./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:44:06,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:44:06,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:44:06,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:44:06,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:44:06,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:44:06,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:44:06,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:44:06,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:44:06,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:44:06,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:44:06,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:44:06,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:44:06,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:44:06,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:44:06,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:44:06,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:44:06,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:44:06,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:44:06,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:44:06,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:44:06,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:44:06,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:44:06,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:44:06,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:44:06,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:44:06,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:44:06,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:44:06,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:44:06,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:44:06,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:44:06,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:44:06,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:44:06,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:44:06,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:44:06,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:44:06,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:44:06,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:44:06,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:44:06,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:44:06,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:44:06,539 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 18:44:06,566 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:44:06,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:44:06,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:44:06,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:44:06,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:44:06,571 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:44:06,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:44:06,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:44:06,573 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:44:06,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:44:06,574 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:44:06,575 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 18:44:06,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:44:06,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:44:06,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:44:06,576 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 18:44:06,576 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 18:44:06,576 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 18:44:06,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:44:06,577 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 18:44:06,577 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:44:06,577 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:44:06,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:44:06,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:44:06,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:44:06,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:44:06,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:44:06,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:44:06,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:44:06,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:44:06,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-11-18 18:44:06,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:44:07,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:44:07,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:44:07,021 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:44:07,022 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:44:07,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-11-18 18:44:07,110 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/data/fb53949fa/39da29de95bf45c099ece57266b61e17/FLAGfc174b75f [2022-11-18 18:44:07,691 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:44:07,692 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-11-18 18:44:07,701 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/data/fb53949fa/39da29de95bf45c099ece57266b61e17/FLAGfc174b75f [2022-11-18 18:44:08,029 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/data/fb53949fa/39da29de95bf45c099ece57266b61e17 [2022-11-18 18:44:08,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:44:08,034 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:44:08,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:44:08,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:44:08,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:44:08,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:44:08" (1/1) ... [2022-11-18 18:44:08,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1465900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:08, skipping insertion in model container [2022-11-18 18:44:08,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:44:08" (1/1) ... [2022-11-18 18:44:08,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:44:08,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:44:08,334 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-11-18 18:44:08,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:44:08,358 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-18 18:44:08,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5cc8286b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:08, skipping insertion in model container [2022-11-18 18:44:08,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:44:08,360 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-18 18:44:08,362 INFO L158 Benchmark]: Toolchain (without parser) took 326.87ms. Allocated memory is still 125.8MB. Free memory was 86.2MB in the beginning and 101.6MB in the end (delta: -15.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-18 18:44:08,363 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 125.8MB. Free memory is still 102.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 18:44:08,365 INFO L158 Benchmark]: CACSL2BoogieTranslator took 312.68ms. Allocated memory is still 125.8MB. Free memory was 86.0MB in the beginning and 101.6MB in the end (delta: -15.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-18 18:44:08,367 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 125.8MB. Free memory is still 102.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 312.68ms. Allocated memory is still 125.8MB. Free memory was 86.0MB in the beginning and 101.6MB in the end (delta: -15.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:44:10,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:44:10,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:44:10,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:44:10,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:44:10,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:44:10,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:44:10,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:44:10,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:44:10,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:44:10,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:44:10,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:44:10,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:44:10,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:44:10,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:44:10,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:44:10,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:44:10,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:44:10,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:44:10,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:44:10,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:44:10,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:44:10,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:44:10,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:44:10,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:44:10,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:44:10,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:44:10,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:44:10,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:44:10,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:44:10,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:44:11,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:44:11,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:44:11,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:44:11,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:44:11,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:44:11,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:44:11,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:44:11,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:44:11,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:44:11,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:44:11,012 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-18 18:44:11,041 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:44:11,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:44:11,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:44:11,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:44:11,043 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:44:11,044 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:44:11,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:44:11,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:44:11,045 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:44:11,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:44:11,046 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:44:11,047 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 18:44:11,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:44:11,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:44:11,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:44:11,048 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 18:44:11,049 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 18:44:11,049 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 18:44:11,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:44:11,050 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 18:44:11,050 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 18:44:11,051 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 18:44:11,051 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:44:11,051 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:44:11,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:44:11,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:44:11,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:44:11,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:44:11,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:44:11,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:44:11,054 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 18:44:11,055 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 18:44:11,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 18:44:11,056 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-11-18 18:44:11,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:44:11,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:44:11,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:44:11,586 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:44:11,590 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:44:11,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-11-18 18:44:11,687 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/data/c28e8bd92/3f160fa5780a4032bc31f18a7c3e6db9/FLAG95a89254f [2022-11-18 18:44:12,399 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:44:12,401 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-11-18 18:44:12,412 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/data/c28e8bd92/3f160fa5780a4032bc31f18a7c3e6db9/FLAG95a89254f [2022-11-18 18:44:12,439 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/data/c28e8bd92/3f160fa5780a4032bc31f18a7c3e6db9 [2022-11-18 18:44:12,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:44:12,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:44:12,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:44:12,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:44:12,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:44:12,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:44:12" (1/1) ... [2022-11-18 18:44:12,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6560e6b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12, skipping insertion in model container [2022-11-18 18:44:12,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:44:12" (1/1) ... [2022-11-18 18:44:12,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:44:12,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:44:12,791 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-11-18 18:44:12,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:44:12,839 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-18 18:44:12,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:44:12,858 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-11-18 18:44:12,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:44:12,867 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:44:12,895 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-11-18 18:44:12,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:44:12,919 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:44:12,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12 WrapperNode [2022-11-18 18:44:12,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:44:12,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:44:12,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:44:12,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:44:12,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12" (1/1) ... [2022-11-18 18:44:12,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12" (1/1) ... [2022-11-18 18:44:12,986 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 99 [2022-11-18 18:44:12,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:44:12,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:44:12,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:44:12,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:44:13,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12" (1/1) ... [2022-11-18 18:44:13,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12" (1/1) ... [2022-11-18 18:44:13,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12" (1/1) ... [2022-11-18 18:44:13,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12" (1/1) ... [2022-11-18 18:44:13,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12" (1/1) ... [2022-11-18 18:44:13,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12" (1/1) ... [2022-11-18 18:44:13,063 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12" (1/1) ... [2022-11-18 18:44:13,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12" (1/1) ... [2022-11-18 18:44:13,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:44:13,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:44:13,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:44:13,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:44:13,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12" (1/1) ... [2022-11-18 18:44:13,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:44:13,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:13,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:44:13,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:44:13,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:44:13,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 18:44:13,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:44:13,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-18 18:44:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 18:44:13,200 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 18:44:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 18:44:13,200 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 18:44:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 18:44:13,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 18:44:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 18:44:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 18:44:13,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 18:44:13,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:44:13,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:44:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:44:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-18 18:44:13,206 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:44:13,444 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:44:13,447 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:44:14,219 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:44:14,464 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:44:14,464 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 18:44:14,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:44:14 BoogieIcfgContainer [2022-11-18 18:44:14,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:44:14,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:44:14,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:44:14,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:44:14,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:44:12" (1/3) ... [2022-11-18 18:44:14,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354a1de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:44:14, skipping insertion in model container [2022-11-18 18:44:14,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:12" (2/3) ... [2022-11-18 18:44:14,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354a1de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:44:14, skipping insertion in model container [2022-11-18 18:44:14,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:44:14" (3/3) ... [2022-11-18 18:44:14,475 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2022-11-18 18:44:14,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:44:14,499 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-18 18:44:14,499 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:44:14,613 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 18:44:14,657 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 18:44:14,675 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 181 transitions, 386 flow [2022-11-18 18:44:14,679 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 181 transitions, 386 flow [2022-11-18 18:44:14,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 181 transitions, 386 flow [2022-11-18 18:44:14,815 INFO L130 PetriNetUnfolder]: 12/178 cut-off events. [2022-11-18 18:44:14,816 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 18:44:14,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 178 events. 12/178 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2022-11-18 18:44:14,828 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-11-18 18:44:51,498 INFO L134 LiptonReduction]: Checked pairs total: 3576 [2022-11-18 18:44:51,499 INFO L136 LiptonReduction]: Total number of compositions: 178 [2022-11-18 18:44:51,510 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2022-11-18 18:44:51,680 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:51,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:44:51,719 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;@7f05b717, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:44:51,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-11-18 18:44:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 18:44:51,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:51,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 18:44:51,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:44:51,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:51,744 INFO L85 PathProgramCache]: Analyzing trace with hash 23267, now seen corresponding path program 1 times [2022-11-18 18:44:51,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:44:51,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720666786] [2022-11-18 18:44:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:51,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:44:51,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:44:51,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:44:51,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-18 18:44:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:51,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:44:51,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:52,206 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 18:44:52,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 18:44:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:52,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:44:52,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:44:52,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720666786] [2022-11-18 18:44:52,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720666786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:52,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:52,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:44:52,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54647712] [2022-11-18 18:44:52,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:52,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:44:52,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:44:52,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:44:52,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:44:52,319 INFO L87 Difference]: Start difference. First operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:52,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:52,629 INFO L93 Difference]: Finished difference Result 748 states and 2564 transitions. [2022-11-18 18:44:52,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:44:52,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 18:44:52,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:52,657 INFO L225 Difference]: With dead ends: 748 [2022-11-18 18:44:52,657 INFO L226 Difference]: Without dead ends: 748 [2022-11-18 18:44:52,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:44:52,662 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:52,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:44:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-18 18:44:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2022-11-18 18:44:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 616 states have (on average 4.162337662337662) internal successors, (2564), 747 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2564 transitions. [2022-11-18 18:44:52,830 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2564 transitions. Word has length 2 [2022-11-18 18:44:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:52,831 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 2564 transitions. [2022-11-18 18:44:52,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2564 transitions. [2022-11-18 18:44:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 18:44:52,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:52,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 18:44:52,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:53,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:44:53,052 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:44:53,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:53,053 INFO L85 PathProgramCache]: Analyzing trace with hash 23268, now seen corresponding path program 1 times [2022-11-18 18:44:53,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:44:53,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573407415] [2022-11-18 18:44:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:53,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:44:53,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:44:53,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:44:53,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-18 18:44:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:53,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:44:53,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:53,407 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:44:53,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:44:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:53,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:44:53,489 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:44:53,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573407415] [2022-11-18 18:44:53,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573407415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:53,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:53,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:44:53,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183481551] [2022-11-18 18:44:53,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:53,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:44:53,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:44:53,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:44:53,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:44:53,493 INFO L87 Difference]: Start difference. First operand 748 states and 2564 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:54,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:54,041 INFO L93 Difference]: Finished difference Result 1494 states and 5126 transitions. [2022-11-18 18:44:54,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:44:54,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 18:44:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:54,057 INFO L225 Difference]: With dead ends: 1494 [2022-11-18 18:44:54,057 INFO L226 Difference]: Without dead ends: 1494 [2022-11-18 18:44:54,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:44:54,067 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:54,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:44:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-11-18 18:44:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 749. [2022-11-18 18:44:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.162074554294976) internal successors, (2568), 748 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2568 transitions. [2022-11-18 18:44:54,125 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2568 transitions. Word has length 2 [2022-11-18 18:44:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:54,125 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2568 transitions. [2022-11-18 18:44:54,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2568 transitions. [2022-11-18 18:44:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 18:44:54,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:54,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 18:44:54,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:54,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:44:54,346 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:44:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:54,347 INFO L85 PathProgramCache]: Analyzing trace with hash 23423, now seen corresponding path program 1 times [2022-11-18 18:44:54,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:44:54,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458016503] [2022-11-18 18:44:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:54,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:44:54,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:44:54,349 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:44:54,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-18 18:44:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:54,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:44:54,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:54,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:44:54,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:44:54,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458016503] [2022-11-18 18:44:54,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458016503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:54,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:54,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:44:54,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272415774] [2022-11-18 18:44:54,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:54,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:44:54,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:44:54,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:44:54,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:44:54,480 INFO L87 Difference]: Start difference. First operand 749 states and 2568 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:54,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:54,803 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-11-18 18:44:54,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:44:54,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 18:44:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:54,812 INFO L225 Difference]: With dead ends: 749 [2022-11-18 18:44:54,812 INFO L226 Difference]: Without dead ends: 749 [2022-11-18 18:44:54,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:44:54,818 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:54,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:44:54,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-18 18:44:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-18 18:44:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.157212317666127) internal successors, (2565), 748 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-11-18 18:44:54,890 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 2 [2022-11-18 18:44:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:54,891 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-11-18 18:44:54,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-11-18 18:44:54,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 18:44:54,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:54,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 18:44:54,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:55,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:44:55,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:44:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:55,107 INFO L85 PathProgramCache]: Analyzing trace with hash 725604, now seen corresponding path program 1 times [2022-11-18 18:44:55,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:44:55,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175836636] [2022-11-18 18:44:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:55,108 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 [2022-11-18 18:44:55,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:44:55,110 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:44:55,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-18 18:44:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:55,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:44:55,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:55,390 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:44:55,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:44:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:55,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:55,801 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:44:55,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175836636] [2022-11-18 18:44:55,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175836636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:55,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:44:55,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-18 18:44:55,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411319787] [2022-11-18 18:44:55,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:55,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:44:55,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:44:55,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:44:55,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:44:55,803 INFO L87 Difference]: Start difference. First operand 749 states and 2565 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:56,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:56,895 INFO L93 Difference]: Finished difference Result 1497 states and 5135 transitions. [2022-11-18 18:44:56,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:44:56,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-18 18:44:56,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:56,909 INFO L225 Difference]: With dead ends: 1497 [2022-11-18 18:44:56,909 INFO L226 Difference]: Without dead ends: 1497 [2022-11-18 18:44:56,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:44:56,910 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 163 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:56,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 9 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 18:44:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2022-11-18 18:44:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 752. [2022-11-18 18:44:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 620 states have (on average 4.156451612903226) internal successors, (2577), 751 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2577 transitions. [2022-11-18 18:44:56,953 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2577 transitions. Word has length 3 [2022-11-18 18:44:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:56,953 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 2577 transitions. [2022-11-18 18:44:56,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2577 transitions. [2022-11-18 18:44:56,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 18:44:56,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:56,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 18:44:56,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:57,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:44:57,171 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:44:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash 725759, now seen corresponding path program 1 times [2022-11-18 18:44:57,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:44:57,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109695796] [2022-11-18 18:44:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:57,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:44:57,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:44:57,177 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:44:57,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-18 18:44:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:57,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 18:44:57,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:57,433 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-18 18:44:57,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-18 18:44:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:44:57,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:44:57,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:44:57,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109695796] [2022-11-18 18:44:57,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109695796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:57,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:57,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:44:57,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991187128] [2022-11-18 18:44:57,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:57,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:44:57,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:44:57,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:44:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:44:57,573 INFO L87 Difference]: Start difference. First operand 752 states and 2577 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:57,781 INFO L93 Difference]: Finished difference Result 751 states and 2573 transitions. [2022-11-18 18:44:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:44:57,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-18 18:44:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:57,788 INFO L225 Difference]: With dead ends: 751 [2022-11-18 18:44:57,788 INFO L226 Difference]: Without dead ends: 751 [2022-11-18 18:44:57,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:44:57,790 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:57,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-18 18:44:57,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-18 18:44:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 751. [2022-11-18 18:44:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 620 states have (on average 4.15) internal successors, (2573), 750 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2573 transitions. [2022-11-18 18:44:57,826 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2573 transitions. Word has length 3 [2022-11-18 18:44:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:57,827 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 2573 transitions. [2022-11-18 18:44:57,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2573 transitions. [2022-11-18 18:44:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 18:44:57,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:57,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 18:44:57,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:58,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:44:58,042 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:44:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:58,044 INFO L85 PathProgramCache]: Analyzing trace with hash 725760, now seen corresponding path program 1 times [2022-11-18 18:44:58,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:44:58,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484585645] [2022-11-18 18:44:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:58,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:44:58,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:44:58,046 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:44:58,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-18 18:44:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:58,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 18:44:58,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:44:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:44:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:44:58,322 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-18 18:44:58,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-18 18:44:58,367 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 18:44:58,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-18 18:44:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:58,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:58,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:44:58,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484585645] [2022-11-18 18:44:58,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484585645] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:58,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:44:58,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-18 18:44:58,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811055413] [2022-11-18 18:44:58,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:58,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:44:58,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:44:58,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:44:58,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:44:58,666 INFO L87 Difference]: Start difference. First operand 751 states and 2573 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:58,964 INFO L93 Difference]: Finished difference Result 625 states and 2069 transitions. [2022-11-18 18:44:58,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:44:58,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-18 18:44:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:58,970 INFO L225 Difference]: With dead ends: 625 [2022-11-18 18:44:58,970 INFO L226 Difference]: Without dead ends: 625 [2022-11-18 18:44:58,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:44:58,971 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:58,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:44:58,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-11-18 18:44:59,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2022-11-18 18:44:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 522 states have (on average 3.9636015325670497) internal successors, (2069), 624 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 2069 transitions. [2022-11-18 18:44:59,020 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 2069 transitions. Word has length 3 [2022-11-18 18:44:59,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:59,021 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 2069 transitions. [2022-11-18 18:44:59,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:59,021 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 2069 transitions. [2022-11-18 18:44:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 18:44:59,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:59,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 18:44:59,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:59,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:44:59,239 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:44:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash 697470199, now seen corresponding path program 1 times [2022-11-18 18:44:59,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:44:59,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916703459] [2022-11-18 18:44:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:59,241 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 [2022-11-18 18:44:59,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:44:59,243 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:44:59,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-18 18:44:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:59,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 18:44:59,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:59,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:44:59,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:44:59,569 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-18 18:44:59,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-18 18:44:59,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-18 18:44:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:59,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:00,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:00,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916703459] [2022-11-18 18:45:00,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916703459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:00,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:00,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 18:45:00,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934911363] [2022-11-18 18:45:00,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:00,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:45:00,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:45:00,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:45:00,235 INFO L87 Difference]: Start difference. First operand 625 states and 2069 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:00,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:00,932 INFO L93 Difference]: Finished difference Result 631 states and 2089 transitions. [2022-11-18 18:45:00,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:45:00,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 18:45:00,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:00,939 INFO L225 Difference]: With dead ends: 631 [2022-11-18 18:45:00,939 INFO L226 Difference]: Without dead ends: 631 [2022-11-18 18:45:00,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:45:00,941 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:00,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 57 Unchecked, 0.6s Time] [2022-11-18 18:45:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-11-18 18:45:00,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 628. [2022-11-18 18:45:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 525 states have (on average 3.96) internal successors, (2079), 627 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2079 transitions. [2022-11-18 18:45:00,969 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2079 transitions. Word has length 5 [2022-11-18 18:45:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:00,969 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 2079 transitions. [2022-11-18 18:45:00,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2079 transitions. [2022-11-18 18:45:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 18:45:00,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:00,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 18:45:00,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:01,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:01,186 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:01,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash 697470198, now seen corresponding path program 1 times [2022-11-18 18:45:01,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:01,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005579299] [2022-11-18 18:45:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:01,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:01,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:01,190 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:01,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-18 18:45:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:01,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 18:45:01,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:01,431 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 18:45:01,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-18 18:45:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:01,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:45:01,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:01,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005579299] [2022-11-18 18:45:01,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005579299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:01,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:01,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:45:01,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549751357] [2022-11-18 18:45:01,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:01,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:45:01,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:01,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:45:01,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:45:01,623 INFO L87 Difference]: Start difference. First operand 628 states and 2079 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:01,760 INFO L93 Difference]: Finished difference Result 628 states and 2081 transitions. [2022-11-18 18:45:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:45:01,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 18:45:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:01,766 INFO L225 Difference]: With dead ends: 628 [2022-11-18 18:45:01,766 INFO L226 Difference]: Without dead ends: 628 [2022-11-18 18:45:01,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:45:01,767 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:01,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-18 18:45:01,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-18 18:45:01,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2022-11-18 18:45:01,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 525 states have (on average 3.9638095238095237) internal successors, (2081), 627 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:01,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2081 transitions. [2022-11-18 18:45:01,796 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2081 transitions. Word has length 5 [2022-11-18 18:45:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:01,797 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 2081 transitions. [2022-11-18 18:45:01,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2081 transitions. [2022-11-18 18:45:01,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:45:01,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:01,798 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-18 18:45:01,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:02,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:02,013 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:02,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:02,013 INFO L85 PathProgramCache]: Analyzing trace with hash 145898212, now seen corresponding path program 2 times [2022-11-18 18:45:02,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:02,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778533163] [2022-11-18 18:45:02,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:45:02,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:02,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:02,016 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:02,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-18 18:45:02,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:45:02,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:02,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 18:45:02,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:02,328 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:45:02,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:45:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:02,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:03,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:03,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778533163] [2022-11-18 18:45:03,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778533163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:03,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:03,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:45:03,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677117844] [2022-11-18 18:45:03,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:03,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:45:03,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:45:03,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:45:03,437 INFO L87 Difference]: Start difference. First operand 628 states and 2081 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:10,220 INFO L93 Difference]: Finished difference Result 5573 states and 18575 transitions. [2022-11-18 18:45:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:45:10,222 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 18:45:10,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:10,272 INFO L225 Difference]: With dead ends: 5573 [2022-11-18 18:45:10,272 INFO L226 Difference]: Without dead ends: 5573 [2022-11-18 18:45:10,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:45:10,273 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 962 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:10,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 72 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-18 18:45:10,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5573 states. [2022-11-18 18:45:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5573 to 634. [2022-11-18 18:45:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 531 states have (on average 3.9416195856873824) internal successors, (2093), 633 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 2093 transitions. [2022-11-18 18:45:10,401 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 2093 transitions. Word has length 6 [2022-11-18 18:45:10,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:10,402 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 2093 transitions. [2022-11-18 18:45:10,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 2093 transitions. [2022-11-18 18:45:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:45:10,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:10,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:45:10,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:10,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:10,619 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash 146734139, now seen corresponding path program 1 times [2022-11-18 18:45:10,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:10,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204294008] [2022-11-18 18:45:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:10,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:10,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:10,622 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:10,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-18 18:45:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:10,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:45:10,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:10,866 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 18:45:10,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 18:45:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:10,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:45:10,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:10,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204294008] [2022-11-18 18:45:10,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204294008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:10,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:10,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:45:10,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410535476] [2022-11-18 18:45:10,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:10,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:45:10,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:10,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:45:10,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:45:10,907 INFO L87 Difference]: Start difference. First operand 634 states and 2093 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:11,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:11,141 INFO L93 Difference]: Finished difference Result 371 states and 1188 transitions. [2022-11-18 18:45:11,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:45:11,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 18:45:11,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:11,146 INFO L225 Difference]: With dead ends: 371 [2022-11-18 18:45:11,146 INFO L226 Difference]: Without dead ends: 371 [2022-11-18 18:45:11,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:45:11,147 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:11,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:45:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-18 18:45:11,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-11-18 18:45:11,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 330 states have (on average 3.6) internal successors, (1188), 370 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1188 transitions. [2022-11-18 18:45:11,170 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1188 transitions. Word has length 6 [2022-11-18 18:45:11,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:11,170 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 1188 transitions. [2022-11-18 18:45:11,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1188 transitions. [2022-11-18 18:45:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:45:11,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:11,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:45:11,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:11,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:11,385 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:11,386 INFO L85 PathProgramCache]: Analyzing trace with hash 146734140, now seen corresponding path program 1 times [2022-11-18 18:45:11,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:11,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54678258] [2022-11-18 18:45:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:11,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:11,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:11,388 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:11,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-18 18:45:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:11,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:45:11,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:11,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:11,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-18 18:45:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:11,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:11,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54678258] [2022-11-18 18:45:11,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54678258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:11,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:11,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:45:11,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325596215] [2022-11-18 18:45:11,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:11,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:45:11,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:11,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:45:11,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:45:11,994 INFO L87 Difference]: Start difference. First operand 371 states and 1188 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:13,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:13,416 INFO L93 Difference]: Finished difference Result 1156 states and 3704 transitions. [2022-11-18 18:45:13,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:45:13,418 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 18:45:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:13,426 INFO L225 Difference]: With dead ends: 1156 [2022-11-18 18:45:13,427 INFO L226 Difference]: Without dead ends: 1156 [2022-11-18 18:45:13,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:45:13,428 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 386 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:13,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 19 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 18:45:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-11-18 18:45:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 437. [2022-11-18 18:45:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 396 states have (on average 3.734848484848485) internal successors, (1479), 436 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1479 transitions. [2022-11-18 18:45:13,456 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1479 transitions. Word has length 6 [2022-11-18 18:45:13,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:13,457 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 1479 transitions. [2022-11-18 18:45:13,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:13,457 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1479 transitions. [2022-11-18 18:45:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:45:13,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:13,458 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-18 18:45:13,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:13,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:13,673 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash 227908855, now seen corresponding path program 2 times [2022-11-18 18:45:13,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:13,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926207303] [2022-11-18 18:45:13,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:45:13,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:13,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:13,675 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:13,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-18 18:45:13,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:45:13,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:13,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 18:45:13,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:13,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:45:13,972 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-18 18:45:13,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-18 18:45:13,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 18:45:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:45:14,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:45:14,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:14,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926207303] [2022-11-18 18:45:14,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926207303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:14,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:14,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:45:14,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316759376] [2022-11-18 18:45:14,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:14,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:45:14,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:14,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:45:14,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:45:14,303 INFO L87 Difference]: Start difference. First operand 437 states and 1479 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:14,459 INFO L93 Difference]: Finished difference Result 435 states and 1474 transitions. [2022-11-18 18:45:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:45:14,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:45:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:14,463 INFO