2023-11-23 21:31:47,560 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:47,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,579 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,595 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 [2023-11-23 21:31:47,599 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:47,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,620 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 [2023-11-23 21:31:47,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,629 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:47,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,638 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:47,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,653 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:47,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,668 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 [2023-11-23 21:31:47,677 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:47,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:47,699 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 [2023-11-23 21:31:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:47,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:47,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:47,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945158486] [2023-11-23 21:31:47,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945158486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:47,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:47,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:31:47,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045548333] [2023-11-23 21:31:47,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:47,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:47,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:47,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:47,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:47,784 INFO L87 Difference]: Start difference. First operand 2045 states and 7209 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:47,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:47,957 INFO L93 Difference]: Finished difference Result 1968 states and 6978 transitions. [2023-11-23 21:31:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:47,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-23 21:31:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:47,968 INFO L225 Difference]: With dead ends: 1968 [2023-11-23 21:31:47,969 INFO L226 Difference]: Without dead ends: 1968 [2023-11-23 21:31:47,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:47,970 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:47,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 6 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2023-11-23 21:31:48,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1968. [2023-11-23 21:31:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1954 states have (on average 3.571136131013306) internal successors, (6978), 1967 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 6978 transitions. [2023-11-23 21:31:48,033 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 6978 transitions. Word has length 15 [2023-11-23 21:31:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:48,034 INFO L495 AbstractCegarLoop]: Abstraction has 1968 states and 6978 transitions. [2023-11-23 21:31:48,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 6978 transitions. [2023-11-23 21:31:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:31:48,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:48,035 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:48,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-11-23 21:31:48,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:48,239 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:48,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:48,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1957120539, now seen corresponding path program 1 times [2023-11-23 21:31:48,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:48,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824066664] [2023-11-23 21:31:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:48,241 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 [2023-11-23 21:31:48,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:48,242 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:48,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-23 21:31:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:48,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:31:48,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:48,468 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:48,469 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 14 treesize of output 15 [2023-11-23 21:31:48,507 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:48,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-23 21:31:48,537 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:48,537 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 14 treesize of output 15 [2023-11-23 21:31:48,568 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:48,568 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 14 treesize of output 15 [2023-11-23 21:31:48,589 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:48,589 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-23 21:31:48,611 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:48,611 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-23 21:31:48,634 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:48,634 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-23 21:31:48,664 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:48,665 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 14 treesize of output 15 [2023-11-23 21:31:48,683 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:48,683 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-23 21:31:48,702 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:48,702 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-23 21:31:48,736 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:48,737 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 14 treesize of output 15 [2023-11-23 21:31:48,765 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:48,765 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-23 21:31:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:49,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:49,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:49,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824066664] [2023-11-23 21:31:49,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824066664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:49,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:49,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:31:49,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919332606] [2023-11-23 21:31:49,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:49,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:49,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:49,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:49,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:49,070 INFO L87 Difference]: Start difference. First operand 1968 states and 6978 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:49,236 INFO L93 Difference]: Finished difference Result 1891 states and 6747 transitions. [2023-11-23 21:31:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:49,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-23 21:31:49,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:49,243 INFO L225 Difference]: With dead ends: 1891 [2023-11-23 21:31:49,243 INFO L226 Difference]: Without dead ends: 1891 [2023-11-23 21:31:49,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:49,244 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:49,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 9 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:49,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2023-11-23 21:31:49,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1891. [2023-11-23 21:31:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1883 states have (on average 3.5831120552310143) internal successors, (6747), 1890 states have internal predecessors, (6747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 6747 transitions. [2023-11-23 21:31:49,301 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 6747 transitions. Word has length 15 [2023-11-23 21:31:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:49,301 INFO L495 AbstractCegarLoop]: Abstraction has 1891 states and 6747 transitions. [2023-11-23 21:31:49,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 6747 transitions. [2023-11-23 21:31:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:31:49,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:49,303 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:49,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:49,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:49,507 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:49,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash 404726839, now seen corresponding path program 1 times [2023-11-23 21:31:49,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:49,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961806425] [2023-11-23 21:31:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:49,509 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 [2023-11-23 21:31:49,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:49,510 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:49,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-23 21:31:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:49,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:31:49,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:49,668 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 [2023-11-23 21:31:49,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,675 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 [2023-11-23 21:31:49,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,684 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 11 treesize of output 1 [2023-11-23 21:31:49,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,699 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 [2023-11-23 21:31:49,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,705 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 [2023-11-23 21:31:49,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,711 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 [2023-11-23 21:31:49,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,733 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 [2023-11-23 21:31:49,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,749 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 [2023-11-23 21:31:49,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,766 