L225 Difference]: With dead ends: 435 [2022-11-18 18:45:14,464 INFO L226 Difference]: Without dead ends: 435 [2022-11-18 18:45:14,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:45:14,465 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:14,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-11-18 18:45:14,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-18 18:45:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 432. [2022-11-18 18:45:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 391 states have (on average 3.7544757033248084) internal successors, (1468), 431 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1468 transitions. [2022-11-18 18:45:14,483 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1468 transitions. Word has length 7 [2022-11-18 18:45:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:14,483 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 1468 transitions. [2022-11-18 18:45:14,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1468 transitions. [2022-11-18 18:45:14,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:45:14,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:14,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:14,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:14,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:14,700 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:14,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:14,700 INFO L85 PathProgramCache]: Analyzing trace with hash 253793607, now seen corresponding path program 1 times [2022-11-18 18:45:14,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:14,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114352628] [2022-11-18 18:45:14,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:14,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:14,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:14,702 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:14,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-18 18:45:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:14,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:45:14,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:14,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:15,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:15,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114352628] [2022-11-18 18:45:15,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114352628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:15,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:15,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-18 18:45:15,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525297113] [2022-11-18 18:45:15,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:15,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:45:15,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:15,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:45:15,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:45:15,133 INFO L87 Difference]: Start difference. First operand 432 states and 1468 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:16,248 INFO L93 Difference]: Finished difference Result 851 states and 2781 transitions. [2022-11-18 18:45:16,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:45:16,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:45:16,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:16,254 INFO L225 Difference]: With dead ends: 851 [2022-11-18 18:45:16,255 INFO L226 Difference]: Without dead ends: 851 [2022-11-18 18:45:16,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:45:16,256 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 231 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:16,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 24 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 18:45:16,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-11-18 18:45:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 432. [2022-11-18 18:45:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 391 states have (on average 3.585677749360614) internal successors, (1402), 431 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1402 transitions. [2022-11-18 18:45:16,300 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1402 transitions. Word has length 7 [2022-11-18 18:45:16,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:16,300 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 1402 transitions. [2022-11-18 18:45:16,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1402 transitions. [2022-11-18 18:45:16,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:45:16,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:16,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:16,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:16,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:16,516 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:16,517 INFO L85 PathProgramCache]: Analyzing trace with hash 253794196, now seen corresponding path program 1 times [2022-11-18 18:45:16,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:16,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019280594] [2022-11-18 18:45:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:16,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:16,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:16,519 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:16,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-18 18:45:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:16,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 18:45:16,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:16,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:45:16,849 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-18 18:45:16,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-18 18:45:16,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 18:45:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:17,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:17,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:17,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019280594] [2022-11-18 18:45:17,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019280594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:17,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:17,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 18:45:17,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776380667] [2022-11-18 18:45:17,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:17,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:45:17,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:17,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:45:17,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:45:17,564 INFO L87 Difference]: Start difference. First operand 432 states and 1402 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:18,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:18,155 INFO L93 Difference]: Finished difference Result 440 states and 1422 transitions. [2022-11-18 18:45:18,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:45:18,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:45:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:18,159 INFO L225 Difference]: With dead ends: 440 [2022-11-18 18:45:18,159 INFO L226 Difference]: Without dead ends: 440 [2022-11-18 18:45:18,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:45:18,160 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:18,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 68 Unchecked, 0.5s Time] [2022-11-18 18:45:18,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-18 18:45:18,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 436. [2022-11-18 18:45:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 395 states have (on average 3.5746835443037974) internal successors, (1412), 435 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:18,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1412 transitions. [2022-11-18 18:45:18,183 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1412 transitions. Word has length 7 [2022-11-18 18:45:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:18,184 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 1412 transitions. [2022-11-18 18:45:18,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:18,184 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1412 transitions. [2022-11-18 18:45:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:45:18,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:18,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:18,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Ended with exit code 0 [2022-11-18 18:45:18,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:18,400 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:18,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:18,400 INFO L85 PathProgramCache]: Analyzing trace with hash 253794113, now seen corresponding path program 1 times [2022-11-18 18:45:18,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:18,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29379540] [2022-11-18 18:45:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:18,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:18,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:18,402 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:18,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-18 18:45:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:18,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:45:18,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:18,720 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:45:18,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:45:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:18,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:19,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:19,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29379540] [2022-11-18 18:45:19,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29379540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:19,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:19,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:45:19,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949366577] [2022-11-18 18:45:19,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:19,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:45:19,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:19,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:45:19,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:45:19,533 INFO L87 Difference]: Start difference. First operand 436 states and 1412 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:21,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:21,520 INFO L93 Difference]: Finished difference Result 793 states and 2714 transitions. [2022-11-18 18:45:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:45:21,522 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:45:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:21,526 INFO L225 Difference]: With dead ends: 793 [2022-11-18 18:45:21,527 INFO L226 Difference]: Without dead ends: 793 [2022-11-18 18:45:21,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:45:21,528 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 283 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:21,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 17 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 18:45:21,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-18 18:45:21,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 643. [2022-11-18 18:45:21,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 602 states have (on average 3.86046511627907) internal successors, (2324), 642 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 2324 transitions. [2022-11-18 18:45:21,553 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 2324 transitions. Word has length 7 [2022-11-18 18:45:21,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:21,554 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 2324 transitions. [2022-11-18 18:45:21,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 2324 transitions. [2022-11-18 18:45:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:45:21,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:21,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:21,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:21,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:21,769 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:21,770 INFO L85 PathProgramCache]: Analyzing trace with hash 253794195, now seen corresponding path program 1 times [2022-11-18 18:45:21,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:21,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801302118] [2022-11-18 18:45:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:21,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:21,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:21,772 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:21,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-18 18:45:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:21,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:45:21,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:22,058 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-18 18:45:22,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2022-11-18 18:45:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:22,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:45:22,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:22,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801302118] [2022-11-18 18:45:22,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801302118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:22,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:22,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:45:22,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545693627] [2022-11-18 18:45:22,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:22,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:45:22,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:22,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:45:22,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:45:22,115 INFO L87 Difference]: Start difference. First operand 643 states and 2324 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:22,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:22,321 INFO L93 Difference]: Finished difference Result 621 states and 2257 transitions. [2022-11-18 18:45:22,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:45:22,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:45:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:22,326 INFO L225 Difference]: With dead ends: 621 [2022-11-18 18:45:22,326 INFO L226 Difference]: Without dead ends: 621 [2022-11-18 18:45:22,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:45:22,327 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:22,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:45:22,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-11-18 18:45:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2022-11-18 18:45:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 586 states have (on average 3.8515358361774745) internal successors, (2257), 620 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 2257 transitions. [2022-11-18 18:45:22,350 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 2257 transitions. Word has length 7 [2022-11-18 18:45:22,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:22,351 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 2257 transitions. [2022-11-18 18:45:22,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:22,351 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 2257 transitions. [2022-11-18 18:45:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:45:22,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:22,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:22,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:22,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:22,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:22,568 INFO L85 PathProgramCache]: Analyzing trace with hash 253977843, now seen corresponding path program 1 times [2022-11-18 18:45:22,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:22,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578060601] [2022-11-18 18:45:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:22,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:22,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:22,570 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:22,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-18 18:45:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:22,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:45:22,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:22,810 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 18:45:22,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-11-18 18:45:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:22,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:45:22,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:22,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578060601] [2022-11-18 18:45:22,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578060601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:22,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:22,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:45:22,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152127957] [2022-11-18 18:45:22,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:22,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:45:22,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:22,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:45:22,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:45:22,870 INFO L87 Difference]: Start difference. First operand 621 states and 2257 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:23,040 INFO L93 Difference]: Finished difference Result 585 states and 2141 transitions. [2022-11-18 18:45:23,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:45:23,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:45:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:23,045 INFO L225 Difference]: With dead ends: 585 [2022-11-18 18:45:23,045 INFO L226 Difference]: Without dead ends: 585 [2022-11-18 18:45:23,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:45:23,046 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:23,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:45:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-11-18 18:45:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2022-11-18 18:45:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 556 states have (on average 3.8507194244604315) internal successors, (2141), 584 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 2141 transitions. [2022-11-18 18:45:23,075 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 2141 transitions. Word has length 7 [2022-11-18 18:45:23,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:23,075 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 2141 transitions. [2022-11-18 18:45:23,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 2141 transitions. [2022-11-18 18:45:23,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:45:23,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:23,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:23,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:23,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:23,292 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash 253977844, now seen corresponding path program 1 times [2022-11-18 18:45:23,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:23,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937278771] [2022-11-18 18:45:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:23,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:23,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:23,295 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:23,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-18 18:45:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:23,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 18:45:23,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:23,628 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:45:23,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:45:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:23,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:24,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937278771] [2022-11-18 18:45:24,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937278771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:24,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:24,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 18:45:24,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419045965] [2022-11-18 18:45:24,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:24,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:45:24,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:45:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:45:24,268 INFO L87 Difference]: Start difference. First operand 585 states and 2141 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:24,601 INFO L93 Difference]: Finished difference Result 1116 states and 4132 transitions. [2022-11-18 18:45:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:45:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:45:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:24,608 INFO L225 Difference]: With dead ends: 1116 [2022-11-18 18:45:24,609 INFO L226 Difference]: Without dead ends: 1116 [2022-11-18 18:45:24,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:45:24,610 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:24,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 18 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 106 Unchecked, 0.3s Time] [2022-11-18 18:45:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-11-18 18:45:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 857. [2022-11-18 18:45:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 828 states have (on average 4.009661835748792) internal successors, (3320), 856 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 3320 transitions. [2022-11-18 18:45:24,645 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 3320 transitions. Word has length 7 [2022-11-18 18:45:24,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:24,646 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 3320 transitions. [2022-11-18 18:45:24,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 3320 transitions. [2022-11-18 18:45:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 18:45:24,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:24,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:24,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:24,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:24,862 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:24,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:24,862 INFO L85 PathProgramCache]: Analyzing trace with hash -722314526, now seen corresponding path program 1 times [2022-11-18 18:45:24,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:24,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454676839] [2022-11-18 18:45:24,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:24,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:24,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:24,864 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:24,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-18 18:45:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:25,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 18:45:25,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:25,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:45:25,196 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-18 18:45:25,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-18 18:45:25,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-18 18:45:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:25,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:25,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:25,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454676839] [2022-11-18 18:45:25,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454676839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:25,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:25,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 18:45:25,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733415198] [2022-11-18 18:45:25,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:25,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:45:25,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:25,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:45:25,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:45:25,899 INFO L87 Difference]: Start difference. First operand 857 states and 3320 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2022-11-18 18:45:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:26,399 INFO L93 Difference]: Finished difference Result 858 states and 3320 transitions. [2022-11-18 18:45:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:45:26,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 8 [2022-11-18 18:45:26,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:26,405 INFO L225 Difference]: With dead ends: 858 [2022-11-18 18:45:26,405 INFO L226 Difference]: Without dead ends: 858 [2022-11-18 18:45:26,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:45:26,406 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:26,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 22 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-11-18 18:45:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-11-18 18:45:26,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 858. [2022-11-18 18:45:26,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 829 states have (on average 4.0048250904704465) internal successors, (3320), 857 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3320 transitions. [2022-11-18 18:45:26,438 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3320 transitions. Word has length 8 [2022-11-18 18:45:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:26,438 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 3320 transitions. [2022-11-18 18:45:26,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2022-11-18 18:45:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3320 transitions. [2022-11-18 18:45:26,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 18:45:26,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:26,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:26,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:26,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:26,655 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:26,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:26,656 INFO L85 PathProgramCache]: Analyzing trace with hash -716626654, now seen corresponding path program 1 times [2022-11-18 18:45:26,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:26,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881841964] [2022-11-18 18:45:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:26,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:26,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:26,657 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:26,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-18 18:45:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:45:26,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:26,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:27,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-18 18:45:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:27,323 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:27,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881841964] [2022-11-18 18:45:27,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881841964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:27,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:27,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:45:27,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659692321] [2022-11-18 18:45:27,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:27,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:45:27,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:27,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:45:27,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:45:27,325 INFO L87 Difference]: Start difference. First operand 858 states and 3320 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) [2022-11-18 18:45:28,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:28,482 INFO L93 Difference]: Finished difference Result 1652 states and 6140 transitions. [2022-11-18 18:45:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:45:28,483 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 8 [2022-11-18 18:45:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:28,491 INFO L225 Difference]: With dead ends: 1652 [2022-11-18 18:45:28,491 INFO L226 Difference]: Without dead ends: 1652 [2022-11-18 18:45:28,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:45:28,493 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 387 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:28,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 17 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 18:45:28,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2022-11-18 18:45:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1069. [2022-11-18 18:45:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1040 states have (on average 4.201923076923077) internal successors, (4370), 1068 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 4370 transitions. [2022-11-18 18:45:28,556 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 4370 transitions. Word has length 8 [2022-11-18 18:45:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:28,556 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 4370 transitions. [2022-11-18 18:45:28,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) [2022-11-18 18:45:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 4370 transitions. [2022-11-18 18:45:28,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 18:45:28,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:28,558 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:28,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:28,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:28,771 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:28,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:28,772 INFO L85 PathProgramCache]: Analyzing trace with hash -23091308, now seen corresponding path program 2 times [2022-11-18 18:45:28,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:28,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717057988] [2022-11-18 18:45:28,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:45:28,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:28,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:28,776 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:28,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-18 18:45:28,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:45:28,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:28,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 18:45:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:28,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:45:29,084 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-18 18:45:29,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-18 18:45:29,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 18:45:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:45:29,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:45:29,411 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:29,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717057988] [2022-11-18 18:45:29,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717057988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:29,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:29,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:45:29,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708549324] [2022-11-18 18:45:29,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:29,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:45:29,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:29,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:45:29,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:45:29,419 INFO L87 Difference]: Start difference. First operand 1069 states and 4370 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:29,673 INFO L93 Difference]: Finished difference Result 1065 states and 4357 transitions. [2022-11-18 18:45:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:45:29,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 18:45:29,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:29,681 INFO L225 Difference]: With dead ends: 1065 [2022-11-18 18:45:29,681 INFO L226 Difference]: Without dead ends: 1065 [2022-11-18 18:45:29,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:45:29,683 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:29,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2022-11-18 18:45:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-11-18 18:45:29,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2022-11-18 18:45:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1036 states have (on average 4.205598455598456) internal successors, (4357), 1064 states have internal predecessors, (4357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 4357 transitions. [2022-11-18 18:45:29,724 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 4357 transitions. Word has length 9 [2022-11-18 18:45:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:29,725 INFO L495 AbstractCegarLoop]: Abstraction has 1065 states and 4357 transitions. [2022-11-18 18:45:29,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 4357 transitions. [2022-11-18 18:45:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 18:45:29,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:29,726 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:29,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:29,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:29,941 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash -22907660, now seen corresponding path program 2 times [2022-11-18 18:45:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:29,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686850228] [2022-11-18 18:45:29,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:45:29,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:29,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:29,944 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:29,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-18 18:45:30,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:45:30,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 18:45:30,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:30,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:45:30,282 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-18 18:45:30,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-18 18:45:30,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 163 [2022-11-18 18:45:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:45:30,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:45:30,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:30,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686850228] [2022-11-18 18:45:30,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686850228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:30,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:30,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:45:30,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226759422] [2022-11-18 18:45:30,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:30,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:45:30,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:30,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:45:30,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:45:30,403 INFO L87 Difference]: Start difference. First operand 1065 states and 4357 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:30,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:30,585 INFO L93 Difference]: Finished difference Result 1021 states and 4206 transitions. [2022-11-18 18:45:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:45:30,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 18:45:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:30,590 INFO L225 Difference]: With dead ends: 1021 [2022-11-18 18:45:30,591 INFO L226 Difference]: Without dead ends: 1021 [2022-11-18 18:45:30,591 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 [2022-11-18 18:45:30,592 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:30,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:45:30,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-11-18 18:45:30,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 670. [2022-11-18 18:45:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 647 states have (on average 4.041731066460588) internal successors, (2615), 669 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:30,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2615 transitions. [2022-11-18 18:45:30,620 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2615 transitions. Word has length 9 [2022-11-18 18:45:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:30,621 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 2615 transitions. [2022-11-18 18:45:30,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:30,621 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2615 transitions. [2022-11-18 18:45:30,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 18:45:30,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:30,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:30,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:30,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:30,836 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:30,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:30,837 INFO L85 PathProgramCache]: Analyzing trace with hash -740412915, now seen corresponding path program 1 times [2022-11-18 18:45:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:30,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074687208] [2022-11-18 18:45:30,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:30,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:30,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:30,839 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:30,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-18 18:45:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:30,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 18:45:30,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:31,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:45:31,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:31,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074687208] [2022-11-18 18:45:31,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074687208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:31,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:31,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:45:31,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709862572] [2022-11-18 18:45:31,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:31,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:45:31,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:45:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:45:31,039 INFO L87 Difference]: Start difference. First operand 670 states and 2615 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:31,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:31,200 INFO L93 Difference]: Finished difference Result 510 states and 1883 transitions. [2022-11-18 18:45:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:45:31,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 18:45:31,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:31,203 INFO L225 Difference]: With dead ends: 510 [2022-11-18 18:45:31,203 INFO L226 Difference]: Without dead ends: 510 [2022-11-18 18:45:31,204 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 [2022-11-18 18:45:31,204 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:31,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:45:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-11-18 18:45:31,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2022-11-18 18:45:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 495 states have (on average 3.804040404040404) internal successors, (1883), 509 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1883 transitions. [2022-11-18 18:45:31,229 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1883 transitions. Word has length 9 [2022-11-18 18:45:31,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:31,229 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 1883 transitions. [2022-11-18 18:45:31,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1883 transitions. [2022-11-18 18:45:31,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 18:45:31,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:31,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:31,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:31,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:31,445 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash -740587394, now seen corresponding path program 1 times [2022-11-18 18:45:31,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:31,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950065205] [2022-11-18 18:45:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:31,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:31,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:31,447 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:31,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-18 18:45:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:31,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:45:31,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:31,716 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:45:31,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:45:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:32,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:32,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:32,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950065205] [2022-11-18 18:45:32,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950065205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:32,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:32,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:45:32,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886517657] [2022-11-18 18:45:32,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:32,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:45:32,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:32,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:45:32,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:45:32,575 INFO L87 Difference]: Start difference. First operand 510 states and 1883 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:33,150 INFO L93 Difference]: Finished difference Result 512 states and 1891 transitions. [2022-11-18 18:45:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:45:33,152 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 18:45:33,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:33,154 INFO L225 Difference]: With dead ends: 512 [2022-11-18 18:45:33,154 INFO L226 Difference]: Without dead ends: 512 [2022-11-18 18:45:33,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:45:33,155 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:33,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 25 Unchecked, 0.5s Time] [2022-11-18 18:45:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-18 18:45:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-11-18 18:45:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 497 states have (on average 3.8048289738430583) internal successors, (1891), 511 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1891 transitions. [2022-11-18 18:45:33,169 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1891 transitions. Word has length 9 [2022-11-18 18:45:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:33,170 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 1891 transitions. [2022-11-18 18:45:33,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1891 transitions. [2022-11-18 18:45:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:45:33,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:33,171 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:33,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:33,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:33,386 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:33,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:33,386 INFO L85 PathProgramCache]: Analyzing trace with hash -715830558, now seen corresponding path program 2 times [2022-11-18 18:45:33,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:33,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298018686] [2022-11-18 18:45:33,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:45:33,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:33,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:33,388 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:33,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-18 18:45:33,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:45:33,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:33,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 18:45:33,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:33,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:45:33,680 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-18 18:45:33,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-18 18:45:33,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-18 18:45:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 18:45:34,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:45:34,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:34,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298018686] [2022-11-18 18:45:34,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298018686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:34,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:34,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:45:34,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015721981] [2022-11-18 18:45:34,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:34,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:45:34,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:34,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:45:34,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:45:34,020 INFO L87 Difference]: Start difference. First operand 512 states and 1891 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:34,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:34,139 INFO L93 Difference]: Finished difference Result 511 states and 1890 transitions. [2022-11-18 18:45:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:45:34,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 18:45:34,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:34,141 INFO L225 Difference]: With dead ends: 511 [2022-11-18 18:45:34,141 INFO L226 Difference]: Without dead ends: 511 [2022-11-18 18:45:34,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:45:34,142 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:34,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-18 18:45:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-18 18:45:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 503. [2022-11-18 18:45:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 489 states have (on average 3.826175869120654) internal successors, (1871), 502 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1871 transitions. [2022-11-18 18:45:34,153 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1871 transitions. Word has length 10 [2022-11-18 18:45:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:34,153 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 1871 transitions. [2022-11-18 18:45:34,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1871 transitions. [2022-11-18 18:45:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:45:34,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:34,154 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:34,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:34,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:34,367 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:34,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:34,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1641026940, now seen corresponding path program 2 times [2022-11-18 18:45:34,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:34,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669459571] [2022-11-18 18:45:34,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:45:34,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:34,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:34,370 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:34,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-18 18:45:34,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:45:34,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:34,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 18:45:34,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:34,716 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:45:34,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:45:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:35,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:36,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:36,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669459571] [2022-11-18 18:45:36,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669459571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:36,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:36,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 18:45:36,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231225582] [2022-11-18 18:45:36,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:36,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:45:36,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:36,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:45:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:45:36,826 INFO L87 Difference]: Start difference. First operand 503 states and 1871 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:51,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:51,580 INFO L93 Difference]: Finished difference Result 1692 states and 5884 transitions. [2022-11-18 18:45:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:45:51,583 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 18:45:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:51,587 INFO L225 Difference]: With dead ends: 1692 [2022-11-18 18:45:51,587 INFO L226 Difference]: Without dead ends: 1692 [2022-11-18 18:45:51,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2022-11-18 18:45:51,588 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 489 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:51,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 141 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-11-18 18:45:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-11-18 18:45:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 821. [2022-11-18 18:45:51,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 807 states have (on average 3.7732342007434942) internal successors, (3045), 820 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:51,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 3045 transitions. [2022-11-18 18:45:51,629 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 3045 transitions. Word has length 10 [2022-11-18 18:45:51,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:51,629 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 3045 transitions. [2022-11-18 18:45:51,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:51,629 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 3045 transitions. [2022-11-18 18:45:51,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:45:51,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:51,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:51,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:51,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:51,845 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:51,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:51,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1477994500, now seen corresponding path program 1 times [2022-11-18 18:45:51,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:51,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968139886] [2022-11-18 18:45:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:51,846 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:51,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:51,847 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:51,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-18 18:45:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:51,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:45:52,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:52,175 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:45:52,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:45:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:52,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:53,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:53,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968139886] [2022-11-18 18:45:53,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968139886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:53,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:53,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:45:53,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296161881] [2022-11-18 18:45:53,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:53,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:45:53,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:53,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:45:53,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:45:53,125 INFO L87 Difference]: Start difference. First operand 821 states and 3045 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:53,703 INFO L93 Difference]: Finished difference Result 845 states and 3135 transitions. [2022-11-18 18:45:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:45:53,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 18:45:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:53,706 INFO L225 Difference]: With dead ends: 845 [2022-11-18 18:45:53,706 INFO L226 Difference]: Without dead ends: 845 [2022-11-18 18:45:53,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:45:53,707 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:53,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-11-18 18:45:53,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-11-18 18:45:53,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 833. [2022-11-18 18:45:53,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 819 states have (on average 3.7765567765567765) internal successors, (3093), 832 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 3093 transitions. [2022-11-18 18:45:53,736 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 3093 transitions. Word has length 10 [2022-11-18 18:45:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:53,736 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 3093 transitions. [2022-11-18 18:45:53,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 3093 transitions. [2022-11-18 18:45:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:45:53,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:53,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:53,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-18 18:45:53,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:53,952 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:53,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1477967732, now seen corresponding path program 1 times [2022-11-18 18:45:53,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:53,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944008498] [2022-11-18 18:45:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:53,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:53,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:53,956 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:53,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-18 18:45:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:54,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:45:54,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:54,260 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:45:54,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:45:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:54,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:55,423 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:55,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944008498] [2022-11-18 18:45:55,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944008498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:55,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:55,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:45:55,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601156137] [2022-11-18 18:45:55,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:55,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:45:55,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:55,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:45:55,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:45:55,426 INFO L87 Difference]: Start difference. First operand 833 states and 3093 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:56,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:56,166 INFO L93 Difference]: Finished difference Result 860 states and 3200 transitions. [2022-11-18 18:45:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:45:56,167 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 18:45:56,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:56,169 INFO L225 Difference]: With dead ends: 860 [2022-11-18 18:45:56,169 INFO L226 Difference]: Without dead ends: 860 [2022-11-18 18:45:56,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:45:56,170 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:56,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2022-11-18 18:45:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-18 18:45:56,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2022-11-18 18:45:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 846 states have (on average 3.7825059101654848) internal successors, (3200), 859 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 3200 transitions. [2022-11-18 18:45:56,204 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 3200 transitions. Word has length 10 [2022-11-18 18:45:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:56,205 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 3200 transitions. [2022-11-18 18:45:56,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 3200 transitions. [2022-11-18 18:45:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:45:56,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:56,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:56,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:45:56,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:56,420 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:56,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:56,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1483356880, now seen corresponding path program 2 times [2022-11-18 18:45:56,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:56,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231157420] [2022-11-18 18:45:56,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:45:56,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:56,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:56,421 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:56,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:45:56,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:45:56,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:56,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:45:56,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:56,734 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:45:56,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:45:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:57,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:57,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:45:57,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231157420] [2022-11-18 18:45:57,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231157420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:57,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:45:57,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:45:57,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936042384] [2022-11-18 18:45:57,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:57,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:45:57,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:45:57,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:45:57,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:45:57,705 INFO L87 Difference]: Start difference. First operand 860 states and 3200 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:58,530 INFO L93 Difference]: Finished difference Result 1136 states and 4380 transitions. [2022-11-18 18:45:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:45:58,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 18:45:58,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:58,535 INFO L225 Difference]: With dead ends: 1136 [2022-11-18 18:45:58,535 INFO L226 Difference]: Without dead ends: 1136 [2022-11-18 18:45:58,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:45:58,536 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:58,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 25 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 126 Unchecked, 0.8s Time] [2022-11-18 18:45:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-11-18 18:45:58,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1082. [2022-11-18 18:45:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1068 states have (on average 3.9775280898876404) internal successors, (4248), 1081 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:58,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 4248 transitions. [2022-11-18 18:45:58,565 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 4248 transitions. Word has length 10 [2022-11-18 18:45:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:58,566 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 4248 transitions. [2022-11-18 18:45:58,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 4248 transitions. [2022-11-18 18:45:58,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:45:58,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:58,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:58,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:58,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:58,768 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:45:58,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:58,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1483369900, now seen corresponding path program 3 times [2022-11-18 18:45:58,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:45:58,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064433355] [2022-11-18 18:45:58,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:45:58,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:45:58,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:45:58,776 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:45:58,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-18 18:45:58,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:45:58,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:58,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:45:58,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:59,173 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:45:59,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:45:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:45:59,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:00,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:46:00,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064433355] [2022-11-18 18:46:00,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064433355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:00,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:46:00,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:46:00,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985959469] [2022-11-18 18:46:00,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:00,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:46:00,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:46:00,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:46:00,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:46:00,099 INFO L87 Difference]: Start difference. First operand 1082 states and 4248 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:00,874 INFO L93 Difference]: Finished difference Result 1190 states and 4674 transitions. [2022-11-18 18:46:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:46:00,875 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 18:46:00,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:00,878 INFO L225 Difference]: With dead ends: 1190 [2022-11-18 18:46:00,878 INFO L226 Difference]: Without dead ends: 1190 [2022-11-18 18:46:00,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:46:00,879 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:00,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 21 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 75 Unchecked, 0.7s Time] [2022-11-18 18:46:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-11-18 18:46:00,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1028. [2022-11-18 18:46:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1014 states have (on average 3.899408284023669) internal successors, (3954), 1027 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3954 transitions. [2022-11-18 18:46:00,909 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3954 transitions. Word has length 10 [2022-11-18 18:46:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:00,909 INFO L495 AbstractCegarLoop]: Abstraction has 1028 states and 3954 transitions. [2022-11-18 18:46:00,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3954 transitions. [2022-11-18 18:46:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:46:00,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:00,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:00,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:01,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:01,125 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:46:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:01,125 INFO L85 PathProgramCache]: Analyzing trace with hash -671548261, now seen corresponding path program 1 times [2022-11-18 18:46:01,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:46:01,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39200901] [2022-11-18 18:46:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:01,125 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 [2022-11-18 18:46:01,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:46:01,126 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:46:01,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-18 18:46:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:01,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:46:01,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:01,487 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:46:01,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:46:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:01,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:02,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:46:02,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39200901] [2022-11-18 18:46:02,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39200901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:02,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:46:02,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:46:02,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278657492] [2022-11-18 18:46:02,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:02,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:46:02,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:46:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:46:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:46:02,410 INFO L87 Difference]: Start difference. First operand 1028 states and 3954 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:02,953 INFO L93 Difference]: Finished difference Result 1052 states and 4068 transitions. [2022-11-18 18:46:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:46:02,954 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:46:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:02,958 INFO L225 Difference]: With dead ends: 1052 [2022-11-18 18:46:02,958 INFO L226 Difference]: Without dead ends: 1052 [2022-11-18 18:46:02,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:46:02,960 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:02,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 66 Unchecked, 0.5s Time] [2022-11-18 18:46:02,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-11-18 18:46:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1040. [2022-11-18 18:46:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1026 states have (on average 3.912280701754386) internal successors, (4014), 1039 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 4014 transitions. [2022-11-18 18:46:02,993 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 4014 transitions. Word has length 11 [2022-11-18 18:46:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:02,993 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 4014 transitions. [2022-11-18 18:46:02,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 4014 transitions. [2022-11-18 18:46:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:46:02,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:02,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:03,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:03,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:03,212 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:46:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:03,213 INFO L85 PathProgramCache]: Analyzing trace with hash -784916191, now seen corresponding path program 2 times [2022-11-18 18:46:03,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:46:03,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40784750] [2022-11-18 18:46:03,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:46:03,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:03,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:46:03,216 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:46:03,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-18 18:46:03,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:46:03,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:03,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:46:03,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:03,597 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:46:03,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:46:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:03,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:04,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:46:04,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40784750] [2022-11-18 18:46:04,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40784750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:04,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:46:04,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:46:04,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997455401] [2022-11-18 18:46:04,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:04,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:46:04,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:46:04,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:46:04,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:46:04,635 INFO L87 Difference]: Start difference. First operand 1040 states and 4014 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:05,320 INFO L93 Difference]: Finished difference Result 1062 states and 4113 transitions. [2022-11-18 18:46:05,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:46:05,321 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:46:05,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:05,324 INFO L225 Difference]: With dead ends: 1062 [2022-11-18 18:46:05,324 INFO L226 Difference]: Without dead ends: 1062 [2022-11-18 18:46:05,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:46:05,325 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:05,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 58 Unchecked, 0.6s Time] [2022-11-18 18:46:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-11-18 18:46:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 1056. [2022-11-18 18:46:05,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1042 states have (on average 3.9213051823416505) internal successors, (4086), 1055 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 4086 transitions. [2022-11-18 18:46:05,350 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 4086 transitions. Word has length 11 [2022-11-18 18:46:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:05,350 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 4086 transitions. [2022-11-18 18:46:05,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 4086 transitions. [2022-11-18 18:46:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:46:05,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:05,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:05,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-18 18:46:05,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:05,566 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:46:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash -784907821, now seen corresponding path program 3 times [2022-11-18 18:46:05,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:46:05,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504146042] [2022-11-18 18:46:05,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:46:05,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:05,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:46:05,568 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:46:05,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-18 18:46:05,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:46:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:46:05,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:05,887 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:46:05,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:46:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:06,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:06,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:46:06,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504146042] [2022-11-18 18:46:06,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504146042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:06,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:46:06,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:46:06,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906313651] [2022-11-18 18:46:06,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:06,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:46:06,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:46:06,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:46:06,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:46:06,872 INFO L87 Difference]: Start difference. First operand 1056 states and 4086 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:07,415 INFO L93 Difference]: Finished difference Result 1086 states and 4235 transitions. [2022-11-18 18:46:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:46:07,417 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:46:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:07,420 INFO L225 Difference]: With dead ends: 1086 [2022-11-18 18:46:07,420 INFO L226 Difference]: Without dead ends: 1086 [2022-11-18 18:46:07,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:46:07,421 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:07,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2022-11-18 18:46:07,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-11-18 18:46:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1070. [2022-11-18 18:46:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1056 states have (on average 3.941287878787879) internal successors, (4162), 1069 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 4162 transitions. [2022-11-18 18:46:07,457 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 4162 transitions. Word has length 11 [2022-11-18 18:46:07,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:07,457 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 4162 transitions. [2022-11-18 18:46:07,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 4162 transitions. [2022-11-18 18:46:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:46:07,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:07,459 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:07,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:07,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:07,674 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:46:07,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:07,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1426813156, now seen corresponding path program 4 times [2022-11-18 18:46:07,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:46:07,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149373174] [2022-11-18 18:46:07,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:46:07,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:07,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:46:07,677 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:46:07,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-18 18:46:07,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:46:07,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:07,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:46:07,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:08,027 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:46:08,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:46:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:08,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:09,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:46:09,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149373174] [2022-11-18 18:46:09,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149373174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:09,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:46:09,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-18 18:46:09,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602727961] [2022-11-18 18:46:09,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:09,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:46:09,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:46:09,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:46:09,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:46:09,213 INFO L87 Difference]: Start difference. First operand 1070 states and 4162 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:10,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:10,099 INFO L93 Difference]: Finished difference Result 1058 states and 4112 transitions. [2022-11-18 18:46:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:46:10,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:46:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:10,102 INFO L225 Difference]: With dead ends: 1058 [2022-11-18 18:46:10,102 INFO L226 Difference]: Without dead ends: 1058 [2022-11-18 18:46:10,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:46:10,103 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:10,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 66 Unchecked, 0.8s Time] [2022-11-18 18:46:10,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-11-18 18:46:10,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1058. [2022-11-18 18:46:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1044 states have (on average 3.9386973180076628) internal successors, (4112), 1057 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 4112 transitions. [2022-11-18 18:46:10,132 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 4112 transitions. Word has length 11 [2022-11-18 18:46:10,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:10,132 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 4112 transitions. [2022-11-18 18:46:10,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:10,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 4112 transitions. [2022-11-18 18:46:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:46:10,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:10,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:10,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:10,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:10,350 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:46:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1426679577, now seen corresponding path program 1 times [2022-11-18 18:46:10,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:46:10,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899313431] [2022-11-18 18:46:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:10,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:10,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:46:10,352 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:46:10,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-18 18:46:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:10,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:46:10,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:10,711 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:46:10,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:46:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:11,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:11,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:46:11,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899313431] [2022-11-18 18:46:11,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899313431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:11,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:46:11,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:46:11,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072525767] [2022-11-18 18:46:11,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:11,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:46:11,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:46:11,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:46:11,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:46:11,599 INFO L87 Difference]: Start difference. First operand 1058 states and 4112 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:12,172 INFO L93 Difference]: Finished difference Result 1082 states and 4240 transitions. [2022-11-18 18:46:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:46:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:46:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:12,176 INFO L225 Difference]: With dead ends: 1082 [2022-11-18 18:46:12,176 INFO L226 Difference]: Without dead ends: 1082 [2022-11-18 18:46:12,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:46:12,177 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:12,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 20 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 35 Unchecked, 0.5s Time] [2022-11-18 18:46:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-11-18 18:46:12,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1078. [2022-11-18 18:46:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1064 states have (on average 3.969924812030075) internal successors, (4224), 1077 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:12,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 4224 transitions. [2022-11-18 18:46:12,217 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 4224 transitions. Word has length 11 [2022-11-18 18:46:12,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:12,217 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 4224 transitions. [2022-11-18 18:46:12,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:12,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 4224 transitions. [2022-11-18 18:46:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:46:12,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:12,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:12,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:12,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:12,433 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:46:12,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:12,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1427774977, now seen corresponding path program 1 times [2022-11-18 18:46:12,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:46:12,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622911262] [2022-11-18 18:46:12,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:12,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:12,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:46:12,435 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:46:12,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-18 18:46:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:12,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:46:12,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:12,768 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:46:12,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:46:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:13,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:14,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:46:14,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622911262] [2022-11-18 18:46:14,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622911262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:14,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:46:14,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:46:14,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206065043] [2022-11-18 18:46:14,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:14,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:46:14,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:46:14,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:46:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:46:14,365 INFO L87 Difference]: Start difference. First operand 1078 states and 4224 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:15,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:15,270 INFO L93 Difference]: Finished difference Result 1150 states and 4580 transitions. [2022-11-18 18:46:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:46:15,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:46:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:15,275 INFO L225 Difference]: With dead ends: 1150 [2022-11-18 18:46:15,275 INFO L226 Difference]: Without dead ends: 1150 [2022-11-18 18:46:15,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:46:15,280 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:15,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 77 Unchecked, 0.4s Time] [2022-11-18 18:46:15,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2022-11-18 18:46:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1150. [2022-11-18 18:46:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1136 states have (on average 4.03169014084507) internal successors, (4580), 1149 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 4580 transitions. [2022-11-18 18:46:15,316 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 4580 transitions. Word has length 11 [2022-11-18 18:46:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:15,316 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 4580 transitions. [2022-11-18 18:46:15,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 4580 transitions. [2022-11-18 18:46:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:46:15,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:15,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:15,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-18 18:46:15,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:15,519 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:46:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:15,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1427643847, now seen corresponding path program 2 times [2022-11-18 18:46:15,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:46:15,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706830431] [2022-11-18 18:46:15,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:46:15,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:15,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:46:15,521 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:46:15,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-18 18:46:15,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:46:15,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:15,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 18:46:15,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:15,825 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:46:15,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:46:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:16,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:46:16,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:46:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706830431] [2022-11-18 18:46:16,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706830431] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:16,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:16,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:46:16,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732895623] [2022-11-18 18:46:16,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:16,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:46:16,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:46:16,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:46:16,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:46:16,113 INFO L87 Difference]: Start difference. First operand 1150 states and 4580 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:16,609 INFO L93 Difference]: Finished difference Result 1331 states and 5232 transitions. [2022-11-18 18:46:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:46:16,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:46:16,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:16,617 INFO L225 Difference]: With dead ends: 1331 [2022-11-18 18:46:16,617 INFO L226 Difference]: Without dead ends: 1331 [2022-11-18 18:46:16,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:46:16,617 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:16,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 18:46:16,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-11-18 18:46:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1236. [2022-11-18 18:46:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1222 states have (on average 3.954991816693944) internal successors, (4833), 1235 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:16,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4833 transitions. [2022-11-18 18:46:16,644 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4833 transitions. Word has length 11 [2022-11-18 18:46:16,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:16,645 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 4833 transitions. [2022-11-18 18:46:16,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:16,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4833 transitions. [2022-11-18 18:46:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:46:16,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:16,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:16,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-18 18:46:16,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:16,855 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:46:16,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:16,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1427644591, now seen corresponding path program 1 times [2022-11-18 18:46:16,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:46:16,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497767622] [2022-11-18 18:46:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:16,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:16,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:46:16,857 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:46:16,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-18 18:46:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 18:46:17,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:17,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:17,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:46:17,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497767622] [2022-11-18 18:46:17,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497767622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:17,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:46:17,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:46:17,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658398243] [2022-11-18 18:46:17,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:17,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:46:17,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:46:17,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:46:17,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:46:17,646 INFO L87 Difference]: Start difference. First operand 1236 states and 4833 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:19,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:19,052 INFO L93 Difference]: Finished difference Result 1316 states and 4941 transitions. [2022-11-18 18:46:19,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:46:19,054 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:46:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:19,057 INFO L225 Difference]: With dead ends: 1316 [2022-11-18 18:46:19,057 INFO L226 Difference]: Without dead ends: 1316 [2022-11-18 18:46:19,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:46:19,058 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 157 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:19,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 41 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 280 Invalid, 0 Unknown, 69 Unchecked, 1.2s Time] [2022-11-18 18:46:19,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-11-18 18:46:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1287. [2022-11-18 18:46:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1273 states have (on average 3.8389630793401412) internal successors, (4887), 1286 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 4887 transitions. [2022-11-18 18:46:19,083 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 4887 transitions. Word has length 11 [2022-11-18 18:46:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:19,084 INFO L495 AbstractCegarLoop]: Abstraction has 1287 states and 4887 transitions. [2022-11-18 18:46:19,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 4887 transitions. [2022-11-18 18:46:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:46:19,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:19,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:19,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:19,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:19,299 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:46:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:19,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1427630967, now seen corresponding path program 2 times [2022-11-18 18:46:19,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:46:19,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412324262] [2022-11-18 18:46:19,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:46:19,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:19,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:46:19,300 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:46:19,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-18 18:46:19,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:46:19,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:19,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:46:19,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:19,671 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:46:19,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:46:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:20,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:20,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:46:20,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412324262] [2022-11-18 18:46:20,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412324262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:20,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:46:20,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:46:20,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785632313] [2022-11-18 18:46:20,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:20,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:46:20,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:46:20,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:46:20,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:46:20,716 INFO L87 Difference]: Start difference. First operand 1287 states and 4887 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:21,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:21,297 INFO L93 Difference]: Finished difference Result 1315 states and 5023 transitions. [2022-11-18 18:46:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:46:21,298 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:46:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:21,301 INFO L225 Difference]: With dead ends: 1315 [2022-11-18 18:46:21,302 INFO L226 Difference]: Without dead ends: 1315 [2022-11-18 18:46:21,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:46:21,302 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:21,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 26 Unchecked, 0.5s Time] [2022-11-18 18:46:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-11-18 18:46:21,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1303. [2022-11-18 18:46:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1289 states have (on average 3.8502715283165245) internal successors, (4963), 1302 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4963 transitions. [2022-11-18 18:46:21,329 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4963 transitions. Word has length 11 [2022-11-18 18:46:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:21,329 INFO L495 AbstractCegarLoop]: Abstraction has 1303 states and 4963 transitions. [2022-11-18 18:46:21,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:21,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4963 transitions. [2022-11-18 18:46:21,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:46:21,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:21,331 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-18 18:46:21,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-18 18:46:21,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:21,532 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:46:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:21,532 INFO L85 PathProgramCache]: Analyzing trace with hash 417008356, now seen corresponding path program 3 times [2022-11-18 18:46:21,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:46:21,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373188715] [2022-11-18 18:46:21,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:46:21,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:21,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:46:21,533 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:46:21,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-18 18:46:21,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 18:46:21,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:21,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:46:21,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:21,985 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:46:21,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:46:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:22,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:26,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:46:26,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373188715] [2022-11-18 18:46:26,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373188715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:26,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:46:26,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-18 18:46:26,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756856715] [2022-11-18 18:46:26,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:26,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:46:26,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:46:26,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:46:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:46:26,587 INFO L87 Difference]: Start difference. First operand 1303 states and 4963 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:58,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:58,361 INFO L93 Difference]: Finished difference Result 14485 states and 56715 transitions. [2022-11-18 18:46:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 18:46:58,363 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:46:58,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:58,418 INFO L225 Difference]: With dead ends: 14485 [2022-11-18 18:46:58,418 INFO L226 Difference]: Without dead ends: 14485 [2022-11-18 18:46:58,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:46:58,419 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4095 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4095 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:58,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4095 Valid, 360 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3003 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2022-11-18 18:46:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14485 states. [2022-11-18 18:46:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14485 to 1315. [2022-11-18 18:46:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1301 states have (on average 3.833205226748655) internal successors, (4987), 1314 states have internal predecessors, (4987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 4987 transitions. [2022-11-18 18:46:58,647 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 4987 transitions. Word has length 12 [2022-11-18 18:46:58,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:58,648 INFO L495 AbstractCegarLoop]: Abstraction has 1315 states and 4987 transitions. [2022-11-18 18:46:58,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 4987 transitions. [2022-11-18 18:46:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:46:58,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:58,649 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-11-18 18:46:58,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:58,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:58,862 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:46:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:58,863 INFO L85 PathProgramCache]: Analyzing trace with hash -402760063, now seen corresponding path program 3 times [2022-11-18 18:46:58,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:46:58,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068424275] [2022-11-18 18:46:58,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:46:58,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:46:58,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:46:58,865 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:46:58,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-18 18:46:59,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 18:46:59,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:59,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:46:59,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:59,300 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:46:59,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:46:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 18:46:59,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:59,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-18 18:46:59,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-18 18:46:59,802 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 18:47:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 18:47:00,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:00,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068424275] [2022-11-18 18:47:00,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068424275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:00,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:00,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-18 18:47:00,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645366192] [2022-11-18 18:47:00,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:00,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:47:00,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:47:00,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:47:00,738 INFO L87 Difference]: Start difference. First operand 1315 states and 4987 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:05,086 INFO L93 Difference]: Finished difference Result 1410 states and 5209 transitions. [2022-11-18 18:47:05,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:47:05,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:05,090 INFO L225 Difference]: With dead ends: 1410 [2022-11-18 18:47:05,090 INFO L226 Difference]: Without dead ends: 1410 [2022-11-18 18:47:05,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:47:05,090 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:05,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 74 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 463 Invalid, 0 Unknown, 41 Unchecked, 3.3s Time] [2022-11-18 18:47:05,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2022-11-18 18:47:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1320. [2022-11-18 18:47:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1306 states have (on average 3.826186830015314) internal successors, (4997), 1319 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 4997 transitions. [2022-11-18 18:47:05,116 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 4997 transitions. Word has length 12 [2022-11-18 18:47:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:05,116 INFO L495 AbstractCegarLoop]: Abstraction has 1320 states and 4997 transitions. [2022-11-18 18:47:05,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 4997 transitions. [2022-11-18 18:47:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:05,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:05,117 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:05,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:05,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:05,317 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:05,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1691818127, now seen corresponding path program 3 times [2022-11-18 18:47:05,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:05,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348651178] [2022-11-18 18:47:05,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:47:05,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:05,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:05,319 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:05,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-18 18:47:05,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:47:05,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:05,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 18:47:05,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:05,646 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-18 18:47:05,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-18 18:47:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:05,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:06,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:06,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348651178] [2022-11-18 18:47:06,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348651178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:06,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:06,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 18:47:06,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891897884] [2022-11-18 18:47:06,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:06,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:47:06,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:06,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:47:06,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:47:06,591 INFO L87 Difference]: Start difference. First operand 1320 states and 4997 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:08,263 INFO L93 Difference]: Finished difference Result 1810 states and 6565 transitions. [2022-11-18 18:47:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:47:08,264 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:08,269 INFO L225 Difference]: With dead ends: 1810 [2022-11-18 18:47:08,269 INFO L226 Difference]: Without dead ends: 1810 [2022-11-18 18:47:08,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:47:08,270 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 241 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:08,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 57 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-18 18:47:08,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-11-18 18:47:08,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1448. [2022-11-18 18:47:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1434 states have (on average 3.890516039051604) internal successors, (5579), 1447 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:08,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5579 transitions. [2022-11-18 18:47:08,312 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5579 transitions. Word has length 12 [2022-11-18 18:47:08,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:08,312 INFO L495 AbstractCegarLoop]: Abstraction has 1448 states and 5579 transitions. [2022-11-18 18:47:08,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5579 transitions. [2022-11-18 18:47:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:08,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:08,313 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:08,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-18 18:47:08,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:08,514 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:08,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:08,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1692653871, now seen corresponding path program 2 times [2022-11-18 18:47:08,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:08,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408227455] [2022-11-18 18:47:08,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:08,515 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:08,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:08,515 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:08,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-18 18:47:08,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:47:08,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:08,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 18:47:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:08,884 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:08,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:09,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:11,333 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:11,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408227455] [2022-11-18 18:47:11,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408227455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:11,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:11,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 18:47:11,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217476107] [2022-11-18 18:47:11,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:11,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:47:11,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:11,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:47:11,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:47:11,335 INFO L87 Difference]: Start difference. First operand 1448 states and 5579 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:20,578 INFO L93 Difference]: Finished difference Result 3643 states and 14943 transitions. [2022-11-18 18:47:20,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 18:47:20,580 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:20,589 INFO L225 Difference]: With dead ends: 3643 [2022-11-18 18:47:20,589 INFO L226 Difference]: Without dead ends: 3643 [2022-11-18 18:47:20,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2022-11-18 18:47:20,590 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 453 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:20,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 86 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 554 Invalid, 0 Unknown, 195 Unchecked, 2.7s Time] [2022-11-18 18:47:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3643 states. [2022-11-18 18:47:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3643 to 2513. [2022-11-18 18:47:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 2499 states have (on average 4.1340536214485795) internal successors, (10331), 2512 states have internal predecessors, (10331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 10331 transitions. [2022-11-18 18:47:20,677 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 10331 transitions. Word has length 12 [2022-11-18 18:47:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:20,678 INFO L495 AbstractCegarLoop]: Abstraction has 2513 states and 10331 transitions. [2022-11-18 18:47:20,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 10331 transitions. [2022-11-18 18:47:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:20,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:20,680 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:20,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:20,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:20,894 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:20,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:20,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1525171582, now seen corresponding path program 2 times [2022-11-18 18:47:20,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:20,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285227113] [2022-11-18 18:47:20,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:20,895 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:20,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:20,896 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:20,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-18 18:47:21,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:47:21,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:21,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 18:47:21,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:21,246 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:21,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:21,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:23,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:23,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285227113] [2022-11-18 18:47:23,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285227113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:23,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:23,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 18:47:23,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814106155] [2022-11-18 18:47:23,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:23,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:47:23,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:23,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:47:23,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:47:23,641 INFO L87 Difference]: Start difference. First operand 2513 states and 10331 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:25,150 INFO L93 Difference]: Finished difference Result 2569 states and 10504 transitions. [2022-11-18 18:47:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:47:25,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:25,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:25,158 INFO L225 Difference]: With dead ends: 2569 [2022-11-18 18:47:25,158 INFO L226 Difference]: Without dead ends: 2569 [2022-11-18 18:47:25,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:47:25,158 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:25,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 84 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 130 Unchecked, 0.5s Time] [2022-11-18 18:47:25,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2022-11-18 18:47:25,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2545. [2022-11-18 18:47:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 2531 states have (on average 4.132358751481628) internal successors, (10459), 2544 states have internal predecessors, (10459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 10459 transitions. [2022-11-18 18:47:25,231 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 10459 transitions. Word has length 12 [2022-11-18 18:47:25,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:25,232 INFO L495 AbstractCegarLoop]: Abstraction has 2545 states and 10459 transitions. [2022-11-18 18:47:25,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:25,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 10459 transitions. [2022-11-18 18:47:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:25,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:25,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:25,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:25,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:25,448 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:25,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:25,449 INFO L85 PathProgramCache]: Analyzing trace with hash 226257129, now seen corresponding path program 1 times [2022-11-18 18:47:25,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:25,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668423865] [2022-11-18 18:47:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:25,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:25,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:25,450 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:25,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-18 18:47:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:25,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:47:25,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:25,806 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:25,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:26,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:26,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:26,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668423865] [2022-11-18 18:47:26,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668423865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:26,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:26,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:47:26,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499798598] [2022-11-18 18:47:26,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:26,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:47:26,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:26,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:47:26,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:26,747 INFO L87 Difference]: Start difference. First operand 2545 states and 10459 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:27,420 INFO L93 Difference]: Finished difference Result 2592 states and 10675 transitions. [2022-11-18 18:47:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:47:27,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:27,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:27,430 INFO L225 Difference]: With dead ends: 2592 [2022-11-18 18:47:27,430 INFO L226 Difference]: Without dead ends: 2592 [2022-11-18 18:47:27,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:27,430 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:27,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 24 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 26 Unchecked, 0.6s Time] [2022-11-18 18:47:27,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2022-11-18 18:47:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2547. [2022-11-18 18:47:27,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2533 states have (on average 4.131464666403474) internal successors, (10465), 2546 states have internal predecessors, (10465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 10465 transitions. [2022-11-18 18:47:27,498 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 10465 transitions. Word has length 12 [2022-11-18 18:47:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:27,498 INFO L495 AbstractCegarLoop]: Abstraction has 2547 states and 10465 transitions. [2022-11-18 18:47:27,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:27,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 10465 transitions. [2022-11-18 18:47:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:27,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:27,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:27,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:27,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:27,717 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash 662218623, now seen corresponding path program 1 times [2022-11-18 18:47:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:27,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833691592] [2022-11-18 18:47:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:27,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:27,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:27,718 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:27,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-18 18:47:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:27,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:47:27,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:28,060 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:28,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:28,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:29,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:29,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833691592] [2022-11-18 18:47:29,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833691592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:29,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:29,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:47:29,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43224132] [2022-11-18 18:47:29,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:29,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:47:29,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:29,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:47:29,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:29,156 INFO L87 Difference]: Start difference. First operand 2547 states and 10465 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:29,734 INFO L93 Difference]: Finished difference Result 2635 states and 10909 transitions. [2022-11-18 18:47:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:47:29,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:29,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:29,742 INFO L225 Difference]: With dead ends: 2635 [2022-11-18 18:47:29,743 INFO L226 Difference]: Without dead ends: 2635 [2022-11-18 18:47:29,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:29,743 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:29,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 66 Unchecked, 0.5s Time] [2022-11-18 18:47:29,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2022-11-18 18:47:29,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2549. [2022-11-18 18:47:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2535 states have (on average 4.131360946745562) internal successors, (10473), 2548 states have internal predecessors, (10473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 10473 transitions. [2022-11-18 18:47:29,820 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 10473 transitions. Word has length 12 [2022-11-18 18:47:29,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:29,820 INFO L495 AbstractCegarLoop]: Abstraction has 2549 states and 10473 transitions. [2022-11-18 18:47:29,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:29,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 10473 transitions. [2022-11-18 18:47:29,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:29,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:29,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:29,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:30,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:30,035 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:30,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:30,035 INFO L85 PathProgramCache]: Analyzing trace with hash 656856243, now seen corresponding path program 2 times [2022-11-18 18:47:30,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:30,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096033344] [2022-11-18 18:47:30,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:30,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:30,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:30,037 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:30,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-18 18:47:30,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:47:30,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:30,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:47:30,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:30,462 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:30,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:30,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:31,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:31,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096033344] [2022-11-18 18:47:31,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096033344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:31,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:31,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:47:31,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680034506] [2022-11-18 18:47:31,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:31,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:47:31,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:31,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:47:31,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:31,421 INFO L87 Difference]: Start difference. First operand 2549 states and 10473 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:32,069 INFO L93 Difference]: Finished difference Result 2705 states and 11258 transitions. [2022-11-18 18:47:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:47:32,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:32,078 INFO L225 Difference]: With dead ends: 2705 [2022-11-18 18:47:32,078 INFO L226 Difference]: Without dead ends: 2705 [2022-11-18 18:47:32,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:32,079 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:32,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 29 Unchecked, 0.6s Time] [2022-11-18 18:47:32,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-11-18 18:47:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2617. [2022-11-18 18:47:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 2603 states have (on average 4.158663081060315) internal successors, (10825), 2616 states have internal predecessors, (10825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 10825 transitions. [2022-11-18 18:47:32,158 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 10825 transitions. Word has length 12 [2022-11-18 18:47:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:32,159 INFO L495 AbstractCegarLoop]: Abstraction has 2617 states and 10825 transitions. [2022-11-18 18:47:32,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 10825 transitions. [2022-11-18 18:47:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:32,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:32,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:32,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:32,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:32,376 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:32,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:32,376 INFO L85 PathProgramCache]: Analyzing trace with hash 656843223, now seen corresponding path program 3 times [2022-11-18 18:47:32,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:32,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044583597] [2022-11-18 18:47:32,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:47:32,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:32,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:32,378 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:32,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-18 18:47:32,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:47:32,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:32,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:47:32,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:32,774 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:32,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:33,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:33,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:33,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044583597] [2022-11-18 18:47:33,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044583597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:33,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:33,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:47:33,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146893897] [2022-11-18 18:47:33,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:33,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:47:33,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:33,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:47:33,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:33,813 INFO L87 Difference]: Start difference. First operand 2617 states and 10825 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:34,657 INFO L93 Difference]: Finished difference Result 3301 states and 14561 transitions. [2022-11-18 18:47:34,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:47:34,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:34,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:34,668 INFO L225 Difference]: With dead ends: 3301 [2022-11-18 18:47:34,668 INFO L226 Difference]: Without dead ends: 3301 [2022-11-18 18:47:34,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:34,669 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:34,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 23 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 51 Unchecked, 0.7s Time] [2022-11-18 18:47:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3301 states. [2022-11-18 18:47:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3301 to 2889. [2022-11-18 18:47:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2875 states have (on average 4.302260869565218) internal successors, (12369), 2888 states have internal predecessors, (12369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 12369 transitions. [2022-11-18 18:47:34,740 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 12369 transitions. Word has length 12 [2022-11-18 18:47:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:34,740 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 12369 transitions. [2022-11-18 18:47:34,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:34,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 12369 transitions. [2022-11-18 18:47:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:34,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:34,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:34,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:34,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:34,956 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:34,956 INFO L85 PathProgramCache]: Analyzing trace with hash 656842479, now seen corresponding path program 2 times [2022-11-18 18:47:34,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:34,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003679634] [2022-11-18 18:47:34,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:34,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:34,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:34,957 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:34,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-18 18:47:35,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:47:35,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:35,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:47:35,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:35,342 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:35,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:35,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:36,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:36,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003679634] [2022-11-18 18:47:36,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003679634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:36,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:36,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:47:36,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519524559] [2022-11-18 18:47:36,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:36,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:47:36,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:36,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:47:36,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:36,410 INFO L87 Difference]: Start difference. First operand 2889 states and 12369 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:37,061 INFO L93 Difference]: Finished difference Result 2912 states and 12463 transitions. [2022-11-18 18:47:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:47:37,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:37,072 INFO L225 Difference]: With dead ends: 2912 [2022-11-18 18:47:37,072 INFO L226 Difference]: Without dead ends: 2912 [2022-11-18 18:47:37,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:37,072 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:37,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 24 Unchecked, 0.6s Time] [2022-11-18 18:47:37,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2022-11-18 18:47:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2890. [2022-11-18 18:47:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2876 states have (on average 4.301808066759388) internal successors, (12372), 2889 states have internal predecessors, (12372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 12372 transitions. [2022-11-18 18:47:37,146 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 12372 transitions. Word has length 12 [2022-11-18 18:47:37,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:37,146 INFO L495 AbstractCegarLoop]: Abstraction has 2890 states and 12372 transitions. [2022-11-18 18:47:37,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:37,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 12372 transitions. [2022-11-18 18:47:37,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:37,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:37,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:37,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:37,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:37,363 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:37,364 INFO L85 PathProgramCache]: Analyzing trace with hash 656833179, now seen corresponding path program 3 times [2022-11-18 18:47:37,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:37,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290659373] [2022-11-18 18:47:37,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:47:37,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:37,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:37,365 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:37,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-18 18:47:37,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:47:37,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:37,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:47:37,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:37,734 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:37,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:38,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:38,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:38,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290659373] [2022-11-18 18:47:38,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290659373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:38,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:38,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:47:38,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264752554] [2022-11-18 18:47:38,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:38,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:47:38,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:38,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:47:38,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:38,792 INFO L87 Difference]: Start difference. First operand 2890 states and 12372 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:39,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:39,340 INFO L93 Difference]: Finished difference Result 2920 states and 12487 transitions. [2022-11-18 18:47:39,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:47:39,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:39,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:39,353 INFO L225 Difference]: With dead ends: 2920 [2022-11-18 18:47:39,354 INFO L226 Difference]: Without dead ends: 2920 [2022-11-18 18:47:39,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:39,354 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:39,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-18 18:47:39,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2022-11-18 18:47:39,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 2894. [2022-11-18 18:47:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2880 states have (on average 4.3) internal successors, (12384), 2893 states have internal predecessors, (12384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 12384 transitions. [2022-11-18 18:47:39,433 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 12384 transitions. Word has length 12 [2022-11-18 18:47:39,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:39,433 INFO L495 AbstractCegarLoop]: Abstraction has 2894 states and 12384 transitions. [2022-11-18 18:47:39,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:39,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 12384 transitions. [2022-11-18 18:47:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:39,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:39,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:39,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:39,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:39,658 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1604055109, now seen corresponding path program 4 times [2022-11-18 18:47:39,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:39,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138420967] [2022-11-18 18:47:39,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:47:39,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:39,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:39,660 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:39,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-18 18:47:39,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:47:39,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:39,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:47:39,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:39,992 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:39,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:40,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:40,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:40,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138420967] [2022-11-18 18:47:40,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138420967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:40,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:40,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:47:40,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034085026] [2022-11-18 18:47:40,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:40,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:47:40,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:40,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:47:40,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:40,959 INFO L87 Difference]: Start difference. First operand 2894 states and 12384 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:41,223 INFO L93 Difference]: Finished difference Result 2973 states and 12783 transitions. [2022-11-18 18:47:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:47:41,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:41,234 INFO L225 Difference]: With dead ends: 2973 [2022-11-18 18:47:41,234 INFO L226 Difference]: Without dead ends: 2973 [2022-11-18 18:47:41,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:41,234 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:41,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-11-18 18:47:41,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2022-11-18 18:47:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2894. [2022-11-18 18:47:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2880 states have (on average 4.3) internal successors, (12384), 2893 states have internal predecessors, (12384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 12384 transitions. [2022-11-18 18:47:41,325 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 12384 transitions. Word has length 12 [2022-11-18 18:47:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:41,326 INFO L495 AbstractCegarLoop]: Abstraction has 2894 states and 12384 transitions. [2022-11-18 18:47:41,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:41,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 12384 transitions. [2022-11-18 18:47:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:41,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:41,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:41,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:41,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:41,541 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:41,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:41,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1437812959, now seen corresponding path program 5 times [2022-11-18 18:47:41,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:41,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175587450] [2022-11-18 18:47:41,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:47:41,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:41,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:41,544 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:41,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-18 18:47:41,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:47:41,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:41,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:47:41,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:42,032 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:42,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:42,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:43,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:43,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175587450] [2022-11-18 18:47:43,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175587450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:43,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:43,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:47:43,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833036100] [2022-11-18 18:47:43,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:43,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:47:43,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:43,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:47:43,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:47:43,374 INFO L87 Difference]: Start difference. First operand 2894 states and 12384 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:44,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:44,297 INFO L93 Difference]: Finished difference Result 3415 states and 14907 transitions. [2022-11-18 18:47:44,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:47:44,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:44,316 INFO L225 Difference]: With dead ends: 3415 [2022-11-18 18:47:44,316 INFO L226 Difference]: Without dead ends: 3415 [2022-11-18 18:47:44,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:47:44,317 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:44,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 31 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 160 Unchecked, 0.8s Time] [2022-11-18 18:47:44,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2022-11-18 18:47:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 2894. [2022-11-18 18:47:44,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2880 states have (on average 4.3) internal successors, (12384), 2893 states have internal predecessors, (12384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 12384 transitions. [2022-11-18 18:47:44,439 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 12384 transitions. Word has length 12 [2022-11-18 18:47:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:44,440 INFO L495 AbstractCegarLoop]: Abstraction has 2894 states and 12384 transitions. [2022-11-18 18:47:44,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 12384 transitions. [2022-11-18 18:47:44,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:44,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:44,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:44,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:44,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:44,656 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:44,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1437821329, now seen corresponding path program 6 times [2022-11-18 18:47:44,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:44,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339462751] [2022-11-18 18:47:44,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:47:44,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:44,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:44,659 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:44,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-18 18:47:44,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:47:44,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:44,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:47:44,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:45,089 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:45,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:45,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:46,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:46,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339462751] [2022-11-18 18:47:46,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339462751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:46,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:46,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:47:46,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904949789] [2022-11-18 18:47:46,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:46,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:47:46,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:46,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:47:46,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:46,084 INFO L87 Difference]: Start difference. First operand 2894 states and 12384 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:47,317 INFO L93 Difference]: Finished difference Result 4021 states and 17756 transitions. [2022-11-18 18:47:47,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:47:47,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:47,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:47,331 INFO L225 Difference]: With dead ends: 4021 [2022-11-18 18:47:47,331 INFO L226 Difference]: Without dead ends: 4021 [2022-11-18 18:47:47,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:47,332 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:47,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 22 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 202 Unchecked, 1.1s Time] [2022-11-18 18:47:47,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2022-11-18 18:47:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3411. [2022-11-18 18:47:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3397 states have (on average 4.446864880777157) internal successors, (15106), 3410 states have internal predecessors, (15106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 15106 transitions. [2022-11-18 18:47:47,471 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 15106 transitions. Word has length 12 [2022-11-18 18:47:47,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:47,472 INFO L495 AbstractCegarLoop]: Abstraction has 3411 states and 15106 transitions. [2022-11-18 18:47:47,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 15106 transitions. [2022-11-18 18:47:47,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:47,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:47,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:47,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:47,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:47,687 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:47,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:47,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1437664159, now seen corresponding path program 7 times [2022-11-18 18:47:47,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:47,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865327281] [2022-11-18 18:47:47,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:47:47,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:47,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:47,689 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:47,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-18 18:47:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:47,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:47:47,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:48,023 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:48,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:48,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:48,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:48,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865327281] [2022-11-18 18:47:48,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865327281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:48,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:48,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:47:48,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931110067] [2022-11-18 18:47:48,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:48,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:47:48,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:48,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:47:48,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:48,914 INFO L87 Difference]: Start difference. First operand 3411 states and 15106 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:49,727 INFO L93 Difference]: Finished difference Result 3842 states and 17294 transitions. [2022-11-18 18:47:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:47:49,729 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:49,740 INFO L225 Difference]: With dead ends: 3842 [2022-11-18 18:47:49,740 INFO L226 Difference]: Without dead ends: 3842 [2022-11-18 18:47:49,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:49,741 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:49,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 31 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 73 Unchecked, 0.7s Time] [2022-11-18 18:47:49,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3842 states. [2022-11-18 18:47:49,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3842 to 3403. [2022-11-18 18:47:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 3389 states have (on average 4.444378872823842) internal successors, (15062), 3402 states have internal predecessors, (15062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 15062 transitions. [2022-11-18 18:47:49,818 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 15062 transitions. Word has length 12 [2022-11-18 18:47:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:49,818 INFO L495 AbstractCegarLoop]: Abstraction has 3403 states and 15062 transitions. [2022-11-18 18:47:49,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 15062 transitions. [2022-11-18 18:47:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:49,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:49,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:49,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-18 18:47:50,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:50,034 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:50,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:50,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1277379990, now seen corresponding path program 1 times [2022-11-18 18:47:50,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:50,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196092455] [2022-11-18 18:47:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:50,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:50,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:50,036 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:50,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-18 18:47:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:50,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:47:50,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:50,348 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:50,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:50,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:51,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:51,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196092455] [2022-11-18 18:47:51,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196092455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:51,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:51,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:47:51,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122966555] [2022-11-18 18:47:51,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:51,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:47:51,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:51,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:47:51,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:51,264 INFO L87 Difference]: Start difference. First operand 3403 states and 15062 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:51,891 INFO L93 Difference]: Finished difference Result 3567 states and 15806 transitions. [2022-11-18 18:47:51,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:47:51,893 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:51,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:51,906 INFO L225 Difference]: With dead ends: 3567 [2022-11-18 18:47:51,906 INFO L226 Difference]: Without dead ends: 3567 [2022-11-18 18:47:51,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:51,907 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:51,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 26 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 61 Unchecked, 0.5s Time] [2022-11-18 18:47:51,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2022-11-18 18:47:51,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 3413. [2022-11-18 18:47:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3399 states have (on average 4.442483083259782) internal successors, (15100), 3412 states have internal predecessors, (15100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 15100 transitions. [2022-11-18 18:47:51,998 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 15100 transitions. Word has length 12 [2022-11-18 18:47:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:51,998 INFO L495 AbstractCegarLoop]: Abstraction has 3413 states and 15100 transitions. [2022-11-18 18:47:51,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 15100 transitions. [2022-11-18 18:47:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:52,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:52,001 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:52,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:52,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:52,213 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:52,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1277396327, now seen corresponding path program 4 times [2022-11-18 18:47:52,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:52,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623010212] [2022-11-18 18:47:52,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:47:52,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:52,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:52,215 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:52,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-18 18:47:52,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:47:52,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:52,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:47:52,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:52,576 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:52,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:52,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:53,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:53,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623010212] [2022-11-18 18:47:53,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623010212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:53,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:53,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-18 18:47:53,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145455358] [2022-11-18 18:47:53,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:53,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:47:53,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:47:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:47:53,872 INFO L87 Difference]: Start difference. First operand 3413 states and 15100 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:54,608 INFO L93 Difference]: Finished difference Result 3413 states and 15084 transitions. [2022-11-18 18:47:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:47:54,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:54,619 INFO L225 Difference]: With dead ends: 3413 [2022-11-18 18:47:54,619 INFO L226 Difference]: Without dead ends: 3413 [2022-11-18 18:47:54,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:47:54,620 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:54,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 23 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 116 Unchecked, 0.6s Time] [2022-11-18 18:47:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3413 states. [2022-11-18 18:47:54,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3413 to 3413. [2022-11-18 18:47:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3399 states have (on average 4.437775816416593) internal successors, (15084), 3412 states have internal predecessors, (15084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:54,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 15084 transitions. [2022-11-18 18:47:54,696 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 15084 transitions. Word has length 12 [2022-11-18 18:47:54,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:54,696 INFO L495 AbstractCegarLoop]: Abstraction has 3413 states and 15084 transitions. [2022-11-18 18:47:54,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:54,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 15084 transitions. [2022-11-18 18:47:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:54,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:54,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:54,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-18 18:47:54,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:54,908 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:54,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1311341730, now seen corresponding path program 2 times [2022-11-18 18:47:54,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:54,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458530226] [2022-11-18 18:47:54,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:54,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:54,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:54,910 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:54,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-18 18:47:55,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:47:55,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:55,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:47:55,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:55,293 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:55,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:55,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:56,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:56,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458530226] [2022-11-18 18:47:56,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458530226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:56,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:56,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:47:56,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322600644] [2022-11-18 18:47:56,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:56,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:47:56,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:56,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:47:56,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:56,196 INFO L87 Difference]: Start difference. First operand 3413 states and 15084 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:56,757 INFO L93 Difference]: Finished difference Result 3485 states and 15390 transitions. [2022-11-18 18:47:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:47:56,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:56,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:56,770 INFO L225 Difference]: With dead ends: 3485 [2022-11-18 18:47:56,770 INFO L226 Difference]: Without dead ends: 3485 [2022-11-18 18:47:56,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:56,771 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:56,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-11-18 18:47:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2022-11-18 18:47:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 3443. [2022-11-18 18:47:56,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3429 states have (on average 4.433945756780402) internal successors, (15204), 3442 states have internal predecessors, (15204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 15204 transitions. [2022-11-18 18:47:56,847 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 15204 transitions. Word has length 12 [2022-11-18 18:47:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:56,847 INFO L495 AbstractCegarLoop]: Abstraction has 3443 states and 15204 transitions. [2022-11-18 18:47:56,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 15204 transitions. [2022-11-18 18:47:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:56,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:56,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:56,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:57,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:57,064 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:57,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:57,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1307141199, now seen corresponding path program 1 times [2022-11-18 18:47:57,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:57,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274600981] [2022-11-18 18:47:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:57,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:57,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:57,066 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:57,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-18 18:47:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:57,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:47:57,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:57,411 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:57,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:57,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:58,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:47:58,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274600981] [2022-11-18 18:47:58,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274600981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:58,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:47:58,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:47:58,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607992409] [2022-11-18 18:47:58,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:58,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:47:58,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:47:58,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:47:58,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:58,276 INFO L87 Difference]: Start difference. First operand 3443 states and 15204 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:58,869 INFO L93 Difference]: Finished difference Result 3507 states and 15514 transitions. [2022-11-18 18:47:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:47:58,871 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:47:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:58,916 INFO L225 Difference]: With dead ends: 3507 [2022-11-18 18:47:58,916 INFO L226 Difference]: Without dead ends: 3507 [2022-11-18 18:47:58,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:58,916 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:58,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 16 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 28 Unchecked, 0.5s Time] [2022-11-18 18:47:58,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2022-11-18 18:47:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3447. [2022-11-18 18:47:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3433 states have (on average 4.434605301485581) internal successors, (15224), 3446 states have internal predecessors, (15224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 15224 transitions. [2022-11-18 18:47:58,991 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 15224 transitions. Word has length 12 [2022-11-18 18:47:58,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:58,991 INFO L495 AbstractCegarLoop]: Abstraction has 3447 states and 15224 transitions. [2022-11-18 18:47:58,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 15224 transitions. [2022-11-18 18:47:58,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:47:58,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:58,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:59,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-18 18:47:59,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:59,193 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:47:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1306873080, now seen corresponding path program 3 times [2022-11-18 18:47:59,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:47:59,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858992113] [2022-11-18 18:47:59,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:47:59,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:47:59,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:47:59,195 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:47:59,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-18 18:47:59,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:47:59,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:59,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:47:59,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:59,552 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:47:59,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:47:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:59,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:48:00,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:48:00,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858992113] [2022-11-18 18:48:00,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858992113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:00,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:48:00,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:48:00,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329387833] [2022-11-18 18:48:00,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:00,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:48:00,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:48:00,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:48:00,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:48:00,462 INFO L87 Difference]: Start difference. First operand 3447 states and 15224 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:01,097 INFO L93 Difference]: Finished difference Result 3511 states and 15494 transitions. [2022-11-18 18:48:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:48:01,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:48:01,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:01,109 INFO L225 Difference]: With dead ends: 3511 [2022-11-18 18:48:01,109 INFO L226 Difference]: Without dead ends: 3511 [2022-11-18 18:48:01,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:48:01,110 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:01,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 18 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 27 Unchecked, 0.5s Time] [2022-11-18 18:48:01,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2022-11-18 18:48:01,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 3447. [2022-11-18 18:48:01,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3433 states have (on average 4.4351878823186714) internal successors, (15226), 3446 states have internal predecessors, (15226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 15226 transitions. [2022-11-18 18:48:01,229 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 15226 transitions. Word has length 12 [2022-11-18 18:48:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:01,229 INFO L495 AbstractCegarLoop]: Abstraction has 3447 states and 15226 transitions. [2022-11-18 18:48:01,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 15226 transitions. [2022-11-18 18:48:01,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:48:01,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:01,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:01,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:01,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:48:01,446 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:48:01,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:01,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1306888890, now seen corresponding path program 4 times [2022-11-18 18:48:01,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:48:01,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070330097] [2022-11-18 18:48:01,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:48:01,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:48:01,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:48:01,449 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:48:01,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-18 18:48:01,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:48:01,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:01,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:48:01,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:01,804 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:48:01,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:48:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:48:02,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:48:02,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:48:02,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070330097] [2022-11-18 18:48:02,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070330097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:02,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:48:02,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:48:02,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95229299] [2022-11-18 18:48:02,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:02,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:48:02,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:48:02,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:48:02,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:48:02,698 INFO L87 Difference]: Start difference. First operand 3447 states and 15226 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:03,308 INFO L93 Difference]: Finished difference Result 3489 states and 15408 transitions. [2022-11-18 18:48:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:48:03,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:48:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:03,320 INFO L225 Difference]: With dead ends: 3489 [2022-11-18 18:48:03,320 INFO L226 Difference]: Without dead ends: 3489 [2022-11-18 18:48:03,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:48:03,321 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:03,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 17 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 29 Unchecked, 0.5s Time] [2022-11-18 18:48:03,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2022-11-18 18:48:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 3445. [2022-11-18 18:48:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3431 states have (on average 4.434858641795395) internal successors, (15216), 3444 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 15216 transitions. [2022-11-18 18:48:03,388 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 15216 transitions. Word has length 12 [2022-11-18 18:48:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:03,388 INFO L495 AbstractCegarLoop]: Abstraction has 3445 states and 15216 transitions. [2022-11-18 18:48:03,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 15216 transitions. [2022-11-18 18:48:03,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:48:03,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:03,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:03,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-18 18:48:03,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:48:03,590 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:48:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:03,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1306884519, now seen corresponding path program 2 times [2022-11-18 18:48:03,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:48:03,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039251340] [2022-11-18 18:48:03,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:48:03,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:48:03,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:48:03,592 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:48:03,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-18 18:48:03,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:48:03,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:03,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:48:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:03,949 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:48:03,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:48:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:48:04,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:48:04,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:48:04,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039251340] [2022-11-18 18:48:04,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039251340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:04,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:48:04,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:48:04,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766087050] [2022-11-18 18:48:04,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:04,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:48:04,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:48:04,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:48:04,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:48:04,996 INFO L87 Difference]: Start difference. First operand 3445 states and 15216 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:05,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:05,652 INFO L93 Difference]: Finished difference Result 3563 states and 15810 transitions. [2022-11-18 18:48:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:48:05,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:48:05,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:05,668 INFO L225 Difference]: With dead ends: 3563 [2022-11-18 18:48:05,668 INFO L226 Difference]: Without dead ends: 3563 [2022-11-18 18:48:05,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:48:05,669 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:05,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 57 Unchecked, 0.6s Time] [2022-11-18 18:48:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2022-11-18 18:48:05,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3509. [2022-11-18 18:48:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3495 states have (on average 4.447496423462089) internal successors, (15544), 3508 states have internal predecessors, (15544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 15544 transitions. [2022-11-18 18:48:05,742 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 15544 transitions. Word has length 12 [2022-11-18 18:48:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:05,743 INFO L495 AbstractCegarLoop]: Abstraction has 3509 states and 15544 transitions. [2022-11-18 18:48:05,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 15544 transitions. [2022-11-18 18:48:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:48:05,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:05,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:05,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-18 18:48:05,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:48:05,944 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:48:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:05,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1306737579, now seen corresponding path program 3 times [2022-11-18 18:48:05,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:48:05,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719754403] [2022-11-18 18:48:05,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:48:05,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:48:05,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:48:05,946 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:48:05,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-18 18:48:06,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:48:06,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:06,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:48:06,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:06,310 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:48:06,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:48:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:48:06,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:48:07,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:48:07,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719754403] [2022-11-18 18:48:07,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719754403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:07,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:48:07,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:48:07,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292072038] [2022-11-18 18:48:07,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:07,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:48:07,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:48:07,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:48:07,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:48:07,316 INFO L87 Difference]: Start difference. First operand 3509 states and 15544 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:07,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:07,970 INFO L93 Difference]: Finished difference Result 3685 states and 16430 transitions. [2022-11-18 18:48:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:48:07,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:48:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:07,981 INFO L225 Difference]: With dead ends: 3685 [2022-11-18 18:48:07,981 INFO L226 Difference]: Without dead ends: 3685 [2022-11-18 18:48:07,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:48:07,982 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:07,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 78 Unchecked, 0.6s Time] [2022-11-18 18:48:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3685 states. [2022-11-18 18:48:08,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3685 to 3585. [2022-11-18 18:48:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 3571 states have (on average 4.468776253150378) internal successors, (15958), 3584 states have internal predecessors, (15958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 15958 transitions. [2022-11-18 18:48:08,049 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 15958 transitions. Word has length 12 [2022-11-18 18:48:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:08,049 INFO L495 AbstractCegarLoop]: Abstraction has 3585 states and 15958 transitions. [2022-11-18 18:48:08,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 15958 transitions. [2022-11-18 18:48:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:48:08,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:08,050 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:08,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-18 18:48:08,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:48:08,251 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:48:08,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:08,251 INFO L85 PathProgramCache]: Analyzing trace with hash 423257392, now seen corresponding path program 5 times [2022-11-18 18:48:08,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:48:08,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884111344] [2022-11-18 18:48:08,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:48:08,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:48:08,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:48:08,253 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:48:08,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-18 18:48:08,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 18:48:08,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:08,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 18:48:08,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:08,674 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:48:08,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:48:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:09,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:09,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-18 18:48:09,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-18 18:48:09,227 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 18:48:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:10,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:48:10,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884111344] [2022-11-18 18:48:10,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884111344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:10,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:48:10,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 18:48:10,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721504507] [2022-11-18 18:48:10,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:10,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 18:48:10,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:48:10,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 18:48:10,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:48:10,590 INFO L87 Difference]: Start difference. First operand 3585 states and 15958 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:13,980 INFO L93 Difference]: Finished difference Result 3893 states and 16839 transitions. [2022-11-18 18:48:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:48:13,981 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:48:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:13,994 INFO L225 Difference]: With dead