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 [2023-11-23 21:31:49,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,773 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 [2023-11-23 21:31:49,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,796 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 [2023-11-23 21:31:49,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,823 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 [2023-11-23 21:31:49,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,831 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 [2023-11-23 21:31:49,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,840 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 [2023-11-23 21:31:49,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,849 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 [2023-11-23 21:31:49,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,867 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 [2023-11-23 21:31:49,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,876 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 11 treesize of output 1 [2023-11-23 21:31:49,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,881 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 [2023-11-23 21:31:49,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,891 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 [2023-11-23 21:31:49,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,897 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 [2023-11-23 21:31:49,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,905 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 [2023-11-23 21:31:49,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,911 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 [2023-11-23 21:31:49,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,928 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 [2023-11-23 21:31:49,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:49,936 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 [2023-11-23 21:31:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:50,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:50,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:50,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961806425] [2023-11-23 21:31:50,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961806425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:50,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:50,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:50,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707907412] [2023-11-23 21:31:50,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:50,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:31:50,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:50,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:31:50,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:50,068 INFO L87 Difference]: Start difference. First operand 1891 states and 6747 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:50,422 INFO L93 Difference]: Finished difference Result 3220 states and 11527 transitions. [2023-11-23 21:31:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:31:50,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-23 21:31:50,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:50,433 INFO L225 Difference]: With dead ends: 3220 [2023-11-23 21:31:50,433 INFO L226 Difference]: Without dead ends: 3220 [2023-11-23 21:31:50,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:50,434 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 73 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:50,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 24 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:31:50,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2023-11-23 21:31:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2674. [2023-11-23 21:31:50,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2666 states have (on average 3.694298574643661) internal successors, (9849), 2673 states have internal predecessors, (9849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 9849 transitions. [2023-11-23 21:31:50,521 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 9849 transitions. Word has length 17 [2023-11-23 21:31:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:50,522 INFO L495 AbstractCegarLoop]: Abstraction has 2674 states and 9849 transitions. [2023-11-23 21:31:50,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:50,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 9849 transitions. [2023-11-23 21:31:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:31:50,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:50,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:50,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:50,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:50,727 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:50,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:50,727 INFO L85 PathProgramCache]: Analyzing trace with hash -883231705, now seen corresponding path program 1 times [2023-11-23 21:31:50,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:50,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041807188] [2023-11-23 21:31:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:50,728 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 [2023-11-23 21:31:50,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:50,729 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:50,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-23 21:31:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:50,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:31:50,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:50,893 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 [2023-11-23 21:31:50,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,909 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 [2023-11-23 21:31:50,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,916 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 [2023-11-23 21:31:50,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,921 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 [2023-11-23 21:31:50,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,928 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 [2023-11-23 21:31:50,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,936 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 [2023-11-23 21:31:50,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,945 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 [2023-11-23 21:31:50,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,950 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 [2023-11-23 21:31:50,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,959 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 [2023-11-23 21:31:50,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,975 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 [2023-11-23 21:31:50,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,982 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 [2023-11-23 21:31:50,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,990 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 [2023-11-23 21:31:50,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,999 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 [2023-11-23 21:31:51,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,005 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 [2023-11-23 21:31:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,021 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 [2023-11-23 21:31:51,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,036 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 [2023-11-23 21:31:51,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,041 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 [2023-11-23 21:31:51,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,048 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 [2023-11-23 21:31:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,067 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 [2023-11-23 21:31:51,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,094 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 [2023-11-23 21:31:51,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,112 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 [2023-11-23 21:31:51,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,119 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 [2023-11-23 21:31:51,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,128 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 [2023-11-23 21:31:51,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,142 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 [2023-11-23 21:31:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:51,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:51,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:51,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041807188] [2023-11-23 21:31:51,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041807188] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:51,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [807388727] [2023-11-23 21:31:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:51,636 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:31:51,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:31:51,637 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:31:51,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2023-11-23 21:31:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:51,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:31:51,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:51,901 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 5 [2023-11-23 21:31:51,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,910 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 [2023-11-23 21:31:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,916 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 [2023-11-23 21:31:51,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,923 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 [2023-11-23 21:31:51,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,937 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 [2023-11-23 21:31:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,968 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 [2023-11-23 21:31:51,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:51,991 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 [2023-11-23 21:31:51,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,000 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 [2023-11-23 21:31:52,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,021 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 [2023-11-23 21:31:52,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,043 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 [2023-11-23 21:31:52,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,052 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 [2023-11-23 21:31:52,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,069 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 [2023-11-23 21:31:52,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,085 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 [2023-11-23 21:31:52,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,095 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 [2023-11-23 21:31:52,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,102 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 [2023-11-23 21:31:52,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,109 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 [2023-11-23 21:31:52,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,119 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 [2023-11-23 21:31:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,123 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 [2023-11-23 21:31:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,139 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 [2023-11-23 21:31:52,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,146 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 [2023-11-23 21:31:52,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,154 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 [2023-11-23 21:31:52,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,160 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 [2023-11-23 21:31:52,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,165 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 [2023-11-23 21:31:52,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,172 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 [2023-11-23 21:31:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:52,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:52,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [807388727] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:52,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123020915] [2023-11-23 21:31:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:52,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:52,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:52,461 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:52,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-23 21:31:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:52,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:31:52,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:52,623 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 [2023-11-23 21:31:52,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,638 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 11 treesize of output 1 [2023-11-23 21:31:52,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,644 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 6 treesize of output 1 [2023-11-23 21:31:52,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,652 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 [2023-11-23 21:31:52,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,660 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 [2023-11-23 21:31:52,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,665 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 [2023-11-23 21:31:52,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,677 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 [2023-11-23 21:31:52,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,684 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 11 treesize of output 1 [2023-11-23 21:31:52,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,701 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 [2023-11-23 21:31:52,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,709 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 [2023-11-23 21:31:52,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,716 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 [2023-11-23 21:31:52,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,724 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 [2023-11-23 21:31:52,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,734 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 [2023-11-23 21:31:52,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,739 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 [2023-11-23 21:31:52,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,745 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 [2023-11-23 21:31:52,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,753 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 [2023-11-23 21:31:52,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,762 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 [2023-11-23 21:31:52,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,777 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 [2023-11-23 21:31:52,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,788 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 [2023-11-23 21:31:52,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,804 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 [2023-11-23 21:31:52,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,816 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 [2023-11-23 21:31:52,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,832 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 [2023-11-23 21:31:52,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,858 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 [2023-11-23 21:31:52,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,888 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 [2023-11-23 21:31:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:52,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:53,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123020915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:53,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:31:53,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2023-11-23 21:31:53,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970698524] [2023-11-23 21:31:53,161 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:53,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:31:53,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:53,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:31:53,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:31:53,162 INFO L87 Difference]: Start difference. First operand 2674 states and 9849 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:54,427 INFO L93 Difference]: Finished difference Result 6292 states and 22374 transitions. [2023-11-23 21:31:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:31:54,428 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-23 21:31:54,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:54,446 INFO L225 Difference]: With dead ends: 6292 [2023-11-23 21:31:54,446 INFO L226 Difference]: Without dead ends: 6292 [2023-11-23 21:31:54,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:31:54,447 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 305 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:54,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 68 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 21:31:54,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6292 states. [2023-11-23 21:31:54,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6292 to 4132. [2023-11-23 21:31:54,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4132 states, 4124 states have (on average 3.800921435499515) internal successors, (15675), 4131 states have internal predecessors, (15675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:54,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 15675 transitions. [2023-11-23 21:31:54,601 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 15675 transitions. Word has length 17 [2023-11-23 21:31:54,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:54,601 INFO L495 AbstractCegarLoop]: Abstraction has 4132 states and 15675 transitions. [2023-11-23 21:31:54,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 15675 transitions. [2023-11-23 21:31:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:31:54,603 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:54,603 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:54,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:54,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2023-11-23 21:31:55,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:55,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:55,207 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:55,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:55,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1245007206, now seen corresponding path program 1 times [2023-11-23 21:31:55,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:55,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837832495] [2023-11-23 21:31:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:55,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:55,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:55,209 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:55,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-23 21:31:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:55,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:31:55,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:55,367 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 [2023-11-23 21:31:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,384 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 [2023-11-23 21:31:55,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,389 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 [2023-11-23 21:31:55,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,396 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 [2023-11-23 21:31:55,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,407 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 [2023-11-23 21:31:55,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,417 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 [2023-11-23 21:31:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,424 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 [2023-11-23 21:31:55,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,430 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 [2023-11-23 21:31:55,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,441 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 [2023-11-23 21:31:55,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,458 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 16 treesize of output 1 [2023-11-23 21:31:55,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,464 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 [2023-11-23 