ends: 3893 [2022-11-18 18:48:13,995 INFO L226 Difference]: Without dead ends: 3893 [2022-11-18 18:48:13,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:48:13,995 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:13,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 60 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 238 Invalid, 0 Unknown, 76 Unchecked, 2.1s Time] [2022-11-18 18:48:14,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2022-11-18 18:48:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 3583. [2022-11-18 18:48:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3569 states have (on average 4.469038946483609) internal successors, (15950), 3582 states have internal predecessors, (15950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 15950 transitions. [2022-11-18 18:48:14,080 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 15950 transitions. Word has length 12 [2022-11-18 18:48:14,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:14,081 INFO L495 AbstractCegarLoop]: Abstraction has 3583 states and 15950 transitions. [2022-11-18 18:48:14,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:14,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 15950 transitions. [2022-11-18 18:48:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:48:14,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:14,083 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-18 18:48:14,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-18 18:48:14,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:48:14,297 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:48:14,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1092461316, now seen corresponding path program 4 times [2022-11-18 18:48:14,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:48:14,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073392894] [2022-11-18 18:48:14,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:48:14,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:48:14,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:48:14,299 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:48:14,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-18 18:48:14,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:48:14,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:14,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 18:48:14,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:14,670 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:48:14,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:48:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:15,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:17,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:48:17,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073392894] [2022-11-18 18:48:17,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073392894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:17,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:48:17,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-18 18:48:17,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820277461] [2022-11-18 18:48:17,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:17,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:48:17,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:48:17,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:48:17,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:48:17,944 INFO L87 Difference]: Start difference. First operand 3583 states and 15950 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:55,671 INFO L93 Difference]: Finished difference Result 7868 states and 33001 transitions. [2022-11-18 18:48:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 18:48:55,673 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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 13 [2022-11-18 18:48:55,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:55,701 INFO L225 Difference]: With dead ends: 7868 [2022-11-18 18:48:55,701 INFO L226 Difference]: Without dead ends: 7868 [2022-11-18 18:48:55,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=566, Invalid=2626, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 18:48:55,702 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 2039 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 3981 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2039 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 4025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:55,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2039 Valid, 581 Invalid, 4025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3981 Invalid, 0 Unknown, 0 Unchecked, 25.2s Time] [2022-11-18 18:48:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2022-11-18 18:48:55,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 4783. [2022-11-18 18:48:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4783 states, 4769 states have (on average 4.481862025581883) internal successors, (21374), 4782 states have internal predecessors, (21374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:55,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4783 states to 4783 states and 21374 transitions. [2022-11-18 18:48:55,917 INFO L78 Accepts]: Start accepts. Automaton has 4783 states and 21374 transitions. Word has length 13 [2022-11-18 18:48:55,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:55,918 INFO L495 AbstractCegarLoop]: Abstraction has 4783 states and 21374 transitions. [2022-11-18 18:48:55,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:55,918 INFO L276 IsEmpty]: Start isEmpty. Operand 4783 states and 21374 transitions. [2022-11-18 18:48:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:48:55,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:55,920 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-11-18 18:48:55,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:56,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:48:56,120 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:48:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:56,121 INFO L85 PathProgramCache]: Analyzing trace with hash -777406975, now seen corresponding path program 5 times [2022-11-18 18:48:56,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:48:56,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879934066] [2022-11-18 18:48:56,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:48:56,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:48:56,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:48:56,122 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:48:56,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-18 18:48:56,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 18:48:56,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:56,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 18:48:56,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:56,544 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:48:56,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:48:57,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 10 [2022-11-18 18:48:57,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-18 18:48:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:48:57,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:57,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-18 18:48:57,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-18 18:48:57,434 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 18:49:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:00,180 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:49:00,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879934066] [2022-11-18 18:49:00,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879934066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:00,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:49:00,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2022-11-18 18:49:00,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93322890] [2022-11-18 18:49:00,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:00,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 18:49:00,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:49:00,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 18:49:00,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-18 18:49:00,183 INFO L87 Difference]: Start difference. First operand 4783 states and 21374 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:18,272 INFO L93 Difference]: Finished difference Result 7638 states and 32644 transitions. [2022-11-18 18:49:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 18:49:18,274 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 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 13 [2022-11-18 18:49:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:18,296 INFO L225 Difference]: With dead ends: 7638 [2022-11-18 18:49:18,296 INFO L226 Difference]: Without dead ends: 7638 [2022-11-18 18:49:18,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 18:49:18,296 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 875 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 1851 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 2265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:18,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [875 Valid, 285 Invalid, 2265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1851 Invalid, 0 Unknown, 402 Unchecked, 12.1s Time] [2022-11-18 18:49:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7638 states. [2022-11-18 18:49:18,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7638 to 5143. [2022-11-18 18:49:18,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5143 states, 5129 states have (on average 4.490348995905634) internal successors, (23031), 5142 states have internal predecessors, (23031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5143 states to 5143 states and 23031 transitions. [2022-11-18 18:49:18,510 INFO L78 Accepts]: Start accepts. Automaton has 5143 states and 23031 transitions. Word has length 13 [2022-11-18 18:49:18,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:18,510 INFO L495 AbstractCegarLoop]: Abstraction has 5143 states and 23031 transitions. [2022-11-18 18:49:18,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:18,510 INFO L276 IsEmpty]: Start isEmpty. Operand 5143 states and 23031 transitions. [2022-11-18 18:49:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:49:18,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:18,512 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:18,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-18 18:49:18,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:18,712 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:49:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:18,713 INFO L85 PathProgramCache]: Analyzing trace with hash 906890364, now seen corresponding path program 6 times [2022-11-18 18:49:18,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:49:18,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852953146] [2022-11-18 18:49:18,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:49:18,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:18,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:49:18,715 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:49:18,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-18 18:49:18,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 18:49:18,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:18,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 18:49:18,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:19,118 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:49:19,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:49:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:19,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:21,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:49:21,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852953146] [2022-11-18 18:49:21,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852953146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:21,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:49:21,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 18:49:21,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175201309] [2022-11-18 18:49:21,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:21,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:49:21,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:49:21,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:49:21,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:49:21,439 INFO L87 Difference]: Start difference. First operand 5143 states and 23031 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:31,062 INFO L93 Difference]: Finished difference Result 10158 states and 44054 transitions. [2022-11-18 18:49:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 18:49:31,064 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 13 [2022-11-18 18:49:31,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:31,092 INFO L225 Difference]: With dead ends: 10158 [2022-11-18 18:49:31,092 INFO L226 Difference]: Without dead ends: 10158 [2022-11-18 18:49:31,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-11-18 18:49:31,093 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 391 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 794 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:31,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 122 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 840 Invalid, 0 Unknown, 794 Unchecked, 6.1s Time] [2022-11-18 18:49:31,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10158 states. [2022-11-18 18:49:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10158 to 7177. [2022-11-18 18:49:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7163 states have (on average 4.612173670249895) internal successors, (33037), 7176 states have internal predecessors, (33037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 33037 transitions. [2022-11-18 18:49:31,247 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 33037 transitions. Word has length 13 [2022-11-18 18:49:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:31,247 INFO L495 AbstractCegarLoop]: Abstraction has 7177 states and 33037 transitions. [2022-11-18 18:49:31,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 33037 transitions. [2022-11-18 18:49:31,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:49:31,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:31,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:31,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-18 18:49:31,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:31,450 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:49:31,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:31,450 INFO L85 PathProgramCache]: Analyzing trace with hash 902749415, now seen corresponding path program 5 times [2022-11-18 18:49:31,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:49:31,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946056945] [2022-11-18 18:49:31,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:49:31,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:31,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:49:31,452 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:49:31,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-18 18:49:31,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:49:31,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:31,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 18:49:31,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:31,819 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:49:31,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:49:32,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-18 18:49:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:49:32,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:32,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-18 18:49:32,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-18 18:49:32,650 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 18:49:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:49:34,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:49:34,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946056945] [2022-11-18 18:49:34,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946056945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:34,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:49:34,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 18:49:34,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231553753] [2022-11-18 18:49:34,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:34,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:49:34,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:49:34,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:49:34,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:49:34,246 INFO L87 Difference]: Start difference. First operand 7177 states and 33037 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:36,411 INFO L93 Difference]: Finished difference Result 8212 states and 37079 transitions. [2022-11-18 18:49:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:49:36,413 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 13 [2022-11-18 18:49:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:36,442 INFO L225 Difference]: With dead ends: 8212 [2022-11-18 18:49:36,443 INFO L226 Difference]: Without dead ends: 8212 [2022-11-18 18:49:36,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:49:36,443 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:36,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 53 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 242 Invalid, 0 Unknown, 148 Unchecked, 1.9s Time] [2022-11-18 18:49:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8212 states. [2022-11-18 18:49:36,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8212 to 7467. [2022-11-18 18:49:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7467 states, 7453 states have (on average 4.621360525962699) internal successors, (34443), 7466 states have internal predecessors, (34443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7467 states to 7467 states and 34443 transitions. [2022-11-18 18:49:36,703 INFO L78 Accepts]: Start accepts. Automaton has 7467 states and 34443 transitions. Word has length 13 [2022-11-18 18:49:36,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:36,704 INFO L495 AbstractCegarLoop]: Abstraction has 7467 states and 34443 transitions. [2022-11-18 18:49:36,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7467 states and 34443 transitions. [2022-11-18 18:49:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:49:36,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:36,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:36,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:36,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:36,907 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:49:36,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1570585359, now seen corresponding path program 1 times [2022-11-18 18:49:36,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:49:36,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996931068] [2022-11-18 18:49:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:36,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:36,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:49:36,909 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:49:36,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-18 18:49:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:37,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:49:37,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:37,320 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:49:37,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:49:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:49:37,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:49:38,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:49:38,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996931068] [2022-11-18 18:49:38,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996931068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:38,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:49:38,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:49:38,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911092649] [2022-11-18 18:49:38,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:38,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:49:38,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:49:38,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:49:38,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:49:38,295 INFO L87 Difference]: Start difference. First operand 7467 states and 34443 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) [2022-11-18 18:49:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:39,071 INFO L93 Difference]: Finished difference Result 7664 states and 35328 transitions. [2022-11-18 18:49:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:49:39,073 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 13 [2022-11-18 18:49:39,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:39,098 INFO L225 Difference]: With dead ends: 7664 [2022-11-18 18:49:39,099 INFO L226 Difference]: Without dead ends: 7664 [2022-11-18 18:49:39,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:49:39,099 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:39,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 31 Unchecked, 0.6s Time] [2022-11-18 18:49:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7664 states. [2022-11-18 18:49:39,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7664 to 7469. [2022-11-18 18:49:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7469 states, 7455 states have (on average 4.620925553319919) internal successors, (34449), 7468 states have internal predecessors, (34449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7469 states to 7469 states and 34449 transitions. [2022-11-18 18:49:39,264 INFO L78 Accepts]: Start accepts. Automaton has 7469 states and 34449 transitions. Word has length 13 [2022-11-18 18:49:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:39,264 INFO L495 AbstractCegarLoop]: Abstraction has 7469 states and 34449 transitions. [2022-11-18 18:49:39,265 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) [2022-11-18 18:49:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 7469 states and 34449 transitions. [2022-11-18 18:49:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:49:39,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:39,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:39,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-18 18:49:39,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:39,468 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:49:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:39,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1575947739, now seen corresponding path program 2 times [2022-11-18 18:49:39,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:49:39,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716852959] [2022-11-18 18:49:39,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:49:39,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:39,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:49:39,470 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:49:39,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-18 18:49:39,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:49:39,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:39,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:49:39,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:39,931 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:49:39,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:49:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:49:40,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:49:41,015 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:49:41,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716852959] [2022-11-18 18:49:41,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716852959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:41,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:49:41,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:49:41,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532975118] [2022-11-18 18:49:41,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:41,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:49:41,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:49:41,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:49:41,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:49:41,017 INFO L87 Difference]: Start difference. First operand 7469 states and 34449 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) [2022-11-18 18:49:41,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:41,690 INFO L93 Difference]: Finished difference Result 7718 states and 35553 transitions. [2022-11-18 18:49:41,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:49:41,692 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 13 [2022-11-18 18:49:41,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:41,720 INFO L225 Difference]: With dead ends: 7718 [2022-11-18 18:49:41,720 INFO L226 Difference]: Without dead ends: 7718 [2022-11-18 18:49:41,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:49:41,721 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:41,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 28 Unchecked, 0.6s Time] [2022-11-18 18:49:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7718 states. [2022-11-18 18:49:41,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7718 to 7488. [2022-11-18 18:49:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7488 states, 7474 states have (on average 4.616938720899117) internal successors, (34507), 7487 states have internal predecessors, (34507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7488 states to 7488 states and 34507 transitions. [2022-11-18 18:49:41,955 INFO L78 Accepts]: Start accepts. Automaton has 7488 states and 34507 transitions. Word has length 13 [2022-11-18 18:49:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:41,955 INFO L495 AbstractCegarLoop]: Abstraction has 7488 states and 34507 transitions. [2022-11-18 18:49:41,955 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) [2022-11-18 18:49:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7488 states and 34507 transitions. [2022-11-18 18:49:41,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:49:41,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:41,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:41,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-18 18:49:42,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:42,158 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:49:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:42,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1575960759, now seen corresponding path program 3 times [2022-11-18 18:49:42,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:49:42,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976841609] [2022-11-18 18:49:42,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:49:42,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:42,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:49:42,160 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:49:42,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-18 18:49:42,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:49:42,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:42,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:49:42,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:42,636 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:49:42,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:49:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:49:43,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:49:43,680 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:49:43,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976841609] [2022-11-18 18:49:43,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976841609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:43,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:49:43,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:49:43,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537690106] [2022-11-18 18:49:43,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:43,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:49:43,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:49:43,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:49:43,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:49:43,681 INFO L87 Difference]: Start difference. First operand 7488 states and 34507 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) [2022-11-18 18:49:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:44,539 INFO L93 Difference]: Finished difference Result 8815 states and 40841 transitions. [2022-11-18 18:49:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:49:44,540 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 13 [2022-11-18 18:49:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:44,627 INFO L225 Difference]: With dead ends: 8815 [2022-11-18 18:49:44,627 INFO L226 Difference]: Without dead ends: 8815 [2022-11-18 18:49:44,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:49:44,628 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:44,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 23 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 131 Unchecked, 0.7s Time] [2022-11-18 18:49:44,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8815 states. [2022-11-18 18:49:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8815 to 7484. [2022-11-18 18:49:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7484 states, 7470 states have (on average 4.617670682730924) internal successors, (34494), 7483 states have internal predecessors, (34494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7484 states to 7484 states and 34494 transitions. [2022-11-18 18:49:44,852 INFO L78 Accepts]: Start accepts. Automaton has 7484 states and 34494 transitions. Word has length 13 [2022-11-18 18:49:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:44,852 INFO L495 AbstractCegarLoop]: Abstraction has 7484 states and 34494 transitions. [2022-11-18 18:49:44,852 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) [2022-11-18 18:49:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 7484 states and 34494 transitions. [2022-11-18 18:49:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:49:44,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:44,854 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:44,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:45,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:45,055 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:49:45,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:45,056 INFO L85 PathProgramCache]: Analyzing trace with hash -946056767, now seen corresponding path program 8 times [2022-11-18 18:49:45,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:49:45,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024089713] [2022-11-18 18:49:45,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:49:45,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:45,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:49:45,057 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:49:45,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-18 18:49:45,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:49:45,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:45,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:49:45,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:45,475 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:49:45,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:49:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:45,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:46,981 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:49:46,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024089713] [2022-11-18 18:49:46,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024089713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:46,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:49:46,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 18:49:46,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529368356] [2022-11-18 18:49:46,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:46,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:49:46,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:49:46,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:49:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:49:46,984 INFO L87 Difference]: Start difference. First operand 7484 states and 34494 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:49,287 INFO L93 Difference]: Finished difference Result 7546 states and 34724 transitions. [2022-11-18 18:49:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:49:49,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 13 [2022-11-18 18:49:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:49,315 INFO L225 Difference]: With dead ends: 7546 [2022-11-18 18:49:49,315 INFO L226 Difference]: Without dead ends: 7546 [2022-11-18 18:49:49,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:49:49,315 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:49,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 34 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 80 Unchecked, 1.1s Time] [2022-11-18 18:49:49,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7546 states. [2022-11-18 18:49:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7546 to 7499. [2022-11-18 18:49:49,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7499 states, 7485 states have (on average 4.615364061456246) internal successors, (34546), 7498 states have internal predecessors, (34546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7499 states to 7499 states and 34546 transitions. [2022-11-18 18:49:49,543 INFO L78 Accepts]: Start accepts. Automaton has 7499 states and 34546 transitions. Word has length 13 [2022-11-18 18:49:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:49,543 INFO L495 AbstractCegarLoop]: Abstraction has 7499 states and 34546 transitions. [2022-11-18 18:49:49,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 7499 states and 34546 transitions. [2022-11-18 18:49:49,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:49:49,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:49,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:49,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:49,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:49,748 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:49:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:49,748 INFO L85 PathProgramCache]: Analyzing trace with hash -946061076, now seen corresponding path program 1 times [2022-11-18 18:49:49,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:49:49,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401162192] [2022-11-18 18:49:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:49,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:49,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:49:49,750 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:49:49,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-18 18:49:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:49,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:49:49,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:50,137 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:49:50,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:49:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:49:50,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:49:51,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:49:51,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401162192] [2022-11-18 18:49:51,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401162192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:51,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:49:51,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:49:51,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125808211] [2022-11-18 18:49:51,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:51,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:49:51,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:49:51,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:49:51,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:49:51,269 INFO L87 Difference]: Start difference. First operand 7499 states and 34546 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) [2022-11-18 18:49:52,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:52,149 INFO L93 Difference]: Finished difference Result 8567 states and 40241 transitions. [2022-11-18 18:49:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:49:52,151 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 13 [2022-11-18 18:49:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:52,243 INFO L225 Difference]: With dead ends: 8567 [2022-11-18 18:49:52,243 INFO L226 Difference]: Without dead ends: 8567 [2022-11-18 18:49:52,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:49:52,244 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:52,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 35 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 110 Unchecked, 0.8s Time] [2022-11-18 18:49:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8567 states. [2022-11-18 18:49:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8567 to 7499. [2022-11-18 18:49:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7499 states, 7485 states have (on average 4.615364061456246) internal successors, (34546), 7498 states have internal predecessors, (34546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7499 states to 7499 states and 34546 transitions. [2022-11-18 18:49:52,470 INFO L78 Accepts]: Start accepts. Automaton has 7499 states and 34546 transitions. Word has length 13 [2022-11-18 18:49:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:52,470 INFO L495 AbstractCegarLoop]: Abstraction has 7499 states and 34546 transitions. [2022-11-18 18:49:52,470 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) [2022-11-18 18:49:52,471 INFO L276 IsEmpty]: Start isEmpty. Operand 7499 states and 34546 transitions. [2022-11-18 18:49:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:49:52,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:52,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:52,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-18 18:49:52,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:52,673 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:49:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:52,674 INFO L85 PathProgramCache]: Analyzing trace with hash -946057077, now seen corresponding path program 4 times [2022-11-18 18:49:52,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:49:52,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490492890] [2022-11-18 18:49:52,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:49:52,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:52,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:49:52,675 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:49:52,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-18 18:49:52,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:49:52,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:52,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:49:52,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:53,043 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:49:53,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:49:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:49:53,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:49:54,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:49:54,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490492890] [2022-11-18 18:49:54,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490492890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:54,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:49:54,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:49:54,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894184798] [2022-11-18 18:49:54,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:54,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:49:54,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:49:54,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:49:54,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:49:54,164 INFO L87 Difference]: Start difference. First operand 7499 states and 34546 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) [2022-11-18 18:49:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:54,795 INFO L93 Difference]: Finished difference Result 7674 states and 35360 transitions. [2022-11-18 18:49:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:49:54,797 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 13 [2022-11-18 18:49:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:54,831 INFO L225 Difference]: With dead ends: 7674 [2022-11-18 18:49:54,831 INFO L226 Difference]: Without dead ends: 7674 [2022-11-18 18:49:54,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:49:54,832 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:54,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 65 Unchecked, 0.5s Time] [2022-11-18 18:49:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7674 states. [2022-11-18 18:49:55,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7674 to 7499. [2022-11-18 18:49:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7499 states, 7485 states have (on average 4.615364061456246) internal successors, (34546), 7498 states have internal predecessors, (34546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7499 states to 7499 states and 34546 transitions. [2022-11-18 18:49:55,165 INFO L78 Accepts]: Start accepts. Automaton has 7499 states and 34546 transitions. Word has length 13 [2022-11-18 18:49:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:55,165 INFO L495 AbstractCegarLoop]: Abstraction has 7499 states and 34546 transitions. [2022-11-18 18:49:55,165 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) [2022-11-18 18:49:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 7499 states and 34546 transitions. [2022-11-18 18:49:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:49:55,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:55,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:55,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-18 18:49:55,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:55,377 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:49:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash -946190346, now seen corresponding path program 2 times [2022-11-18 18:49:55,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:49:55,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644754021] [2022-11-18 18:49:55,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:49:55,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:55,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:49:55,379 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:49:55,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-18 18:49:55,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:49:55,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:55,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:49:55,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:55,843 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:49:55,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:49:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:49:56,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:49:56,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:49:56,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644754021] [2022-11-18 18:49:56,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644754021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:56,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:49:56,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:49:56,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353918445] [2022-11-18 18:49:56,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:56,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:49:56,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:49:56,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:49:56,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:49:56,965 INFO L87 Difference]: Start difference. First operand 7499 states and 34546 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) [2022-11-18 18:49:58,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:58,003 INFO L93 Difference]: Finished difference Result 9170 states and 43347 transitions. [2022-11-18 18:49:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:49:58,006 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 13 [2022-11-18 18:49:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:58,042 INFO L225 Difference]: With dead ends: 9170 [2022-11-18 18:49:58,043 INFO L226 Difference]: Without dead ends: 9170 [2022-11-18 18:49:58,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:49:58,043 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:58,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 29 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 104 Unchecked, 0.8s Time] [2022-11-18 18:49:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9170 states. [2022-11-18 18:49:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9170 to 7713. [2022-11-18 18:49:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7713 states, 7699 states have (on average 4.633588777763346) internal successors, (35674), 7712 states have internal predecessors, (35674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7713 states to 7713 states and 35674 transitions. [2022-11-18 18:49:58,348 INFO L78 Accepts]: Start accepts. Automaton has 7713 states and 35674 transitions. Word has length 13 [2022-11-18 18:49:58,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:58,348 INFO L495 AbstractCegarLoop]: Abstraction has 7713 states and 35674 transitions. [2022-11-18 18:49:58,348 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) [2022-11-18 18:49:58,348 INFO L276 IsEmpty]: Start isEmpty. Operand 7713 states and 35674 transitions. [2022-11-18 18:49:58,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:49:58,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:58,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:58,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:58,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:58,563 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:49:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash -946066377, now seen corresponding path program 5 times [2022-11-18 18:49:58,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:49:58,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021703718] [2022-11-18 18:49:58,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:49:58,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:49:58,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:49:58,565 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:49:58,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-18 18:49:58,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:49:58,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:58,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:49:58,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:59,055 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:49:59,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:49:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:59,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:00,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:00,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021703718] [2022-11-18 18:50:00,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021703718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:00,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:00,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:50:00,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335414897] [2022-11-18 18:50:00,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:00,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:50:00,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:00,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:50:00,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:50:00,326 INFO L87 Difference]: Start difference. First operand 7713 states and 35674 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:01,067 INFO L93 Difference]: Finished difference Result 7842 states and 36258 transitions. [2022-11-18 18:50:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:50:01,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 13 [2022-11-18 18:50:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:01,104 INFO L225 Difference]: With dead ends: 7842 [2022-11-18 18:50:01,104 INFO L226 Difference]: Without dead ends: 7842 [2022-11-18 18:50:01,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:50:01,105 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:01,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 47 Unchecked, 0.6s Time] [2022-11-18 18:50:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2022-11-18 18:50:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 7713. [2022-11-18 18:50:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7713 states, 7699 states have (on average 4.633588777763346) internal successors, (35674), 7712 states have internal predecessors, (35674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7713 states to 7713 states and 35674 transitions. [2022-11-18 18:50:01,346 INFO L78 Accepts]: Start accepts. Automaton has 7713 states and 35674 transitions. Word has length 13 [2022-11-18 18:50:01,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:01,346 INFO L495 AbstractCegarLoop]: Abstraction has 7713 states and 35674 transitions. [2022-11-18 18:50:01,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:01,347 INFO L276 IsEmpty]: Start isEmpty. Operand 7713 states and 35674 transitions. [2022-11-18 18:50:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:01,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:01,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:01,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-18 18:50:01,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:01,550 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:01,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:01,551 INFO L85 PathProgramCache]: Analyzing trace with hash -945238956, now seen corresponding path program 3 times [2022-11-18 18:50:01,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:01,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505761958] [2022-11-18 18:50:01,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:50:01,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:01,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:01,555 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:01,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-18 18:50:01,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:50:01,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:01,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:50:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:02,003 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:02,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:02,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:03,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:03,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505761958] [2022-11-18 18:50:03,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505761958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:03,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:03,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:50:03,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923678093] [2022-11-18 18:50:03,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:03,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:03,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:03,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:03,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:03,142 INFO L87 Difference]: Start difference. First operand 7713 states and 35674 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) [2022-11-18 18:50:03,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:03,728 INFO L93 Difference]: Finished difference Result 8028 states and 37359 transitions. [2022-11-18 18:50:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:50:03,730 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 13 [2022-11-18 18:50:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:03,757 INFO L225 Difference]: With dead ends: 8028 [2022-11-18 18:50:03,757 INFO L226 Difference]: Without dead ends: 8028 [2022-11-18 18:50:03,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:03,758 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:03,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 46 Unchecked, 0.5s Time] [2022-11-18 18:50:03,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8028 states. [2022-11-18 18:50:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8028 to 7800. [2022-11-18 18:50:03,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7800 states, 7786 states have (on average 4.646930387875674) internal successors, (36181), 7799 states have internal predecessors, (36181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7800 states to 7800 states and 36181 transitions. [2022-11-18 18:50:04,005 INFO L78 Accepts]: Start accepts. Automaton has 7800 states and 36181 transitions. Word has length 13 [2022-11-18 18:50:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:04,006 INFO L495 AbstractCegarLoop]: Abstraction has 7800 states and 36181 transitions. [2022-11-18 18:50:04,006 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) [2022-11-18 18:50:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 7800 states and 36181 transitions. [2022-11-18 18:50:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:04,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:04,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:04,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:04,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:04,209 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:04,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1112294856, now seen corresponding path program 4 times [2022-11-18 18:50:04,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:04,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956249697] [2022-11-18 18:50:04,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:50:04,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:04,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:04,211 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:04,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-18 18:50:04,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:50:04,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:04,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:50:04,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:04,614 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:04,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:04,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:05,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:05,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956249697] [2022-11-18 18:50:05,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956249697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:05,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:05,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:50:05,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681629310] [2022-11-18 18:50:05,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:05,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:05,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:05,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:05,551 INFO L87 Difference]: Start difference. First operand 7800 states and 36181 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) [2022-11-18 18:50:06,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:06,212 INFO L93 Difference]: Finished difference Result 9187 states and 43698 transitions. [2022-11-18 18:50:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:50:06,214 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 13 [2022-11-18 18:50:06,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:06,249 INFO L225 Difference]: With dead ends: 9187 [2022-11-18 18:50:06,249 INFO L226 Difference]: Without dead ends: 9187 [2022-11-18 18:50:06,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:06,249 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:06,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 23 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 82 Unchecked, 0.5s Time] [2022-11-18 18:50:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9187 states. [2022-11-18 18:50:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9187 to 7807. [2022-11-18 18:50:06,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7807 states, 7793 states have (on average 4.646734248684717) internal successors, (36212), 7806 states have internal predecessors, (36212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7807 states to 7807 states and 36212 transitions. [2022-11-18 18:50:06,521 INFO L78 Accepts]: Start accepts. Automaton has 7807 states and 36212 transitions. Word has length 13 [2022-11-18 18:50:06,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:06,521 INFO L495 AbstractCegarLoop]: Abstraction has 7807 states and 36212 transitions. [2022-11-18 18:50:06,521 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) [2022-11-18 18:50:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7807 states and 36212 transitions. [2022-11-18 18:50:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:06,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:06,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:06,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:06,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:06,725 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:06,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1112290857, now seen corresponding path program 6 times [2022-11-18 18:50:06,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:06,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198026980] [2022-11-18 18:50:06,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:50:06,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:06,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:06,726 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:06,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-18 18:50:06,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:50:06,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:06,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:50:06,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:07,157 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:07,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:07,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:08,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:08,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198026980] [2022-11-18 18:50:08,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198026980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:08,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:08,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:50:08,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394974300] [2022-11-18 18:50:08,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:08,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:08,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:08,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:08,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:08,272 INFO L87 Difference]: Start difference. First operand 7807 states and 36212 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) [2022-11-18 18:50:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:09,018 INFO L93 Difference]: Finished difference Result 8057 states and 37367 transitions. [2022-11-18 18:50:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:50:09,020 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 13 [2022-11-18 18:50:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:09,059 INFO L225 Difference]: With dead ends: 8057 [2022-11-18 18:50:09,060 INFO L226 Difference]: Without dead ends: 8057 [2022-11-18 18:50:09,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:09,060 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:09,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 47 Unchecked, 0.6s Time] [2022-11-18 18:50:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8057 states. [2022-11-18 18:50:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8057 to 7857. [2022-11-18 18:50:09,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7857 states, 7843 states have (on average 4.64796633941094) internal successors, (36454), 7856 states have internal predecessors, (36454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:09,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7857 states to 7857 states and 36454 transitions. [2022-11-18 18:50:09,328 INFO L78 Accepts]: Start accepts. Automaton has 7857 states and 36454 transitions. Word has length 13 [2022-11-18 18:50:09,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:09,329 INFO L495 AbstractCegarLoop]: Abstraction has 7857 states and 36454 transitions. [2022-11-18 18:50:09,329 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) [2022-11-18 18:50:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand 7857 states and 36454 transitions. [2022-11-18 18:50:09,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:09,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:09,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:09,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-18 18:50:09,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:09,533 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:09,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:09,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1112300157, now seen corresponding path program 7 times [2022-11-18 18:50:09,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:09,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775806238] [2022-11-18 18:50:09,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:50:09,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:09,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:09,535 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:09,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-18 