21:31:55,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,473 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 [2023-11-23 21:31:55,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,507 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 [2023-11-23 21:31:55,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,527 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 [2023-11-23 21:31:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,538 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 [2023-11-23 21:31:55,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,555 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 [2023-11-23 21:31:55,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,577 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 [2023-11-23 21:31:55,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,585 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 [2023-11-23 21:31:55,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,605 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 [2023-11-23 21:31:55,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,614 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 [2023-11-23 21:31:55,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,622 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 [2023-11-23 21:31:55,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,665 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 [2023-11-23 21:31:55,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,671 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 [2023-11-23 21:31:55,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,678 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 [2023-11-23 21:31:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:55,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:56,204 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:56,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837832495] [2023-11-23 21:31:56,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837832495] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:56,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [242270160] [2023-11-23 21:31:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:56,205 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:31:56,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:31:56,206 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:31:56,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-11-23 21:31:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:56,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:31:56,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:56,487 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 5 [2023-11-23 21:31:56,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,496 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 [2023-11-23 21:31:56,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,511 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 [2023-11-23 21:31:56,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,519 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 [2023-11-23 21:31:56,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,527 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 [2023-11-23 21:31:56,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,533 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 [2023-11-23 21:31:56,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,542 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 [2023-11-23 21:31:56,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,548 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 [2023-11-23 21:31:56,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,556 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 [2023-11-23 21:31:56,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,560 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 [2023-11-23 21:31:56,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,574 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 [2023-11-23 21:31:56,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,580 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 [2023-11-23 21:31:56,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,594 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 11 treesize of output 1 [2023-11-23 21:31:56,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,606 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 [2023-11-23 21:31:56,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,615 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 [2023-11-23 21:31:56,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,628 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 [2023-11-23 21:31:56,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,656 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 [2023-11-23 21:31:56,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,671 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 [2023-11-23 21:31:56,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,678 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 [2023-11-23 21:31:56,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,686 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 [2023-11-23 21:31:56,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,694 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 [2023-11-23 21:31:56,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,700 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 [2023-11-23 21:31:56,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,709 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 [2023-11-23 21:31:56,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,724 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 [2023-11-23 21:31:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:56,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:56,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [242270160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:56,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134721034] [2023-11-23 21:31:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:56,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:56,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:57,000 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:57,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-23 21:31:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:57,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:31:57,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:57,164 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 [2023-11-23 21:31:57,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,181 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 [2023-11-23 21:31:57,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,199 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 [2023-11-23 21:31:57,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,224 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 [2023-11-23 21:31:57,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,241 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 [2023-11-23 21:31:57,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,249 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 [2023-11-23 21:31:57,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,259 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 [2023-11-23 21:31:57,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,264 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 [2023-11-23 21:31:57,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,272 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 11 treesize of output 1 [2023-11-23 21:31:57,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,276 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 [2023-11-23 21:31:57,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,292 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 16 treesize of output 1 [2023-11-23 21:31:57,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,299 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 [2023-11-23 21:31:57,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,308 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 [2023-11-23 21:31:57,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,312 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 [2023-11-23 21:31:57,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,320 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 11 treesize of output 1 [2023-11-23 21:31:57,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,334 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 [2023-11-23 21:31:57,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,341 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 [2023-11-23 21:31:57,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,346 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 [2023-11-23 21:31:57,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,353 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 [2023-11-23 21:31:57,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,358 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 [2023-11-23 21:31:57,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,367 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 [2023-11-23 21:31:57,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,382 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 [2023-11-23 21:31:57,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,389 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 [2023-11-23 21:31:57,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:57,394 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 [2023-11-23 21:31:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:57,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:31:57,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134721034] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:57,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:31:57,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2023-11-23 21:31:57,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818337901] [2023-11-23 21:31:57,678 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:57,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:31:57,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:57,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:31:57,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:31:57,679 INFO L87 Difference]: Start difference. First operand 4132 states and 15675 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:58,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:58,862 INFO L93 Difference]: Finished difference Result 9064 states and 33537 transitions. [2023-11-23 21:31:58,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:31:58,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-23 21:31:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:58,901 INFO L225 Difference]: With dead ends: 9064 [2023-11-23 21:31:58,902 INFO L226 Difference]: Without dead ends: 9064 [2023-11-23 21:31:58,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:31:58,903 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 288 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:58,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 72 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 21:31:58,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2023-11-23 21:31:59,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 6562. [2023-11-23 21:31:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6562 states, 6554 states have (on average 3.8985352456515106) internal successors, (25551), 6561 states have internal predecessors, (25551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6562 states to 6562 states and 25551 transitions. [2023-11-23 21:31:59,274 INFO L78 Accepts]: Start accepts. Automaton has 6562 states and 25551 transitions. Word has length 20 [2023-11-23 21:31:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:59,275 INFO L495 AbstractCegarLoop]: Abstraction has 6562 states and 25551 transitions. [2023-11-23 21:31:59,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:59,276 INFO L276 IsEmpty]: Start isEmpty. Operand 6562 states and 25551 transitions. [2023-11-23 21:31:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:31:59,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:59,278 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:59,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:59,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-23 21:31:59,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:59,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:59,879 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:31:59,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:59,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1669284303, now seen corresponding path program 1 times [2023-11-23 21:31:59,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:59,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198367995] [2023-11-23 21:31:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:59,881 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 [2023-11-23 21:31:59,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:59,882 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:31:59,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-11-23 21:32:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:00,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:32:00,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:32:00,054 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 5 [2023-11-23 21:32:00,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,063 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 [2023-11-23 21:32:00,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,068 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 [2023-11-23 21:32:00,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,075 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 [2023-11-23 21:32:00,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,083 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 [2023-11-23 21:32:00,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,097 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 [2023-11-23 21:32:00,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,128 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 [2023-11-23 21:32:00,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,145 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 [2023-11-23 21:32:00,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,158 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 [2023-11-23 21:32:00,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,175 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 [2023-11-23 21:32:00,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,185 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 [2023-11-23 21:32:00,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,199 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 [2023-11-23 21:32:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,209 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 [2023-11-23 21:32:00,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,224 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 [2023-11-23 21:32:00,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,232 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 [2023-11-23 21:32:00,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,236 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 [2023-11-23 21:32:00,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,241 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 [2023-11-23 21:32:00,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,247 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 [2023-11-23 21:32:00,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,262 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 [2023-11-23 21:32:00,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,269 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 [2023-11-23 21:32:00,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,276 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 [2023-11-23 21:32:00,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,281 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 [2023-11-23 21:32:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,286 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 [2023-11-23 21:32:00,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:00,292 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 [2023-11-23 21:32:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:32:00,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:32:00,423 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:32:00,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198367995] [2023-11-23 21:32:00,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198367995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:00,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:00,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:32:00,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013218315] [2023-11-23 21:32:00,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:00,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:32:00,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:32:00,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:32:00,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:32:00,424 INFO L87 Difference]: Start difference. First operand 6562 states and 25551 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:32:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:00,841 INFO L93 Difference]: Finished difference Result 10660 states and 41869 transitions. [2023-11-23 21:32:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:32:00,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-23 21:32:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:00,891 INFO L225 Difference]: With dead ends: 10660 [2023-11-23 21:32:00,891 INFO L226 Difference]: Without dead ends: 10660 [2023-11-23 21:32:00,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:32:00,892 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:00,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 26 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:32:00,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10660 states. [2023-11-23 21:32:01,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10660 to 9019. [2023-11-23 21:32:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9019 states, 9011 states have (on average 4.012762179558318) internal successors, (36159), 9018 states have internal predecessors, (36159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:32:01,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9019 states to 9019 states and 36159 transitions. [2023-11-23 21:32:01,328 INFO L78 Accepts]: Start accepts. Automaton has 9019 states and 36159 transitions. Word has length 20 [2023-11-23 21:32:01,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:01,329 INFO L495 AbstractCegarLoop]: Abstraction has 9019 states and 36159 transitions. [2023-11-23 21:32:01,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:32:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 9019 states and 36159 transitions. [2023-11-23 21:32:01,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:32:01,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:01,334 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:32:01,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-11-23 21:32:01,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:32:01,537 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-23 21:32:01,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:01,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1776694345, now seen corresponding path program 1 times [2023-11-23 21:32:01,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:32:01,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936907478] [2023-11-23 21:32:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:01,538 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 [2023-11-23 21:32:01,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:32:01,541 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -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) [2023-11-23 21:32:01,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-11-23 21:32:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:01,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:32:01,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:32:01,718 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 [2023-11-23 21:32:01,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,727 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 [2023-11-23 21:32:01,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,734 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 [2023-11-23 21:32:01,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,738 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 [2023-11-23 21:32:01,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,745 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 [2023-11-23 21:32:01,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,749 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 [2023-11-23 21:32:01,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,765 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 [2023-11-23 21:32:01,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,774 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 [2023-11-23 21:32:01,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,784 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 [2023-11-23 21:32:01,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,800 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 [2023-11-23 21:32:01,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,829 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 [2023-11-23 21:32:01,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,845 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 [2023-11-23 21:32:01,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,854 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 11 treesize of output 1 [2023-11-23 21:32:01,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,860 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 [2023-11-23 21:32:01,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,866 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 [2023-11-23 21:32:01,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,873 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 [2023-11-23 21:32:01,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,889 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 [2023-11-23 21:32:01,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,897 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 [2023-11-23 21:32:01,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,907 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 [2023-11-23 21:32:01,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,922 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 [2023-11-23 21:32:01,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,928 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 [2023-11-23 21:32:01,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,936 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 [2023-11-23 21:32:01,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,944 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 [2023-11-23 21:32:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:01,949 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 [2023-11-23 21:32:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:32:02,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:32:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:32:02,469 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:32:02,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936907478] [2023-11-23 21:32:02,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936907478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:32:02,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1562701868] [2023-11-23 21:32:02,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:02,470 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:32:02,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:32:02,471 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:32:02,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2023-11-23 21:32:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:02,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:32:02,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:32:02,793 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 5 [2023-11-23 21:32:02,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,803 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 [2023-11-23 21:32:02,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,813 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 [2023-11-23 21:32:02,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,829 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 [2023-11-23 21:32:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,837 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 [2023-11-23 21:32:02,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,842 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 [2023-11-23 21:32:02,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,854 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 11 treesize of output 1 [2023-11-23 21:32:02,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,870 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 [2023-11-23 21:32:02,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,887 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 [2023-11-23 21:32:02,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,896 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 [2023-11-23 21:32:02,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,923 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 [2023-11-23 21:32:02,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,939 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 [2023-11-23 21:32:02,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,953 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 [2023-11-23 21:32:02,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,967 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 [2023-11-23 21:32:02,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,975 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 [2023-11-23 21:32:02,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,980 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 [2023-11-23 21:32:02,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,985 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 [2023-11-23 21:32:02,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:02,992 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 [2023-11-23 21:32:03,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,002 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 [2023-11-23 21:32:03,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,018 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 [2023-11-23 21:32:03,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,023 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 [2023-11-23 21:32:03,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,030 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 [2023-11-23 21:32:03,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,040 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 [2023-11-23 21:32:03,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,052 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 [2023-11-23 21:32:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:32:03,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:32:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:32:03,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1562701868] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:32:03,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069713830] [2023-11-23 21:32:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:03,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:32:03,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:32:03,396 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:32:03,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d6e3274-ce3a-4a60-9e22-65c97ade58b1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-23 21:32:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:03,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:32:03,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:32:03,577 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 [2023-11-23 21:32:03,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,591 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 16 treesize of output 1 [2023-11-23 21:32:03,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,601 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 [2023-11-23 21:32:03,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,605 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 6 treesize of output 1 [2023-11-23 21:32:03,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,610 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 [2023-11-23 21:32:03,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,616 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 [2023-11-23 21:32:03,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,630 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 [2023-11-23 21:32:03,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,636 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 [2023-11-23 21:32:03,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,651 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 [2023-11-23 21:32:03,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,659 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 [2023-11-23 21:32:03,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,666 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 [2023-11-23 21:32:03,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,672 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 [2023-11-23 21:32:03,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,680 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 [2023-11-23 21:32:03,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,693 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 [2023-11-23 21:32:03,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,698 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 [2023-11-23 21:32:03,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,704 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 [2023-11-23 21:32:03,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,714 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 [2023-11-23 21:32:03,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,719 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 6 treesize of output 1 [2023-11-23 21:32:03,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,747 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 [2023-11-23 21:32:03,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,763 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 [2023-11-23 21:32:03,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,781 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 16 treesize of output 1 [2023-11-23 21:32:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,789 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 [2023-11-23 21:32:03,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,798 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 [2023-11-23 21:32:03,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,813 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 [2023-11-23 21:32:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:32:03,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:32:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:32:04,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069713830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:32:04,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:32:04,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2023-11-23 21:32:04,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256981557] [2023-11-23 21:32:04,120 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:32:04,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:32:04,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:32:04,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:32:04,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:32:04,122 INFO L87 Difference]: Start difference. First operand 9019 states and 36159 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)