18:50:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:09,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:50:09,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:09,964 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:09,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:10,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:11,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:11,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775806238] [2022-11-18 18:50:11,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775806238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:11,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:11,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:50:11,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335129512] [2022-11-18 18:50:11,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:11,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:11,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:11,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:11,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:11,114 INFO L87 Difference]: Start difference. First operand 7857 states and 36454 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) [2022-11-18 18:50:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:11,867 INFO L93 Difference]: Finished difference Result 9484 states and 44950 transitions. [2022-11-18 18:50:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:50:11,869 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 13 [2022-11-18 18:50:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:11,908 INFO L225 Difference]: With dead ends: 9484 [2022-11-18 18:50:11,908 INFO L226 Difference]: Without dead ends: 9484 [2022-11-18 18:50:11,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:11,911 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:11,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 29 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 108 Unchecked, 0.6s Time] [2022-11-18 18:50:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9484 states. [2022-11-18 18:50:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9484 to 7896. [2022-11-18 18:50:12,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7896 states, 7882 states have (on average 4.6432377569144885) internal successors, (36598), 7895 states have internal predecessors, (36598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7896 states to 7896 states and 36598 transitions. [2022-11-18 18:50:12,111 INFO L78 Accepts]: Start accepts. Automaton has 7896 states and 36598 transitions. Word has length 13 [2022-11-18 18:50:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:12,111 INFO L495 AbstractCegarLoop]: Abstraction has 7896 states and 36598 transitions. [2022-11-18 18:50:12,111 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) [2022-11-18 18:50:12,111 INFO L276 IsEmpty]: Start isEmpty. Operand 7896 states and 36598 transitions. [2022-11-18 18:50:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:12,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:12,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:12,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-18 18:50:12,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:12,315 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:12,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:12,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1112694477, now seen corresponding path program 8 times [2022-11-18 18:50:12,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:12,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375319785] [2022-11-18 18:50:12,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:50:12,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:12,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:12,316 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:12,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-18 18:50:12,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:50:12,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:50:12,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:12,728 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:12,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:13,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:13,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:13,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375319785] [2022-11-18 18:50:13,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375319785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:13,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:13,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:50:13,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795172064] [2022-11-18 18:50:13,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:13,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:13,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:13,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:13,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:13,908 INFO L87 Difference]: Start difference. First operand 7896 states and 36598 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) [2022-11-18 18:50:14,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:14,789 INFO L93 Difference]: Finished difference Result 9439 states and 44484 transitions. [2022-11-18 18:50:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:50:14,791 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 13 [2022-11-18 18:50:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:14,826 INFO L225 Difference]: With dead ends: 9439 [2022-11-18 18:50:14,827 INFO L226 Difference]: Without dead ends: 9439 [2022-11-18 18:50:14,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:14,827 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:14,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 20 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 87 Unchecked, 0.8s Time] [2022-11-18 18:50:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9439 states. [2022-11-18 18:50:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9439 to 8039. [2022-11-18 18:50:14,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8039 states, 8025 states have (on average 4.673146417445483) internal successors, (37502), 8038 states have internal predecessors, (37502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8039 states to 8039 states and 37502 transitions. [2022-11-18 18:50:15,024 INFO L78 Accepts]: Start accepts. Automaton has 8039 states and 37502 transitions. Word has length 13 [2022-11-18 18:50:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:15,025 INFO L495 AbstractCegarLoop]: Abstraction has 8039 states and 37502 transitions. [2022-11-18 18:50:15,025 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) [2022-11-18 18:50:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 8039 states and 37502 transitions. [2022-11-18 18:50:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:15,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:15,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:15,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-18 18:50:15,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:15,228 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:15,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1113005097, now seen corresponding path program 9 times [2022-11-18 18:50:15,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:15,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599055909] [2022-11-18 18:50:15,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:50:15,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:15,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:15,235 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:15,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-18 18:50:15,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:50:15,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:15,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:50:15,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:15,646 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:15,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:16,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:16,705 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:16,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599055909] [2022-11-18 18:50:16,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599055909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:16,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:16,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:50:16,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229248593] [2022-11-18 18:50:16,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:16,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:16,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:16,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:16,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:16,706 INFO L87 Difference]: Start difference. First operand 8039 states and 37502 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) [2022-11-18 18:50:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:17,871 INFO L93 Difference]: Finished difference Result 9573 states and 44983 transitions. [2022-11-18 18:50:17,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:50:17,873 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 13 [2022-11-18 18:50:17,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:17,915 INFO L225 Difference]: With dead ends: 9573 [2022-11-18 18:50:17,915 INFO L226 Difference]: Without dead ends: 9573 [2022-11-18 18:50:17,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:17,916 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:17,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 25 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 161 Unchecked, 1.0s Time] [2022-11-18 18:50:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9573 states. [2022-11-18 18:50:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9573 to 8031. [2022-11-18 18:50:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8031 states, 8017 states have (on average 4.674816015966072) internal successors, (37478), 8030 states have internal predecessors, (37478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8031 states to 8031 states and 37478 transitions. [2022-11-18 18:50:18,173 INFO L78 Accepts]: Start accepts. Automaton has 8031 states and 37478 transitions. Word has length 13 [2022-11-18 18:50:18,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:18,174 INFO L495 AbstractCegarLoop]: Abstraction has 8031 states and 37478 transitions. [2022-11-18 18:50:18,174 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) [2022-11-18 18:50:18,174 INFO L276 IsEmpty]: Start isEmpty. Operand 8031 states and 37478 transitions. [2022-11-18 18:50:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:18,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:18,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:18,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-18 18:50:18,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:18,377 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:18,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:18,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1818297192, now seen corresponding path program 5 times [2022-11-18 18:50:18,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:18,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069243124] [2022-11-18 18:50:18,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:50:18,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:18,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:18,379 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:18,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-18 18:50:18,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:50:18,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:18,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:50:18,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:18,807 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:18,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:19,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:20,084 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:20,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069243124] [2022-11-18 18:50:20,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069243124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:20,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:20,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:50:20,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996381735] [2022-11-18 18:50:20,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:20,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:50:20,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:50:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:50:20,086 INFO L87 Difference]: Start difference. First operand 8031 states and 37478 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:20,774 INFO L93 Difference]: Finished difference Result 8233 states and 38535 transitions. [2022-11-18 18:50:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:50:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 13 [2022-11-18 18:50:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:20,816 INFO L225 Difference]: With dead ends: 8233 [2022-11-18 18:50:20,816 INFO L226 Difference]: Without dead ends: 8233 [2022-11-18 18:50:20,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:50:20,817 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:20,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 28 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 74 Unchecked, 0.5s Time] [2022-11-18 18:50:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8233 states. [2022-11-18 18:50:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8233 to 8033. [2022-11-18 18:50:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8033 states, 8019 states have (on average 4.674897119341564) internal successors, (37488), 8032 states have internal predecessors, (37488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:21,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8033 states to 8033 states and 37488 transitions. [2022-11-18 18:50:21,149 INFO L78 Accepts]: Start accepts. Automaton has 8033 states and 37488 transitions. Word has length 13 [2022-11-18 18:50:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:21,149 INFO L495 AbstractCegarLoop]: Abstraction has 8033 states and 37488 transitions. [2022-11-18 18:50:21,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:21,150 INFO L276 IsEmpty]: Start isEmpty. Operand 8033 states and 37488 transitions. [2022-11-18 18:50:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:21,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:21,153 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:21,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-18 18:50:21,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:21,360 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:21,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1813896773, now seen corresponding path program 9 times [2022-11-18 18:50:21,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:21,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130502987] [2022-11-18 18:50:21,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:50:21,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:21,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:21,362 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:21,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-18 18:50:21,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:50:21,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:21,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:50:21,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:21,792 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:21,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:22,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:23,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:23,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130502987] [2022-11-18 18:50:23,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130502987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:23,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:23,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 18:50:23,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966243229] [2022-11-18 18:50:23,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:23,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:50:23,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:23,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:50:23,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:50:23,439 INFO L87 Difference]: Start difference. First operand 8033 states and 37488 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:25,930 INFO L93 Difference]: Finished difference Result 8080 states and 37700 transitions. [2022-11-18 18:50:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 18:50:25,932 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 13 [2022-11-18 18:50:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:25,964 INFO L225 Difference]: With dead ends: 8080 [2022-11-18 18:50:25,964 INFO L226 Difference]: Without dead ends: 8080 [2022-11-18 18:50:25,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:50:25,964 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:25,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 91 Unchecked, 1.2s Time] [2022-11-18 18:50:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2022-11-18 18:50:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 8035. [2022-11-18 18:50:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8035 states, 8021 states have (on average 4.674728836803391) internal successors, (37496), 8034 states have internal predecessors, (37496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:26,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8035 states to 8035 states and 37496 transitions. [2022-11-18 18:50:26,150 INFO L78 Accepts]: Start accepts. Automaton has 8035 states and 37496 transitions. Word has length 13 [2022-11-18 18:50:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:26,150 INFO L495 AbstractCegarLoop]: Abstraction has 8035 states and 37496 transitions. [2022-11-18 18:50:26,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 8035 states and 37496 transitions. [2022-11-18 18:50:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:26,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:26,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:26,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-18 18:50:26,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:26,354 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:26,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:26,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1813901082, now seen corresponding path program 6 times [2022-11-18 18:50:26,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:26,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276811585] [2022-11-18 18:50:26,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:50:26,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:26,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:26,356 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:26,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-18 18:50:26,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:50:26,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:26,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:50:26,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:26,819 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:26,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:27,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:27,878 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:27,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276811585] [2022-11-18 18:50:27,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276811585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:27,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:27,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:50:27,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426549888] [2022-11-18 18:50:27,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:27,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:27,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:27,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:27,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:27,879 INFO L87 Difference]: Start difference. First operand 8035 states and 37496 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) [2022-11-18 18:50:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:28,804 INFO L93 Difference]: Finished difference Result 9186 states and 43553 transitions. [2022-11-18 18:50:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:50:28,806 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 13 [2022-11-18 18:50:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:28,850 INFO L225 Difference]: With dead ends: 9186 [2022-11-18 18:50:28,850 INFO L226 Difference]: Without dead ends: 9186 [2022-11-18 18:50:28,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:28,851 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:28,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 20 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 79 Unchecked, 0.8s Time] [2022-11-18 18:50:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9186 states. [2022-11-18 18:50:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9186 to 8050. [2022-11-18 18:50:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8050 states, 8036 states have (on average 4.673718267794923) internal successors, (37558), 8049 states have internal predecessors, (37558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8050 states to 8050 states and 37558 transitions. [2022-11-18 18:50:29,126 INFO L78 Accepts]: Start accepts. Automaton has 8050 states and 37558 transitions. Word has length 13 [2022-11-18 18:50:29,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:29,126 INFO L495 AbstractCegarLoop]: Abstraction has 8050 states and 37558 transitions. [2022-11-18 18:50:29,126 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) [2022-11-18 18:50:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 8050 states and 37558 transitions. [2022-11-18 18:50:29,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:29,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:29,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:29,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-18 18:50:29,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:29,331 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:29,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1813897083, now seen corresponding path program 10 times [2022-11-18 18:50:29,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:29,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54302262] [2022-11-18 18:50:29,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:50:29,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:29,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:29,334 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:29,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-18 18:50:29,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:50:29,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:29,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:50:29,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:29,787 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:29,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:30,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:30,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:30,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54302262] [2022-11-18 18:50:30,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54302262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:30,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:30,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:50:30,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894264885] [2022-11-18 18:50:30,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:30,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:30,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:30,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:30,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:30,933 INFO L87 Difference]: Start difference. First operand 8050 states and 37558 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) [2022-11-18 18:50:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:31,353 INFO L93 Difference]: Finished difference Result 8175 states and 38139 transitions. [2022-11-18 18:50:31,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:50:31,355 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 13 [2022-11-18 18:50:31,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:31,496 INFO L225 Difference]: With dead ends: 8175 [2022-11-18 18:50:31,496 INFO L226 Difference]: Without dead ends: 8175 [2022-11-18 18:50:31,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:31,497 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:31,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-18 18:50:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2022-11-18 18:50:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 8051. [2022-11-18 18:50:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8051 states, 8037 states have (on average 4.6735100161751895) internal successors, (37561), 8050 states have internal predecessors, (37561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8051 states to 8051 states and 37561 transitions. [2022-11-18 18:50:31,678 INFO L78 Accepts]: Start accepts. Automaton has 8051 states and 37561 transitions. Word has length 13 [2022-11-18 18:50:31,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:31,678 INFO L495 AbstractCegarLoop]: Abstraction has 8051 states and 37561 transitions. [2022-11-18 18:50:31,678 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) [2022-11-18 18:50:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 8051 states and 37561 transitions. [2022-11-18 18:50:31,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:31,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:31,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:31,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-18 18:50:31,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:31,882 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:31,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:31,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1813906383, now seen corresponding path program 11 times [2022-11-18 18:50:31,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:31,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562293523] [2022-11-18 18:50:31,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:50:31,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:31,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:31,885 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:31,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-18 18:50:32,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:50:32,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:32,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:50:32,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:32,309 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:32,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:32,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:33,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:33,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562293523] [2022-11-18 18:50:33,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562293523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:33,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:33,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:50:33,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359319514] [2022-11-18 18:50:33,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:33,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:50:33,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:33,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:50:33,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:50:33,567 INFO L87 Difference]: Start difference. First operand 8051 states and 37561 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:34,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:34,295 INFO L93 Difference]: Finished difference Result 8184 states and 38163 transitions. [2022-11-18 18:50:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:50:34,297 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 13 [2022-11-18 18:50:34,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:34,326 INFO L225 Difference]: With dead ends: 8184 [2022-11-18 18:50:34,327 INFO L226 Difference]: Without dead ends: 8184 [2022-11-18 18:50:34,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:50:34,327 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:34,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 32 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 97 Unchecked, 0.6s Time] [2022-11-18 18:50:34,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2022-11-18 18:50:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 8050. [2022-11-18 18:50:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8050 states, 8036 states have (on average 4.673593827775012) internal successors, (37557), 8049 states have internal predecessors, (37557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:34,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8050 states to 8050 states and 37557 transitions. [2022-11-18 18:50:34,513 INFO L78 Accepts]: Start accepts. Automaton has 8050 states and 37557 transitions. Word has length 13 [2022-11-18 18:50:34,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:34,513 INFO L495 AbstractCegarLoop]: Abstraction has 8050 states and 37557 transitions. [2022-11-18 18:50:34,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:34,513 INFO L276 IsEmpty]: Start isEmpty. Operand 8050 states and 37557 transitions. [2022-11-18 18:50:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:34,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:34,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:34,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:34,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:34,716 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:34,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1788812472, now seen corresponding path program 7 times [2022-11-18 18:50:34,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:34,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572158435] [2022-11-18 18:50:34,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:50:34,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:34,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:34,718 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:34,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-18 18:50:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:34,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:50:34,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:35,148 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:35,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:35,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:36,183 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:36,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572158435] [2022-11-18 18:50:36,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572158435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:36,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:36,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:50:36,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206591694] [2022-11-18 18:50:36,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:36,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:36,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:36,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:36,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:36,184 INFO L87 Difference]: Start difference. First operand 8050 states and 37557 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) [2022-11-18 18:50:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:36,861 INFO L93 Difference]: Finished difference Result 8234 states and 38503 transitions. [2022-11-18 18:50:36,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:50:36,862 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 13 [2022-11-18 18:50:36,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:36,893 INFO L225 Difference]: With dead ends: 8234 [2022-11-18 18:50:36,893 INFO L226 Difference]: Without dead ends: 8234 [2022-11-18 18:50:36,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:36,893 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:36,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 17 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 53 Unchecked, 0.6s Time] [2022-11-18 18:50:36,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8234 states. [2022-11-18 18:50:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8234 to 8052. [2022-11-18 18:50:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8052 states, 8038 states have (on average 4.67355063448619) internal successors, (37566), 8051 states have internal predecessors, (37566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8052 states to 8052 states and 37566 transitions. [2022-11-18 18:50:37,080 INFO L78 Accepts]: Start accepts. Automaton has 8052 states and 37566 transitions. Word has length 13 [2022-11-18 18:50:37,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:37,080 INFO L495 AbstractCegarLoop]: Abstraction has 8052 states and 37566 transitions. [2022-11-18 18:50:37,080 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) [2022-11-18 18:50:37,081 INFO L276 IsEmpty]: Start isEmpty. Operand 8052 states and 37566 transitions. [2022-11-18 18:50:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:37,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:37,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:37,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-18 18:50:37,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:37,283 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:37,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:37,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1788804102, now seen corresponding path program 8 times [2022-11-18 18:50:37,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:37,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568392161] [2022-11-18 18:50:37,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:50:37,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:37,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:37,285 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:37,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-18 18:50:37,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:50:37,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:37,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:50:37,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:37,708 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:37,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:38,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:38,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:38,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568392161] [2022-11-18 18:50:38,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568392161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:38,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:38,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:50:38,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527207214] [2022-11-18 18:50:38,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:38,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:38,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:38,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:38,823 INFO L87 Difference]: Start difference. First operand 8052 states and 37566 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) [2022-11-18 18:50:39,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:39,389 INFO L93 Difference]: Finished difference Result 8440 states and 39628 transitions. [2022-11-18 18:50:39,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:50:39,391 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 13 [2022-11-18 18:50:39,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:39,422 INFO L225 Difference]: With dead ends: 8440 [2022-11-18 18:50:39,423 INFO L226 Difference]: Without dead ends: 8440 [2022-11-18 18:50:39,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:39,423 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:39,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 44 Unchecked, 0.5s Time] [2022-11-18 18:50:39,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8440 states. [2022-11-18 18:50:39,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8440 to 8104. [2022-11-18 18:50:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8104 states, 8090 states have (on average 4.6813349814585905) internal successors, (37872), 8103 states have internal predecessors, (37872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8104 states to 8104 states and 37872 transitions. [2022-11-18 18:50:39,608 INFO L78 Accepts]: Start accepts. Automaton has 8104 states and 37872 transitions. Word has length 13 [2022-11-18 18:50:39,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:39,609 INFO L495 AbstractCegarLoop]: Abstraction has 8104 states and 37872 transitions. [2022-11-18 18:50:39,609 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) [2022-11-18 18:50:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 8104 states and 37872 transitions. [2022-11-18 18:50:39,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:39,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:39,612 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:39,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-18 18:50:39,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:39,813 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:39,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:39,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1617905349, now seen corresponding path program 10 times [2022-11-18 18:50:39,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:39,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042005684] [2022-11-18 18:50:39,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:50:39,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:39,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:39,815 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:39,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-18 18:50:40,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:50:40,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:40,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:50:40,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:40,238 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:40,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:40,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:41,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:41,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042005684] [2022-11-18 18:50:41,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042005684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:41,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:41,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-18 18:50:41,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185299193] [2022-11-18 18:50:41,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:41,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:50:41,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:50:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:50:41,596 INFO L87 Difference]: Start difference. First operand 8104 states and 37872 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:42,947 INFO L93 Difference]: Finished difference Result 8106 states and 37861 transitions. [2022-11-18 18:50:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:50:42,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 13 [2022-11-18 18:50:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:42,977 INFO L225 Difference]: With dead ends: 8106 [2022-11-18 18:50:42,977 INFO L226 Difference]: Without dead ends: 8106 [2022-11-18 18:50:42,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:50:42,977 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:42,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 41 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 214 Invalid, 0 Unknown, 134 Unchecked, 1.2s Time] [2022-11-18 18:50:42,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8106 states. [2022-11-18 18:50:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8106 to 8076. [2022-11-18 18:50:43,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8076 states, 8062 states have (on average 4.682336889109402) internal successors, (37749), 8075 states have internal predecessors, (37749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8076 states to 8076 states and 37749 transitions. [2022-11-18 18:50:43,198 INFO L78 Accepts]: Start accepts. Automaton has 8076 states and 37749 transitions. Word has length 13 [2022-11-18 18:50:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:43,198 INFO L495 AbstractCegarLoop]: Abstraction has 8076 states and 37749 transitions. [2022-11-18 18:50:43,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:43,198 INFO L276 IsEmpty]: Start isEmpty. Operand 8076 states and 37749 transitions. [2022-11-18 18:50:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:43,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:43,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:43,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-18 18:50:43,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:43,401 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:43,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1997142148, now seen corresponding path program 1 times [2022-11-18 18:50:43,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:43,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160933809] [2022-11-18 18:50:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:43,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:43,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:43,403 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:43,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-18 18:50:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:43,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:50:43,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:43,810 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:43,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:44,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:44,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:44,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160933809] [2022-11-18 18:50:44,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160933809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:44,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:44,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:50:44,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916536489] [2022-11-18 18:50:44,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:44,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:44,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:44,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:44,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:44,833 INFO L87 Difference]: Start difference. First operand 8076 states and 37749 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) [2022-11-18 18:50:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:45,046 INFO L93 Difference]: Finished difference Result 8156 states and 38081 transitions. [2022-11-18 18:50:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:50:45,047 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 13 [2022-11-18 18:50:45,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:45,075 INFO L225 Difference]: With dead ends: 8156 [2022-11-18 18:50:45,075 INFO L226 Difference]: Without dead ends: 8156 [2022-11-18 18:50:45,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:45,076 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:45,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 18 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-18 18:50:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2022-11-18 18:50:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 8080. [2022-11-18 18:50:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8080 states, 8066 states have (on average 4.681998512273742) internal successors, (37765), 8079 states have internal predecessors, (37765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8080 states to 8080 states and 37765 transitions. [2022-11-18 18:50:45,384 INFO L78 Accepts]: Start accepts. Automaton has 8080 states and 37765 transitions. Word has length 13 [2022-11-18 18:50:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:45,384 INFO L495 AbstractCegarLoop]: Abstraction has 8080 states and 37765 transitions. [2022-11-18 18:50:45,384 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) [2022-11-18 18:50:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 8080 states and 37765 transitions. [2022-11-18 18:50:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:45,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:45,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:45,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-18 18:50:45,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:45,590 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:45,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1996885468, now seen corresponding path program 2 times [2022-11-18 18:50:45,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:45,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282526046] [2022-11-18 18:50:45,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:50:45,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:45,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:45,593 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:45,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-18 18:50:45,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:50:45,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:45,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:50:45,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:46,078 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:46,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:46,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:47,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:47,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282526046] [2022-11-18 18:50:47,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282526046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:47,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:47,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:50:47,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408102206] [2022-11-18 18:50:47,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:47,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:47,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:47,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:47,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:47,161 INFO L87 Difference]: Start difference. First operand 8080 states and 37765 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) [2022-11-18 18:50:47,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:47,930 INFO L93 Difference]: Finished difference Result 8280 states and 38601 transitions. [2022-11-18 18:50:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:50:47,932 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 13 [2022-11-18 18:50:47,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:47,974 INFO L225 Difference]: With dead ends: 8280 [2022-11-18 18:50:47,974 INFO L226 Difference]: Without dead ends: 8280 [2022-11-18 18:50:47,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:47,975 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:47,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 53 Unchecked, 0.6s Time] [2022-11-18 18:50:47,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8280 states. [2022-11-18 18:50:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8280 to 8118. [2022-11-18 18:50:48,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8118 states, 8104 states have (on average 4.6785538005923) internal successors, (37915), 8117 states have internal predecessors, (37915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8118 states to 8118 states and 37915 transitions. [2022-11-18 18:50:48,294 INFO L78 Accepts]: Start accepts. Automaton has 8118 states and 37915 transitions. Word has length 13 [2022-11-18 18:50:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:48,294 INFO L495 AbstractCegarLoop]: Abstraction has 8118 states and 37915 transitions. [2022-11-18 18:50:48,295 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) [2022-11-18 18:50:48,295 INFO L276 IsEmpty]: Start isEmpty. Operand 8118 states and 37915 transitions. [2022-11-18 18:50:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:48,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:48,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:48,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-18 18:50:48,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:48,500 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:50:48,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:48,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1996738528, now seen corresponding path program 3 times [2022-11-18 18:50:48,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:48,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850802795] [2022-11-18 18:50:48,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:50:48,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:48,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:48,502 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:48,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-18 18:50:48,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:50:48,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:48,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:50:48,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:48,945 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:50:48,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:50:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:49,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:50:50,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:50,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850802795] [2022-11-18 18:50:50,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850802795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:50,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:50:50,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:50:50,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477286809] [2022-11-18 18:50:50,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:50,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:50,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:50,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:50,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:50,029 INFO L87 Difference]: Start difference. First operand 8118 states and 37915 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) [2022-11-18 18:50:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:50,698 INFO L93 Difference]: Finished difference Result 8232 states and 38393 transitions. [2022-11-18 18:50:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:50:50,699 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 13 [2022-11-18 18:50:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:50,725 INFO L225 Difference]: With dead ends: 8232 [2022-11-18 18:50:50,725 INFO L226 Difference]: Without dead ends: 8232 [2022-11-18 18:50:50,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:50,726 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:50,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 27 Unchecked, 0.5s Time] [2022-11-18 18:50:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2022-11-18 18:50:50,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 8138. [2022-11-18 18:50:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8138 states, 8124 states have (on average 4.676883308714919) internal successors, (37995), 8137 states have internal predecessors, (37995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8138 states to 8138 states and 37995 transitions. [2022-11-18 18:50:50,901 INFO L78 Accepts]: Start accepts. Automaton has 8138 states and 37995 transitions. Word has length 13 [2022-11-18 18:50:50,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:50,901 INFO L495 AbstractCegarLoop]: Abstraction has 8138 states and 37995 transitions. [2022-11-18 18:50:50,902 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) [2022-11-18 18:50:50,902 INFO L276 IsEmpty]: Start isEmpty. Operand 8138 states and 37995 transitions. [2022-11-18 18:50:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:50:50,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:50,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:50,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-18 18:50:51,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:51,105 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === WARNING: YOUR LOGFILE WAS TOO LONG, SOME LINES IN THE MIDDLE WERE REMOVED. [2022-11-18 18:52:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 5427 states and 24490 transitions. [2022-11-18 18:52:20,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:52:20,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:20,564 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:20,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-11-18 18:52:20,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:20,765 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:52:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:20,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1506927280, now seen corresponding path program 8 times [2022-11-18 18:52:20,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:52:20,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611435045] [2022-11-18 18:52:20,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:52:20,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:20,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:52:20,766 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:52:20,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-18 18:52:21,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:52:21,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:52:21,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 18:52:21,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:21,278 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:52:21,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:52:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:21,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:52:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:23,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:52:23,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611435045] [2022-11-18 18:52:23,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611435045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:52:23,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:52:23,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-18 18:52:23,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515839246] [2022-11-18 18:52:23,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:52:23,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 18:52:23,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:52:23,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 18:52:23,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:52:23,877 INFO L87 Difference]: Start difference. First operand 5427 states and 24490 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:39,621 INFO L93 Difference]: Finished difference Result 13489 states and 57559 transitions. [2022-11-18 18:52:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 18:52:39,624 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:52:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:39,674 INFO L225 Difference]: With dead ends: 13489 [2022-11-18 18:52:39,674 INFO L226 Difference]: Without dead ends: 13489 [2022-11-18 18:52:39,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=336, Invalid=1644, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 18:52:39,675 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 899 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2530 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:39,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 208 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 717 Invalid, 0 Unknown, 2530 Unchecked, 6.1s Time] [2022-11-18 18:52:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13489 states. [2022-11-18 18:52:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13489 to 7081. [2022-11-18 18:52:39,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7081 states, 7073 states have (on average 4.63452566096423) internal successors, (32780), 7080 states have internal predecessors, (32780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7081 states to 7081 states and 32780 transitions. [2022-11-18 18:52:39,903 INFO L78 Accepts]: Start accepts. Automaton has 7081 states and 32780 transitions. Word has length 14 [2022-11-18 18:52:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:39,903 INFO L495 AbstractCegarLoop]: Abstraction has 7081 states and 32780 transitions. [2022-11-18 18:52:39,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 7081 states and 32780 transitions. [2022-11-18 18:52:39,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:52:39,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:39,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:39,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-18 18:52:40,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:40,107 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:52:40,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:40,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1443507782, now seen corresponding path program 1 times [2022-11-18 18:52:40,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:52:40,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61982801] [2022-11-18 18:52:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:40,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:40,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:52:40,108 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:52:40,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-18 18:52:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:40,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:52:40,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:40,564 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:52:40,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:52:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:52:40,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:52:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:52:41,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:52:41,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61982801] [2022-11-18 18:52:41,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61982801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:52:41,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:52:41,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:52:41,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727101309] [2022-11-18 18:52:41,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:52:41,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:52:41,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:52:41,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:52:41,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:52:41,630 INFO L87 Difference]: Start difference. First operand 7081 states and 32780 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:42,504 INFO L93 Difference]: Finished difference Result 7694 states and 35627 transitions. [2022-11-18 18:52:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:52:42,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:52:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:42,535 INFO L225 Difference]: With dead ends: 7694 [2022-11-18 18:52:42,535 INFO L226 Difference]: Without dead ends: 7694 [2022-11-18 18:52:42,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:52:42,536 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:42,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 33 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 68 Unchecked, 0.8s Time] [2022-11-18 18:52:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7694 states. [2022-11-18 18:52:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7694 to 7082. [2022-11-18 18:52:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7082 states, 7074 states have (on average 4.634294599943455) internal successors, (32783), 7081 states have internal predecessors, (32783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7082 states to 7082 states and 32783 transitions. [2022-11-18 18:52:42,718 INFO L78 Accepts]: Start accepts. Automaton has 7082 states and 32783 transitions. Word has length 14 [2022-11-18 18:52:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:42,718 INFO L495 AbstractCegarLoop]: Abstraction has 7082 states and 32783 transitions. [2022-11-18 18:52:42,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 7082 states and 32783 transitions. [2022-11-18 18:52:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:52:42,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:42,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:42,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Ended with exit code 0 [2022-11-18 18:52:42,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:42,922 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:52:42,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:42,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1443637052, now seen corresponding path program 2 times [2022-11-18 18:52:42,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:52:42,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175101205] [2022-11-18 18:52:42,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:52:42,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:42,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:52:42,924 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:52:42,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-18 18:52:43,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:52:43,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:52:43,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:52:43,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:43,412 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:52:43,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:52:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:52:43,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:52:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:52:44,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:52:44,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175101205] [2022-11-18 18:52:44,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175101205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:52:44,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:52:44,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:52:44,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309287460] [2022-11-18 18:52:44,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:52:44,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:52:44,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:52:44,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:52:44,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:52:44,612 INFO L87 Difference]: Start difference. First operand 7082 states and 32783 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:45,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:45,272 INFO L93 Difference]: Finished difference Result 7371 states and 34141 transitions. [2022-11-18 18:52:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:52:45,274 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:52:45,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:45,303 INFO L225 Difference]: With dead ends: 7371 [2022-11-18 18:52:45,303 INFO L226 Difference]: Without dead ends: 7371 [2022-11-18 18:52:45,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:52:45,304 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:45,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 28 Unchecked, 0.5s Time] [2022-11-18 18:52:45,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7371 states. [2022-11-18 18:52:45,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7371 to 7099. [2022-11-18 18:52:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7091 states have (on average 4.631927795797489) internal successors, (32845), 7098 states have internal predecessors, (32845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 32845 transitions. [2022-11-18 18:52:45,560 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 32845 transitions. Word has length 14 [2022-11-18 18:52:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:45,560 INFO L495 AbstractCegarLoop]: Abstraction has 7099 states and 32845 transitions. [2022-11-18 18:52:45,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 32845 transitions. [2022-11-18 18:52:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:52:45,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:45,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:45,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Ended with exit code 0 [2022-11-18 18:52:45,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:45,764 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:52:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:45,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1442540992, now seen corresponding path program 1 times [2022-11-18 18:52:45,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:52:45,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632630978] [2022-11-18 18:52:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:45,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:45,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:52:45,766 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:52:45,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-18 18:52:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:46,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:52:46,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:52:46,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:52:46,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:52:46,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632630978] [2022-11-18 18:52:46,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632630978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:52:46,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:52:46,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:52:46,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483580538] [2022-11-18 18:52:46,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:52:46,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:52:46,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:52:46,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:52:46,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:52:46,146 INFO L87 Difference]: Start difference. First operand 7099 states and 32845 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:46,371 INFO L93 Difference]: Finished difference Result 6957 states and 32296 transitions. [2022-11-18 18:52:46,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:52:46,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:52:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:46,401 INFO L225 Difference]: With dead ends: 6957 [2022-11-18 18:52:46,402 INFO L226 Difference]: Without dead ends: 6957 [2022-11-18 18:52:46,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:52:46,402 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:46,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 3 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:52:46,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6957 states. [2022-11-18 18:52:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6957 to 6957. [2022-11-18 18:52:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6957 states, 6952 states have (on average 4.6455696202531644) internal successors, (32296), 6956 states have internal predecessors, (32296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 32296 transitions. [2022-11-18 18:52:46,592 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 32296 transitions. Word has length 14 [2022-11-18 18:52:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:46,592 INFO L495 AbstractCegarLoop]: Abstraction has 6957 states and 32296 transitions. [2022-11-18 18:52:46,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:46,592 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 32296 transitions. [2022-11-18 18:52:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:52:46,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:46,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:46,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Ended with exit code 0 [2022-11-18 18:52:46,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:46,796 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:52:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:46,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1442685662, now seen corresponding path program 3 times [2022-11-18 18:52:46,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:52:46,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146233787] [2022-11-18 18:52:46,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:52:46,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:46,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:52:46,798 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:52:46,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-18 18:52:47,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:52:47,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:52:47,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:52:47,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:47,327 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:52:47,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:52:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:52:47,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:52:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:52:48,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:52:48,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146233787] [2022-11-18 18:52:48,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146233787] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:52:48,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:52:48,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:52:48,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357494589] [2022-11-18 18:52:48,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:52:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:52:48,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:52:48,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:52:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:52:48,471 INFO L87 Difference]: Start difference. First operand 6957 states and 32296 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:49,039 INFO L93 Difference]: Finished difference Result 7306 states and 34010 transitions. [2022-11-18 18:52:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:52:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:52:49,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:49,069 INFO L225 Difference]: With dead ends: 7306 [2022-11-18 18:52:49,069 INFO L226 Difference]: Without dead ends: 7306 [2022-11-18 18:52:49,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:52:49,070 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:49,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 17 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-18 18:52:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2022-11-18 18:52:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 6957. [2022-11-18 18:52:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6957 states, 6952 states have (on average 4.6455696202531644) internal successors, (32296), 6956 states have internal predecessors, (32296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 32296 transitions. [2022-11-18 18:52:49,247 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 32296 transitions. Word has length 14 [2022-11-18 18:52:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:49,248 INFO L495 AbstractCegarLoop]: Abstraction has 6957 states and 32296 transitions. [2022-11-18 18:52:49,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:49,248 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 32296 transitions. [2022-11-18 18:52:49,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:52:49,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:49,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:49,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Forceful destruction successful, exit code 0 [2022-11-18 18:52:49,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:49,451 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:52:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1609741562, now seen corresponding path program 4 times [2022-11-18 18:52:49,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:52:49,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217358788] [2022-11-18 18:52:49,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:52:49,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:49,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:52:49,455 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:52:49,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-18 18:52:49,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:52:49,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:52:49,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:52:49,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:49,920 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:52:49,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:52:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:52:50,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:52:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:52:51,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:52:51,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217358788] [2022-11-18 18:52:51,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217358788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:52:51,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:52:51,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:52:51,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250840382] [2022-11-18 18:52:51,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:52:51,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:52:51,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:52:51,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:52:51,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:52:51,075 INFO L87 Difference]: Start difference. First operand 6957 states and 32296 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:51,978 INFO L93 Difference]: Finished difference Result 8193 states and 38160 transitions. [2022-11-18 18:52:51,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:52:51,980 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:52:51,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:52,009 INFO L225 Difference]: With dead ends: 8193 [2022-11-18 18:52:52,009 INFO L226 Difference]: Without dead ends: 8193 [2022-11-18 18:52:52,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:52:52,010 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:52,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 23 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 43 Unchecked, 0.8s Time] [2022-11-18 18:52:52,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8193 states. [2022-11-18 18:52:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8193 to 6958. [2022-11-18 18:52:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6958 states, 6953 states have (on average 4.645332949805839) internal successors, (32299), 6957 states have internal predecessors, (32299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:52,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 32299 transitions. [2022-11-18 18:52:52,187 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 32299 transitions. Word has length 14 [2022-11-18 18:52:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:52,188 INFO L495 AbstractCegarLoop]: Abstraction has 6958 states and 32299 transitions. [2022-11-18 18:52:52,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 32299 transitions. [2022-11-18 18:52:52,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:52:52,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:52,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:52,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-11-18 18:52:52,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:52,391 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:52:52,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:52,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1609870832, now seen corresponding path program 5 times [2022-11-18 18:52:52,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:52:52,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133204488] [2022-11-18 18:52:52,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:52:52,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:52,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:52:52,393 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:52:52,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-18 18:52:52,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:52:52,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:52:52,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:52:52,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:52,908 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:52:52,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:52:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:52:53,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:52:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:52:54,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:52:54,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133204488] [2022-11-18 18:52:54,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133204488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:52:54,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:52:54,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:52:54,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89686655] [2022-11-18 18:52:54,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:52:54,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:52:54,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:52:54,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:52:54,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:52:54,307 INFO L87 Difference]: Start difference. First operand 6958 states and 32299 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:55,106 INFO L93 Difference]: Finished difference Result 8616 states and 40200 transitions. [2022-11-18 18:52:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:52:55,108 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:52:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:55,140 INFO L225 Difference]: With dead ends: 8616 [2022-11-18 18:52:55,140 INFO L226 Difference]: Without dead ends: 8616 [2022-11-18 18:52:55,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:52:55,141 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:55,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 29 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 113 Unchecked, 0.7s Time] [2022-11-18 18:52:55,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8616 states. [2022-11-18 18:52:55,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8616 to 6957. [2022-11-18 18:52:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6957 states, 6952 states have (on average 4.6455696202531644) internal successors, (32296), 6956 states have internal predecessors, (32296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:55,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 32296 transitions. [2022-11-18 18:52:55,331 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 32296 transitions. Word has length 14 [2022-11-18 18:52:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:55,331 INFO L495 AbstractCegarLoop]: Abstraction has 6957 states and 32296 transitions. [2022-11-18 18:52:55,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 32296 transitions. [2022-11-18 18:52:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:52:55,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:55,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:55,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Ended with exit code 0 [2022-11-18 18:52:55,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:55,535 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:52:55,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:55,535 INFO L85 PathProgramCache]: Analyzing trace with hash 736879806, now seen corresponding path program 6 times [2022-11-18 18:52:55,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:52:55,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151052469] [2022-11-18 18:52:55,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:52:55,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:55,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:52:55,537 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:52:55,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-18 18:52:55,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:52:55,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:52:55,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:52:55,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:56,019 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:52:56,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:52:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:52:56,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:52:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:52:57,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:52:57,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151052469] [2022-11-18 18:52:57,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151052469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:52:57,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:52:57,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:52:57,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524259571] [2022-11-18 18:52:57,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:52:57,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:52:57,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:52:57,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:52:57,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:52:57,254 INFO L87 Difference]: Start difference. First operand 6957 states and 32296 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:58,013 INFO L93 Difference]: Finished difference Result 8006 states and 37359 transitions. [2022-11-18 18:52:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:52:58,015 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:52:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:58,043 INFO L225 Difference]: With dead ends: 8006 [2022-11-18 18:52:58,043 INFO L226 Difference]: Without dead ends: 8006 [2022-11-18 18:52:58,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:52:58,044 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:58,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 53 Unchecked, 0.6s Time] [2022-11-18 18:52:58,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8006 states. [2022-11-18 18:52:58,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8006 to 6956. [2022-11-18 18:52:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6956 states, 6951 states have (on average 4.648108185872537) internal successors, (32309), 6955 states have internal predecessors, (32309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6956 states to 6956 states and 32309 transitions. [2022-11-18 18:52:58,214 INFO L78 Accepts]: Start accepts. Automaton has 6956 states and 32309 transitions. Word has length 14 [2022-11-18 18:52:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:58,214 INFO L495 AbstractCegarLoop]: Abstraction has 6956 states and 32309 transitions. [2022-11-18 18:52:58,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:58,214 INFO L276 IsEmpty]: Start isEmpty. Operand 6956 states and 32309 transitions. [2022-11-18 18:52:58,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:52:58,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:58,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:58,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Ended with exit code 0 [2022-11-18 18:52:58,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:58,418 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:52:58,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:58,419 INFO L85 PathProgramCache]: Analyzing trace with hash 732872436, now seen corresponding path program 7 times [2022-11-18 18:52:58,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:52:58,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903109208] [2022-11-18 18:52:58,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:52:58,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:52:58,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:52:58,420 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:52:58,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-18 18:52:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:58,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:52:58,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:58,912 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:52:58,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:52:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:52:59,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:00,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:00,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903109208] [2022-11-18 18:53:00,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903109208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:00,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:00,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:00,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390284009] [2022-11-18 18:53:00,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:00,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:00,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:00,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:00,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:00,034 INFO L87 Difference]: Start difference. First operand 6956 states and 32309 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:00,835 INFO L93 Difference]: Finished difference Result 7851 states and 36674 transitions. [2022-11-18 18:53:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:00,837 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:00,865 INFO L225 Difference]: With dead ends: 7851 [2022-11-18 18:53:00,865 INFO L226 Difference]: Without dead ends: 7851 [2022-11-18 18:53:00,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:00,866 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:00,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 121 Unchecked, 0.7s Time] [2022-11-18 18:53:00,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2022-11-18 18:53:01,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 6956. [2022-11-18 18:53:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6956 states, 6951 states have (on average 4.648108185872537) internal successors, (32309), 6955 states have internal predecessors, (32309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6956 states to 6956 states and 32309 transitions. [2022-11-18 18:53:01,038 INFO L78 Accepts]: Start accepts. Automaton has 6956 states and 32309 transitions. Word has length 14 [2022-11-18 18:53:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:01,038 INFO L495 AbstractCegarLoop]: Abstraction has 6956 states and 32309 transitions. [2022-11-18 18:53:01,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 6956 states and 32309 transitions. [2022-11-18 18:53:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:01,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:01,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:01,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-18 18:53:01,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:01,242 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:01,242 INFO L85 PathProgramCache]: Analyzing trace with hash 732863136, now seen corresponding path program 8 times [2022-11-18 18:53:01,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:01,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660404843] [2022-11-18 18:53:01,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:53:01,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:01,244 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:01,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-18 18:53:01,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:53:01,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:01,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:01,789 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:01,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:02,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:02,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:02,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660404843] [2022-11-18 18:53:02,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660404843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:02,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:02,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:02,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11534652] [2022-11-18 18:53:02,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:02,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:02,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:02,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:02,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:02,963 INFO L87 Difference]: Start difference. First operand 6956 states and 32309 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:03,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:03,191 INFO L93 Difference]: Finished difference Result 7258 states and 33749 transitions. [2022-11-18 18:53:03,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:03,192 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:03,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:03,217 INFO L225 Difference]: With dead ends: 7258 [2022-11-18 18:53:03,217 INFO L226 Difference]: Without dead ends: 7258 [2022-11-18 18:53:03,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:03,218 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:03,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-18 18:53:03,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7258 states. [2022-11-18 18:53:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7258 to 6957. [2022-11-18 18:53:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6957 states, 6952 states have (on average 4.647871116225547) internal successors, (32312), 6956 states have internal predecessors, (32312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 32312 transitions. [2022-11-18 18:53:03,497 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 32312 transitions. Word has length 14 [2022-11-18 18:53:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:03,498 INFO L495 AbstractCegarLoop]: Abstraction has 6957 states and 32312 transitions. [2022-11-18 18:53:03,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 32312 transitions. [2022-11-18 18:53:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:03,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:03,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:03,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Ended with exit code 0 [2022-11-18 18:53:03,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:03,701 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:03,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:03,703 INFO L85 PathProgramCache]: Analyzing trace with hash 736711476, now seen corresponding path program 9 times [2022-11-18 18:53:03,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:03,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011136487] [2022-11-18 18:53:03,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:53:03,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:03,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:03,704 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:03,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-18 18:53:04,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:53:04,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:04,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:04,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:04,229 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:04,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:04,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:05,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:05,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011136487] [2022-11-18 18:53:05,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011136487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:05,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:05,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:05,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176591769] [2022-11-18 18:53:05,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:05,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:05,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:05,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:05,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:05,311 INFO L87 Difference]: Start difference. First operand 6957 states and 32312 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:06,101 INFO L93 Difference]: Finished difference Result 8263 states and 38578 transitions. [2022-11-18 18:53:06,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:06,103 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:06,133 INFO L225 Difference]: With dead ends: 8263 [2022-11-18 18:53:06,133 INFO L226 Difference]: Without dead ends: 8263 [2022-11-18 18:53:06,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:06,134 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:06,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 62 Unchecked, 0.7s Time] [2022-11-18 18:53:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2022-11-18 18:53:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7129. [2022-11-18 18:53:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7129 states, 7124 states have (on average 4.660303200449186) internal successors, (33200), 7128 states have internal predecessors, (33200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7129 states to 7129 states and 33200 transitions. [2022-11-18 18:53:06,314 INFO L78 Accepts]: Start accepts. Automaton has 7129 states and 33200 transitions. Word has length 14 [2022-11-18 18:53:06,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:06,314 INFO L495 AbstractCegarLoop]: Abstraction has 7129 states and 33200 transitions. [2022-11-18 18:53:06,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 7129 states and 33200 transitions. [2022-11-18 18:53:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:06,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:06,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:06,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2022-11-18 18:53:06,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:06,518 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:06,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:06,519 INFO L85 PathProgramCache]: Analyzing trace with hash 766818149, now seen corresponding path program 1 times [2022-11-18 18:53:06,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:06,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879476294] [2022-11-18 18:53:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:06,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:06,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:06,520 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:06,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-18 18:53:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:06,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:06,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:06,987 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:06,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:07,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:08,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:08,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879476294] [2022-11-18 18:53:08,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879476294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:08,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:08,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:08,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776579568] [2022-11-18 18:53:08,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:08,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:08,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:08,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:08,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:08,050 INFO L87 Difference]: Start difference. First operand 7129 states and 33200 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:08,637 INFO L93 Difference]: Finished difference Result 7511 states and 35084 transitions. [2022-11-18 18:53:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:53:08,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:08,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:08,667 INFO L225 Difference]: With dead ends: 7511 [2022-11-18 18:53:08,667 INFO L226 Difference]: Without dead ends: 7511 [2022-11-18 18:53:08,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:08,667 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:08,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 20 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 69 Unchecked, 0.5s Time] [2022-11-18 18:53:08,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7511 states. [2022-11-18 18:53:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7511 to 7131. [2022-11-18 18:53:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7131 states, 7126 states have (on average 4.660117878192534) internal successors, (33208), 7130 states have internal predecessors, (33208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7131 states to 7131 states and 33208 transitions. [2022-11-18 18:53:08,876 INFO L78 Accepts]: Start accepts. Automaton has 7131 states and 33208 transitions. Word has length 14 [2022-11-18 18:53:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:08,876 INFO L495 AbstractCegarLoop]: Abstraction has 7131 states and 33208 transitions. [2022-11-18 18:53:08,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 7131 states and 33208 transitions. [2022-11-18 18:53:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:08,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:08,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:08,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Ended with exit code 0 [2022-11-18 18:53:09,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:09,081 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:09,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:09,081 INFO L85 PathProgramCache]: Analyzing trace with hash 762617618, now seen corresponding path program 1 times [2022-11-18 18:53:09,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:09,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746395128] [2022-11-18 18:53:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:09,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:09,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:09,082 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:09,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-18 18:53:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:09,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:09,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:09,576 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:09,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:09,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:10,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:10,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746395128] [2022-11-18 18:53:10,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746395128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:10,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:10,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:10,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640041844] [2022-11-18 18:53:10,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:10,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:10,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:10,663 INFO L87 Difference]: Start difference. First operand 7131 states and 33208 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:10,855 INFO L93 Difference]: Finished difference Result 7510 states and 35222 transitions. [2022-11-18 18:53:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:53:10,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:10,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:10,882 INFO L225 Difference]: With dead ends: 7510 [2022-11-18 18:53:10,882 INFO L226 Difference]: Without dead ends: 7510 [2022-11-18 18:53:10,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:10,883 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:10,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-11-18 18:53:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7510 states. [2022-11-18 18:53:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7510 to 7132. [2022-11-18 18:53:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7127 states have (on average 4.660165567559983) internal successors, (33213), 7131 states have internal predecessors, (33213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 33213 transitions. [2022-11-18 18:53:11,058 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 33213 transitions. Word has length 14 [2022-11-18 18:53:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:11,059 INFO L495 AbstractCegarLoop]: Abstraction has 7132 states and 33213 transitions. [2022-11-18 18:53:11,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 33213 transitions. [2022-11-18 18:53:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:11,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:11,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:11,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Ended with exit code 0 [2022-11-18 18:53:11,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:11,262 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:11,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash 762349499, now seen corresponding path program 2 times [2022-11-18 18:53:11,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:11,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247904904] [2022-11-18 18:53:11,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:53:11,263 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:11,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:11,264 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:11,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-18 18:53:11,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:53:11,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:11,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:11,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:11,793 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:11,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:12,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:12,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:12,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247904904] [2022-11-18 18:53:12,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247904904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:12,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:12,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:12,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432883022] [2022-11-18 18:53:12,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:12,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:12,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:12,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:12,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:12,918 INFO L87 Difference]: Start difference. First operand 7132 states and 33213 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:13,469 INFO L93 Difference]: Finished difference Result 7602 states and 35544 transitions. [2022-11-18 18:53:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:13,471 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:13,498 INFO L225 Difference]: With dead ends: 7602 [2022-11-18 18:53:13,498 INFO L226 Difference]: Without dead ends: 7602 [2022-11-18 18:53:13,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:13,499 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:13,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 39 Unchecked, 0.4s Time] [2022-11-18 18:53:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2022-11-18 18:53:13,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7215. [2022-11-18 18:53:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7215 states, 7210 states have (on average 4.661581137309293) internal successors, (33610), 7214 states have internal predecessors, (33610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7215 states to 7215 states and 33610 transitions. [2022-11-18 18:53:13,670 INFO L78 Accepts]: Start accepts. Automaton has 7215 states and 33610 transitions. Word has length 14 [2022-11-18 18:53:13,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:13,671 INFO L495 AbstractCegarLoop]: Abstraction has 7215 states and 33610 transitions. [2022-11-18 18:53:13,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 7215 states and 33610 transitions. [2022-11-18 18:53:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:13,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:13,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:13,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Ended with exit code 0 [2022-11-18 18:53:13,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:13,875 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:13,875 INFO L85 PathProgramCache]: Analyzing trace with hash 762365309, now seen corresponding path program 3 times [2022-11-18 18:53:13,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:13,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548919956] [2022-11-18 18:53:13,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:53:13,875 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:13,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:13,876 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:13,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-18 18:53:14,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:53:14,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:14,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:14,385 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:14,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:14,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:15,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:15,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548919956] [2022-11-18 18:53:15,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548919956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:15,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:15,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:15,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323582218] [2022-11-18 18:53:15,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:15,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:15,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:15,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:15,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:15,506 INFO L87 Difference]: Start difference. First operand 7215 states and 33610 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:16,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:16,115 INFO L93 Difference]: Finished difference Result 7622 states and 35644 transitions. [2022-11-18 18:53:16,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:53:16,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:16,158 INFO L225 Difference]: With dead ends: 7622 [2022-11-18 18:53:16,158 INFO L226 Difference]: Without dead ends: 7622 [2022-11-18 18:53:16,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:16,159 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:16,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 23 Unchecked, 0.5s Time] [2022-11-18 18:53:16,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7622 states. [2022-11-18 18:53:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7622 to 7242. [2022-11-18 18:53:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 7237 states have (on average 4.665607295840818) internal successors, (33765), 7241 states have internal predecessors, (33765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 33765 transitions. [2022-11-18 18:53:16,331 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 33765 transitions. Word has length 14 [2022-11-18 18:53:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:16,331 INFO L495 AbstractCegarLoop]: Abstraction has 7242 states and 33765 transitions. [2022-11-18 18:53:16,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:16,332 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 33765 transitions. [2022-11-18 18:53:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:16,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:16,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:16,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Ended with exit code 0 [2022-11-18 18:53:16,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:16,539 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:16,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:16,539 INFO L85 PathProgramCache]: Analyzing trace with hash 762360938, now seen corresponding path program 2 times [2022-11-18 18:53:16,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:16,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102024129] [2022-11-18 18:53:16,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:53:16,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:16,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:16,541 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:16,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-18 18:53:16,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:53:16,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:16,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:16,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:17,097 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:17,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:17,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:18,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:18,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102024129] [2022-11-18 18:53:18,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102024129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:18,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:18,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:18,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858032242] [2022-11-18 18:53:18,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:18,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:18,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:18,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:18,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:18,254 INFO L87 Difference]: Start difference. First operand 7242 states and 33765 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:18,795 INFO L93 Difference]: Finished difference Result 7790 states and 36718 transitions. [2022-11-18 18:53:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:53:18,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:18,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:18,825 INFO L225 Difference]: With dead ends: 7790 [2022-11-18 18:53:18,825 INFO L226 Difference]: Without dead ends: 7790 [2022-11-18 18:53:18,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:18,825 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:18,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 39 Unchecked, 0.4s Time] [2022-11-18 18:53:18,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2022-11-18 18:53:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 7349. [2022-11-18 18:53:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7349 states, 7344 states have (on average 4.681236383442266) internal successors, (34379), 7348 states have internal predecessors, (34379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7349 states to 7349 states and 34379 transitions. [2022-11-18 18:53:19,005 INFO L78 Accepts]: Start accepts. Automaton has 7349 states and 34379 transitions. Word has length 14 [2022-11-18 18:53:19,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:19,005 INFO L495 AbstractCegarLoop]: Abstraction has 7349 states and 34379 transitions. [2022-11-18 18:53:19,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 7349 states and 34379 transitions. [2022-11-18 18:53:19,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:19,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:19,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:19,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Ended with exit code 0 [2022-11-18 18:53:19,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:19,209 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:19,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:19,209 INFO L85 PathProgramCache]: Analyzing trace with hash 762365526, now seen corresponding path program 10 times [2022-11-18 18:53:19,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:19,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371695310] [2022-11-18 18:53:19,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:53:19,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:19,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:19,211 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:19,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2022-11-18 18:53:19,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:53:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:19,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:19,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:19,735 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:19,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:20,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:20,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:20,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371695310] [2022-11-18 18:53:20,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371695310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:20,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:20,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:20,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417342649] [2022-11-18 18:53:20,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:20,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:20,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:20,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:20,832 INFO L87 Difference]: Start difference. First operand 7349 states and 34379 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:21,377 INFO L93 Difference]: Finished difference Result 7607 states and 35660 transitions. [2022-11-18 18:53:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:21,379 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:21,407 INFO L225 Difference]: With dead ends: 7607 [2022-11-18 18:53:21,407 INFO L226 Difference]: Without dead ends: 7607 [2022-11-18 18:53:21,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:21,407 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:21,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 26 Unchecked, 0.4s Time] [2022-11-18 18:53:21,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2022-11-18 18:53:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 7349. [2022-11-18 18:53:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7349 states, 7344 states have (on average 4.681236383442266) internal successors, (34379), 7348 states have internal predecessors, (34379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:21,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7349 states to 7349 states and 34379 transitions. [2022-11-18 18:53:21,652 INFO L78 Accepts]: Start accepts. Automaton has 7349 states and 34379 transitions. Word has length 14 [2022-11-18 18:53:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:21,652 INFO L495 AbstractCegarLoop]: Abstraction has 7349 states and 34379 transitions. [2022-11-18 18:53:21,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand 7349 states and 34379 transitions. [2022-11-18 18:53:21,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:21,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:21,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:21,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Ended with exit code 0 [2022-11-18 18:53:21,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:21,856 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:21,857 INFO L85 PathProgramCache]: Analyzing trace with hash 762213998, now seen corresponding path program 3 times [2022-11-18 18:53:21,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:21,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062344420] [2022-11-18 18:53:21,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:53:21,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:21,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:21,859 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:21,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2022-11-18 18:53:22,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:53:22,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:22,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:22,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:22,377 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:22,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:22,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:23,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:23,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062344420] [2022-11-18 18:53:23,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062344420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:23,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:23,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:23,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540472594] [2022-11-18 18:53:23,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:23,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:23,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:23,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:23,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:23,475 INFO L87 Difference]: Start difference. First operand 7349 states and 34379 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:24,027 INFO L93 Difference]: Finished difference Result 7773 states and 36638 transitions. [2022-11-18 18:53:24,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:24,029 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:24,057 INFO L225 Difference]: With dead ends: 7773 [2022-11-18 18:53:24,057 INFO L226 Difference]: Without dead ends: 7773 [2022-11-18 18:53:24,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:24,058 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:24,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 25 Unchecked, 0.4s Time] [2022-11-18 18:53:24,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2022-11-18 18:53:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 7427. [2022-11-18 18:53:24,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7427 states, 7422 states have (on average 4.692670439234708) internal successors, (34829), 7426 states have internal predecessors, (34829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:24,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7427 states to 7427 states and 34829 transitions. [2022-11-18 18:53:24,232 INFO L78 Accepts]: Start accepts. Automaton has 7427 states and 34829 transitions. Word has length 14 [2022-11-18 18:53:24,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:24,232 INFO L495 AbstractCegarLoop]: Abstraction has 7427 states and 34829 transitions. [2022-11-18 18:53:24,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:24,232 INFO L276 IsEmpty]: Start isEmpty. Operand 7427 states and 34829 transitions. [2022-11-18 18:53:24,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:24,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:24,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:24,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Ended with exit code 0 [2022-11-18 18:53:24,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:24,435 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash 762356226, now seen corresponding path program 11 times [2022-11-18 18:53:24,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:24,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745162888] [2022-11-18 18:53:24,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:53:24,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:24,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:24,437 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:24,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-18 18:53:24,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:53:24,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:24,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:53:24,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:24,976 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:24,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:25,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:26,328 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:26,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745162888] [2022-11-18 18:53:26,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745162888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:26,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:26,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:53:26,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024396932] [2022-11-18 18:53:26,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:26,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:53:26,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:26,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:53:26,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:53:26,329 INFO L87 Difference]: Start difference. First operand 7427 states and 34829 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:26,973 INFO L93 Difference]: Finished difference Result 7697 states and 36151 transitions. [2022-11-18 18:53:26,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:26,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:26,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:27,002 INFO L225 Difference]: With dead ends: 7697 [2022-11-18 18:53:27,002 INFO L226 Difference]: Without dead ends: 7697 [2022-11-18 18:53:27,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:53:27,004 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:27,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 39 Unchecked, 0.5s Time] [2022-11-18 18:53:27,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7697 states. [2022-11-18 18:53:27,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7697 to 7427. [2022-11-18 18:53:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7427 states, 7422 states have (on average 4.692670439234708) internal successors, (34829), 7426 states have internal predecessors, (34829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7427 states to 7427 states and 34829 transitions. [2022-11-18 18:53:27,205 INFO L78 Accepts]: Start accepts. Automaton has 7427 states and 34829 transitions. Word has length 14 [2022-11-18 18:53:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:27,206 INFO L495 AbstractCegarLoop]: Abstraction has 7427 states and 34829 transitions. [2022-11-18 18:53:27,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 7427 states and 34829 transitions. [2022-11-18 18:53:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:27,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:27,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:27,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Ended with exit code 0 [2022-11-18 18:53:27,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:27,410 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:27,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:27,410 INFO L85 PathProgramCache]: Analyzing trace with hash -121400078, now seen corresponding path program 12 times [2022-11-18 18:53:27,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:27,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668291736] [2022-11-18 18:53:27,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:53:27,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:27,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:27,412 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:27,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-18 18:53:27,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:53:27,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:27,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:27,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:27,925 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:27,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:28,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:29,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:29,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668291736] [2022-11-18 18:53:29,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668291736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:29,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:29,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:29,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883629709] [2022-11-18 18:53:29,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:29,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:29,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:29,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:29,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:29,015 INFO L87 Difference]: Start difference. First operand 7427 states and 34829 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:29,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:29,692 INFO L93 Difference]: Finished difference Result 9257 states and 43863 transitions. [2022-11-18 18:53:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:29,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:29,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:29,726 INFO L225 Difference]: With dead ends: 9257 [2022-11-18 18:53:29,726 INFO L226 Difference]: Without dead ends: 9257 [2022-11-18 18:53:29,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:29,727 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:29,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 64 Unchecked, 0.5s Time] [2022-11-18 18:53:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9257 states. [2022-11-18 18:53:29,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9257 to 8055. [2022-11-18 18:53:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8055 states, 8050 states have (on average 4.736521739130435) internal successors, (38129), 8054 states have internal predecessors, (38129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8055 states to 8055 states and 38129 transitions. [2022-11-18 18:53:29,924 INFO L78 Accepts]: Start accepts. Automaton has 8055 states and 38129 transitions. Word has length 14 [2022-11-18 18:53:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:29,924 INFO L495 AbstractCegarLoop]: Abstraction has 8055 states and 38129 transitions. [2022-11-18 18:53:29,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 8055 states and 38129 transitions. [2022-11-18 18:53:29,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:29,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:29,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:29,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Ended with exit code 0 [2022-11-18 18:53:30,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:30,129 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:30,129 INFO L85 PathProgramCache]: Analyzing trace with hash -121568408, now seen corresponding path program 13 times [2022-11-18 18:53:30,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:30,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743970900] [2022-11-18 18:53:30,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:53:30,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:30,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:30,131 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:30,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2022-11-18 18:53:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:30,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:30,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:30,653 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:30,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:31,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:31,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:31,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743970900] [2022-11-18 18:53:31,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743970900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:31,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:31,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:31,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330826091] [2022-11-18 18:53:31,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:31,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:31,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:31,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:31,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:31,726 INFO L87 Difference]: Start difference. First operand 8055 states and 38129 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:32,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:32,601 INFO L93 Difference]: Finished difference Result 9339 states and 44357 transitions. [2022-11-18 18:53:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:32,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:32,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:32,637 INFO L225 Difference]: With dead ends: 9339 [2022-11-18 18:53:32,637 INFO L226 Difference]: Without dead ends: 9339 [2022-11-18 18:53:32,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:53:32,638 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:32,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 27 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 95 Unchecked, 0.6s Time] [2022-11-18 18:53:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9339 states. [2022-11-18 18:53:32,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9339 to 8037. [2022-11-18 18:53:32,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8037 states, 8032 states have (on average 4.739292828685259) internal successors, (38066), 8036 states have internal predecessors, (38066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8037 states to 8037 states and 38066 transitions. [2022-11-18 18:53:32,828 INFO L78 Accepts]: Start accepts. Automaton has 8037 states and 38066 transitions. Word has length 14 [2022-11-18 18:53:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:32,828 INFO L495 AbstractCegarLoop]: Abstraction has 8037 states and 38066 transitions. [2022-11-18 18:53:32,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 8037 states and 38066 transitions. [2022-11-18 18:53:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:32,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:32,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:32,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Forceful destruction successful, exit code 0 [2022-11-18 18:53:33,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:33,032 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:33,033 INFO L85 PathProgramCache]: Analyzing trace with hash -533401621, now seen corresponding path program 4 times [2022-11-18 18:53:33,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:33,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104764947] [2022-11-18 18:53:33,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:53:33,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:33,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:33,035 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:33,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-18 18:53:33,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:53:33,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:33,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:33,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:33,682 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:33,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:34,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:34,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:34,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104764947] [2022-11-18 18:53:34,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104764947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:34,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:34,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:34,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341926532] [2022-11-18 18:53:34,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:34,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:34,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:34,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:34,795 INFO L87 Difference]: Start difference. First operand 8037 states and 38066 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:35,397 INFO L93 Difference]: Finished difference Result 8510 states and 40323 transitions. [2022-11-18 18:53:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:53:35,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:35,429 INFO L225 Difference]: With dead ends: 8510 [2022-11-18 18:53:35,429 INFO L226 Difference]: Without dead ends: 8510 [2022-11-18 18:53:35,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:35,429 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:35,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 28 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 74 Unchecked, 0.5s Time] [2022-11-18 18:53:35,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8510 states. [2022-11-18 18:53:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8510 to 8037. [2022-11-18 18:53:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8037 states, 8032 states have (on average 4.739168326693227) internal successors, (38065), 8036 states have internal predecessors, (38065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8037 states to 8037 states and 38065 transitions. [2022-11-18 18:53:35,623 INFO L78 Accepts]: Start accepts. Automaton has 8037 states and 38065 transitions. Word has length 14 [2022-11-18 18:53:35,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:35,623 INFO L495 AbstractCegarLoop]: Abstraction has 8037 states and 38065 transitions. [2022-11-18 18:53:35,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:35,624 INFO L276 IsEmpty]: Start isEmpty. Operand 8037 states and 38065 transitions. [2022-11-18 18:53:35,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:35,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:35,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:35,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Ended with exit code 0 [2022-11-18 18:53:35,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:35,831 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:35,831 INFO L85 PathProgramCache]: Analyzing trace with hash -537602152, now seen corresponding path program 4 times [2022-11-18 18:53:35,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:35,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75063140] [2022-11-18 18:53:35,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:53:35,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:35,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:35,834 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:35,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2022-11-18 18:53:36,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:53:36,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:36,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:36,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:36,349 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:36,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:36,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:37,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:37,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75063140] [2022-11-18 18:53:37,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75063140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:37,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:37,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:37,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120502346] [2022-11-18 18:53:37,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:37,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:37,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:37,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:37,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:37,479 INFO L87 Difference]: Start difference. First operand 8037 states and 38065 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:38,215 INFO L93 Difference]: Finished difference Result 8527 states and 40404 transitions. [2022-11-18 18:53:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:53:38,217 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:38,246 INFO L225 Difference]: With dead ends: 8527 [2022-11-18 18:53:38,246 INFO L226 Difference]: Without dead ends: 8527 [2022-11-18 18:53:38,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:38,247 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:38,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 28 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 74 Unchecked, 0.6s Time] [2022-11-18 18:53:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2022-11-18 18:53:38,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 8038. [2022-11-18 18:53:38,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8038 states, 8033 states have (on average 4.739200796713557) internal successors, (38070), 8037 states have internal predecessors, (38070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:38,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8038 states to 8038 states and 38070 transitions. [2022-11-18 18:53:38,440 INFO L78 Accepts]: Start accepts. Automaton has 8038 states and 38070 transitions. Word has length 14 [2022-11-18 18:53:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:38,440 INFO L495 AbstractCegarLoop]: Abstraction has 8038 states and 38070 transitions. [2022-11-18 18:53:38,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 8038 states and 38070 transitions. [2022-11-18 18:53:38,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:38,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:38,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:38,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Ended with exit code 0 [2022-11-18 18:53:38,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:38,646 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:38,646 INFO L85 PathProgramCache]: Analyzing trace with hash -532645314, now seen corresponding path program 14 times [2022-11-18 18:53:38,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:38,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145882771] [2022-11-18 18:53:38,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:53:38,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:38,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:38,648 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:38,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2022-11-18 18:53:38,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:53:38,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:38,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:38,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:39,144 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:39,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:53:39,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:53:40,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:40,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145882771] [2022-11-18 18:53:40,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145882771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:40,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:40,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:40,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832400529] [2022-11-18 18:53:40,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:40,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:40,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:40,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:40,348 INFO L87 Difference]: Start difference. First operand 8038 states and 38070 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:40,670 INFO L93 Difference]: Finished difference Result 9150 states and 43423 transitions. [2022-11-18 18:53:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:40,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:40,705 INFO L225 Difference]: With dead ends: 9150 [2022-11-18 18:53:40,705 INFO L226 Difference]: Without dead ends: 9150 [2022-11-18 18:53:40,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:40,705 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:40,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-11-18 18:53:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9150 states. [2022-11-18 18:53:40,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9150 to 8683. [2022-11-18 18:53:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8683 states, 8678 states have (on average 4.765383728969809) internal successors, (41354), 8682 states have internal predecessors, (41354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8683 states to 8683 states and 41354 transitions. [2022-11-18 18:53:40,955 INFO L78 Accepts]: Start accepts. Automaton has 8683 states and 41354 transitions. Word has length 14 [2022-11-18 18:53:40,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:40,955 INFO L495 AbstractCegarLoop]: Abstraction has 8683 states and 41354 transitions. [2022-11-18 18:53:40,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:40,955 INFO L276 IsEmpty]: Start isEmpty. Operand 8683 states and 41354 transitions. [2022-11-18 18:53:40,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:40,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:40,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:40,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Ended with exit code 0 [2022-11-18 18:53:41,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:41,159 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:41,160 INFO L85 PathProgramCache]: Analyzing trace with hash -396356604, now seen corresponding path program 15 times [2022-11-18 18:53:41,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:41,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956509711] [2022-11-18 18:53:41,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:53:41,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:41,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:41,161 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:41,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2022-11-18 18:53:41,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:53:41,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:41,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:41,672 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:41,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:42,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:42,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:42,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956509711] [2022-11-18 18:53:42,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956509711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:42,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:42,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:42,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189550033] [2022-11-18 18:53:42,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:42,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:42,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:42,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:42,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:42,809 INFO L87 Difference]: Start difference. First operand 8683 states and 41354 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:43,837 INFO L93 Difference]: Finished difference Result 9534 states and 45411 transitions. [2022-11-18 18:53:43,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:43,840 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:43,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:43,874 INFO L225 Difference]: With dead ends: 9534 [2022-11-18 18:53:43,874 INFO L226 Difference]: Without dead ends: 9534 [2022-11-18 18:53:43,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:43,874 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:43,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 132 Unchecked, 0.9s Time] [2022-11-18 18:53:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9534 states. [2022-11-18 18:53:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9534 to 8680. [2022-11-18 18:53:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8680 states, 8675 states have (on average 4.76564841498559) internal successors, (41342), 8679 states have internal predecessors, (41342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8680 states to 8680 states and 41342 transitions. [2022-11-18 18:53:44,095 INFO L78 Accepts]: Start accepts. Automaton has 8680 states and 41342 transitions. Word has length 14 [2022-11-18 18:53:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:44,096 INFO L495 AbstractCegarLoop]: Abstraction has 8680 states and 41342 transitions. [2022-11-18 18:53:44,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 8680 states and 41342 transitions. [2022-11-18 18:53:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:44,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:44,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:44,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Ended with exit code 0 [2022-11-18 18:53:44,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:44,300 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:44,300 INFO L85 PathProgramCache]: Analyzing trace with hash 519403949, now seen corresponding path program 5 times [2022-11-18 18:53:44,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:44,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970507762] [2022-11-18 18:53:44,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:53:44,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:44,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:44,302 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:44,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-18 18:53:44,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:53:44,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:44,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:53:44,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:44,794 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:44,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:45,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:46,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:46,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970507762] [2022-11-18 18:53:46,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970507762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:46,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:46,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:53:46,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424194873] [2022-11-18 18:53:46,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:46,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:53:46,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:46,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:53:46,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:53:46,121 INFO L87 Difference]: Start difference. First operand 8680 states and 41342 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:46,848 INFO L93 Difference]: Finished difference Result 8991 states and 42781 transitions. [2022-11-18 18:53:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:53:46,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:46,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:46,886 INFO L225 Difference]: With dead ends: 8991 [2022-11-18 18:53:46,886 INFO L226 Difference]: Without dead ends: 8991 [2022-11-18 18:53:46,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:53:46,886 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:46,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 95 Unchecked, 0.6s Time] [2022-11-18 18:53:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8991 states. [2022-11-18 18:53:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8991 to 8683. [2022-11-18 18:53:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8683 states, 8678 states have (on average 4.765383728969809) internal successors, (41354), 8682 states have internal predecessors, (41354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8683 states to 8683 states and 41354 transitions. [2022-11-18 18:53:47,099 INFO L78 Accepts]: Start accepts. Automaton has 8683 states and 41354 transitions. Word has length 14 [2022-11-18 18:53:47,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:47,100 INFO L495 AbstractCegarLoop]: Abstraction has 8683 states and 41354 transitions. [2022-11-18 18:53:47,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:47,100 INFO L276 IsEmpty]: Start isEmpty. Operand 8683 states and 41354 transitions. [2022-11-18 18:53:47,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:47,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:47,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:47,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Forceful destruction successful, exit code 0 [2022-11-18 18:53:47,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:47,304 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:47,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:47,304 INFO L85 PathProgramCache]: Analyzing trace with hash 519412319, now seen corresponding path program 6 times [2022-11-18 18:53:47,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:47,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296351334] [2022-11-18 18:53:47,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:53:47,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:47,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:47,305 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:47,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2022-11-18 18:53:47,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:53:47,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:47,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:47,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:47,892 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:47,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:48,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:49,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:49,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296351334] [2022-11-18 18:53:49,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296351334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:49,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:49,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:49,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488540740] [2022-11-18 18:53:49,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:49,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:49,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:49,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:49,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:49,033 INFO L87 Difference]: Start difference. First operand 8683 states and 41354 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:49,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:49,837 INFO L93 Difference]: Finished difference Result 9317 states and 44278 transitions. [2022-11-18 18:53:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:49,839 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:49,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:49,870 INFO L225 Difference]: With dead ends: 9317 [2022-11-18 18:53:49,870 INFO L226 Difference]: Without dead ends: 9317 [2022-11-18 18:53:49,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:49,870 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:49,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 22 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 77 Unchecked, 0.7s Time] [2022-11-18 18:53:49,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9317 states. [2022-11-18 18:53:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9317 to 8761. [2022-11-18 18:53:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8761 states, 8756 states have (on average 4.762905436272271) internal successors, (41704), 8760 states have internal predecessors, (41704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8761 states to 8761 states and 41704 transitions. [2022-11-18 18:53:50,066 INFO L78 Accepts]: Start accepts. Automaton has 8761 states and 41704 transitions. Word has length 14 [2022-11-18 18:53:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:50,066 INFO L495 AbstractCegarLoop]: Abstraction has 8761 states and 41704 transitions. [2022-11-18 18:53:50,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 8761 states and 41704 transitions. [2022-11-18 18:53:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:50,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:50,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:50,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Forceful destruction successful, exit code 0 [2022-11-18 18:53:50,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:50,283 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:50,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:50,283 INFO L85 PathProgramCache]: Analyzing trace with hash 389195858, now seen corresponding path program 5 times [2022-11-18 18:53:50,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:50,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049452148] [2022-11-18 18:53:50,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:53:50,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:50,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:50,285 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:50,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-18 18:53:50,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:53:50,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:50,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:53:50,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:50,847 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:50,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:51,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:52,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:52,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049452148] [2022-11-18 18:53:52,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049452148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:52,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:52,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:53:52,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631293033] [2022-11-18 18:53:52,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:52,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:53:52,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:52,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:53:52,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:53:52,164 INFO L87 Difference]: Start difference. First operand 8761 states and 41704 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:52,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:52,782 INFO L93 Difference]: Finished difference Result 9112 states and 43616 transitions. [2022-11-18 18:53:52,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:52,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:52,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:52,816 INFO L225 Difference]: With dead ends: 9112 [2022-11-18 18:53:52,816 INFO L226 Difference]: Without dead ends: 9112 [2022-11-18 18:53:52,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:53:52,817 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:52,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-11-18 18:53:52,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9112 states. [2022-11-18 18:53:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9112 to 8761. [2022-11-18 18:53:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8761 states, 8756 states have (on average 4.762905436272271) internal successors, (41704), 8760 states have internal predecessors, (41704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8761 states to 8761 states and 41704 transitions. [2022-11-18 18:53:53,030 INFO L78 Accepts]: Start accepts. Automaton has 8761 states and 41704 transitions. Word has length 14 [2022-11-18 18:53:53,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:53,030 INFO L495 AbstractCegarLoop]: Abstraction has 8761 states and 41704 transitions. [2022-11-18 18:53:53,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:53,031 INFO L276 IsEmpty]: Start isEmpty. Operand 8761 states and 41704 transitions. [2022-11-18 18:53:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:53,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:53,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:53,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Ended with exit code 0 [2022-11-18 18:53:53,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:53,235 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:53,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:53,235 INFO L85 PathProgramCache]: Analyzing trace with hash 380875799, now seen corresponding path program 7 times [2022-11-18 18:53:53,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:53,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226837638] [2022-11-18 18:53:53,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:53:53,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:53,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:53,236 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:53,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-18 18:53:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:53,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:53,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:53,745 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:53,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:54,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:54,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:54,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226837638] [2022-11-18 18:53:54,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226837638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:54,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:54,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:54,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687836262] [2022-11-18 18:53:54,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:54,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:54,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:54,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:54,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:54,832 INFO L87 Difference]: Start difference. First operand 8761 states and 41704 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:55,536 INFO L93 Difference]: Finished difference Result 8980 states and 42745 transitions. [2022-11-18 18:53:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:55,538 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:55,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:55,572 INFO L225 Difference]: With dead ends: 8980 [2022-11-18 18:53:55,573 INFO L226 Difference]: Without dead ends: 8980 [2022-11-18 18:53:55,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:55,573 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:55,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 50 Unchecked, 0.6s Time] [2022-11-18 18:53:55,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8980 states. [2022-11-18 18:53:55,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8980 to 8759. [2022-11-18 18:53:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8759 states, 8754 states have (on average 4.763079734978295) internal successors, (41696), 8758 states have internal predecessors, (41696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8759 states to 8759 states and 41696 transitions. [2022-11-18 18:53:55,783 INFO L78 Accepts]: Start accepts. Automaton has 8759 states and 41696 transitions. Word has length 14 [2022-11-18 18:53:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:55,784 INFO L495 AbstractCegarLoop]: Abstraction has 8759 states and 41696 transitions. [2022-11-18 18:53:55,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 8759 states and 41696 transitions. [2022-11-18 18:53:55,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:55,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:55,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:55,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Ended with exit code 0 [2022-11-18 18:53:56,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:56,003 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:56,003 INFO L85 PathProgramCache]: Analyzing trace with hash 380884169, now seen corresponding path program 8 times [2022-11-18 18:53:56,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:56,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536366890] [2022-11-18 18:53:56,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:53:56,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:56,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:56,005 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:56,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-11-18 18:53:56,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:53:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:56,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:56,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:56,511 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:56,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:56,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:57,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:53:57,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536366890] [2022-11-18 18:53:57,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536366890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:57,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:53:57,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:53:57,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415586053] [2022-11-18 18:53:57,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:57,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:57,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:53:57,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:57,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:57,636 INFO L87 Difference]: Start difference. First operand 8759 states and 41696 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:58,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:58,505 INFO L93 Difference]: Finished difference Result 9240 states and 43949 transitions. [2022-11-18 18:53:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:53:58,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:53:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:58,538 INFO L225 Difference]: With dead ends: 9240 [2022-11-18 18:53:58,538 INFO L226 Difference]: Without dead ends: 9240 [2022-11-18 18:53:58,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:58,538 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 40 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:58,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 22 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 77 Unchecked, 0.7s Time] [2022-11-18 18:53:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9240 states. [2022-11-18 18:53:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9240 to 8769. [2022-11-18 18:53:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8769 states, 8764 states have (on average 4.7624372432679145) internal successors, (41738), 8768 states have internal predecessors, (41738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:58,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8769 states to 8769 states and 41738 transitions. [2022-11-18 18:53:58,746 INFO L78 Accepts]: Start accepts. Automaton has 8769 states and 41738 transitions. Word has length 14 [2022-11-18 18:53:58,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:58,746 INFO L495 AbstractCegarLoop]: Abstraction has 8769 states and 41738 transitions. [2022-11-18 18:53:58,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:58,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8769 states and 41738 transitions. [2022-11-18 18:53:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:53:58,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:58,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:58,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Ended with exit code 0 [2022-11-18 18:53:58,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:58,950 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:53:58,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:58,950 INFO L85 PathProgramCache]: Analyzing trace with hash 376675268, now seen corresponding path program 6 times [2022-11-18 18:53:58,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:53:58,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466195803] [2022-11-18 18:53:58,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:53:58,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:53:58,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:53:58,951 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:53:58,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-18 18:53:59,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:53:59,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:59,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:53:59,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:59,502 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:53:59,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:53:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:53:59,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:00,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:00,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466195803] [2022-11-18 18:54:00,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466195803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:00,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:00,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:00,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823351821] [2022-11-18 18:54:00,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:00,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:00,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:00,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:00,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:00,625 INFO L87 Difference]: Start difference. First operand 8769 states and 41738 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:01,278 INFO L93 Difference]: Finished difference Result 9118 states and 43566 transitions. [2022-11-18 18:54:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:01,280 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:01,313 INFO L225 Difference]: With dead ends: 9118 [2022-11-18 18:54:01,313 INFO L226 Difference]: Without dead ends: 9118 [2022-11-18 18:54:01,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:01,314 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:01,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 27 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-11-18 18:54:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9118 states. [2022-11-18 18:54:01,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9118 to 8894. [2022-11-18 18:54:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8894 states, 8889 states have (on average 4.777027787152661) internal successors, (42463), 8893 states have internal predecessors, (42463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8894 states to 8894 states and 42463 transitions. [2022-11-18 18:54:01,522 INFO L78 Accepts]: Start accepts. Automaton has 8894 states and 42463 transitions. Word has length 14 [2022-11-18 18:54:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:01,523 INFO L495 AbstractCegarLoop]: Abstraction has 8894 states and 42463 transitions. [2022-11-18 18:54:01,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 8894 states and 42463 transitions. [2022-11-18 18:54:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:01,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:01,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:01,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Ended with exit code 0 [2022-11-18 18:54:01,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:01,727 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:01,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:01,727 INFO L85 PathProgramCache]: Analyzing trace with hash 376683638, now seen corresponding path program 7 times [2022-11-18 18:54:01,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:01,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402163717] [2022-11-18 18:54:01,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:54:01,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:01,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:01,728 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:01,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2022-11-18 18:54:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:54:02,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:02,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:02,244 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:02,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:02,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:03,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:03,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402163717] [2022-11-18 18:54:03,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402163717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:03,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:03,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:03,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085554801] [2022-11-18 18:54:03,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:03,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:03,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:03,287 INFO L87 Difference]: Start difference. First operand 8894 states and 42463 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:03,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:03,858 INFO L93 Difference]: Finished difference Result 9311 states and 44622 transitions. [2022-11-18 18:54:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:54:03,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:03,892 INFO L225 Difference]: With dead ends: 9311 [2022-11-18 18:54:03,892 INFO L226 Difference]: Without dead ends: 9311 [2022-11-18 18:54:03,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:03,893 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:03,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2022-11-18 18:54:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9311 states. [2022-11-18 18:54:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9311 to 8905. [2022-11-18 18:54:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8905 states, 8900 states have (on average 4.77629213483146) internal successors, (42509), 8904 states have internal predecessors, (42509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:04,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8905 states to 8905 states and 42509 transitions. [2022-11-18 18:54:04,084 INFO L78 Accepts]: Start accepts. Automaton has 8905 states and 42509 transitions. Word has length 14 [2022-11-18 18:54:04,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:04,084 INFO L495 AbstractCegarLoop]: Abstraction has 8905 states and 42509 transitions. [2022-11-18 18:54:04,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand 8905 states and 42509 transitions. [2022-11-18 18:54:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:04,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:04,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:04,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Ended with exit code 0 [2022-11-18 18:54:04,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:04,288 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:04,288 INFO L85 PathProgramCache]: Analyzing trace with hash 381649559, now seen corresponding path program 9 times [2022-11-18 18:54:04,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:04,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995580609] [2022-11-18 18:54:04,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:54:04,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:04,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:04,289 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:04,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2022-11-18 18:54:04,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:54:04,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:04,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:04,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:04,847 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:04,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:05,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:05,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:05,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995580609] [2022-11-18 18:54:05,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995580609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:05,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:05,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:05,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978671819] [2022-11-18 18:54:05,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:05,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:05,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:05,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:05,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:05,965 INFO L87 Difference]: Start difference. First operand 8905 states and 42509 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:06,489 INFO L93 Difference]: Finished difference Result 9315 states and 44581 transitions. [2022-11-18 18:54:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:06,491 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:06,525 INFO L225 Difference]: With dead ends: 9315 [2022-11-18 18:54:06,525 INFO L226 Difference]: Without dead ends: 9315 [2022-11-18 18:54:06,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:06,525 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:06,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-18 18:54:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9315 states. [2022-11-18 18:54:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9315 to 8952. [2022-11-18 18:54:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8952 states, 8947 states have (on average 4.781491002570694) internal successors, (42780), 8951 states have internal predecessors, (42780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8952 states to 8952 states and 42780 transitions. [2022-11-18 18:54:06,734 INFO L78 Accepts]: Start accepts. Automaton has 8952 states and 42780 transitions. Word has length 14 [2022-11-18 18:54:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:06,735 INFO L495 AbstractCegarLoop]: Abstraction has 8952 states and 42780 transitions. [2022-11-18 18:54:06,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 8952 states and 42780 transitions. [2022-11-18 18:54:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:06,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:06,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:06,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Forceful destruction successful, exit code 0 [2022-11-18 18:54:06,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:06,954 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:06,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:06,955 INFO L85 PathProgramCache]: Analyzing trace with hash 381645188, now seen corresponding path program 8 times [2022-11-18 18:54:06,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:06,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052480115] [2022-11-18 18:54:06,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:54:06,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:06,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:06,957 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:06,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2022-11-18 18:54:07,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:54:07,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:07,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:07,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:07,526 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:07,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:07,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:08,707 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:08,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052480115] [2022-11-18 18:54:08,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052480115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:08,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:08,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:08,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717985101] [2022-11-18 18:54:08,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:08,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:08,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:08,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:08,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:08,709 INFO L87 Difference]: Start difference. First operand 8952 states and 42780 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:09,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:09,575 INFO L93 Difference]: Finished difference Result 9601 states and 46157 transitions. [2022-11-18 18:54:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:09,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:09,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:09,611 INFO L225 Difference]: With dead ends: 9601 [2022-11-18 18:54:09,611 INFO L226 Difference]: Without dead ends: 9601 [2022-11-18 18:54:09,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:09,611 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:09,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 25 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 139 Unchecked, 0.7s Time] [2022-11-18 18:54:09,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9601 states. [2022-11-18 18:54:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9601 to 9111. [2022-11-18 18:54:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 9106 states have (on average 4.798704151109159) internal successors, (43697), 9110 states have internal predecessors, (43697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 43697 transitions. [2022-11-18 18:54:09,826 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 43697 transitions. Word has length 14 [2022-11-18 18:54:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:09,827 INFO L495 AbstractCegarLoop]: Abstraction has 9111 states and 43697 transitions. [2022-11-18 18:54:09,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 43697 transitions. [2022-11-18 18:54:09,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:09,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:09,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:09,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Ended with exit code 0 [2022-11-18 18:54:10,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:10,031 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:10,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:10,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1781867061, now seen corresponding path program 1 times [2022-11-18 18:54:10,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:10,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616926468] [2022-11-18 18:54:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:54:10,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:10,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:10,032 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:10,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2022-11-18 18:54:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:54:10,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:10,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:10,508 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:10,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:10,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:11,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:11,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616926468] [2022-11-18 18:54:11,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616926468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:11,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:11,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:11,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805123436] [2022-11-18 18:54:11,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:11,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:11,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:11,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:11,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:11,474 INFO L87 Difference]: Start difference. First operand 9111 states and 43697 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:12,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:12,066 INFO L93 Difference]: Finished difference Result 9293 states and 44469 transitions. [2022-11-18 18:54:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:12,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:12,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:12,101 INFO L225 Difference]: With dead ends: 9293 [2022-11-18 18:54:12,101 INFO L226 Difference]: Without dead ends: 9293 [2022-11-18 18:54:12,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:12,101 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:12,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-11-18 18:54:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9293 states. [2022-11-18 18:54:12,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9293 to 9111. [2022-11-18 18:54:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 9106 states have (on average 4.798704151109159) internal successors, (43697), 9110 states have internal predecessors, (43697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:12,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 43697 transitions. [2022-11-18 18:54:12,325 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 43697 transitions. Word has length 14 [2022-11-18 18:54:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:12,325 INFO L495 AbstractCegarLoop]: Abstraction has 9111 states and 43697 transitions. [2022-11-18 18:54:12,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 43697 transitions. [2022-11-18 18:54:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:12,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:12,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:12,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Ended with exit code 0 [2022-11-18 18:54:12,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:12,529 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:12,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:12,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1781873571, now seen corresponding path program 2 times [2022-11-18 18:54:12,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:12,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049916075] [2022-11-18 18:54:12,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:54:12,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:12,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:12,531 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:12,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-11-18 18:54:12,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:54:12,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:12,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:12,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:13,044 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:13,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:13,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:14,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:14,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049916075] [2022-11-18 18:54:14,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049916075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:14,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:14,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:14,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553040816] [2022-11-18 18:54:14,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:14,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:14,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:14,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:14,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:14,164 INFO L87 Difference]: Start difference. First operand 9111 states and 43697 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:14,838 INFO L93 Difference]: Finished difference Result 9427 states and 45031 transitions. [2022-11-18 18:54:14,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:14,839 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:14,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:14,868 INFO L225 Difference]: With dead ends: 9427 [2022-11-18 18:54:14,868 INFO L226 Difference]: Without dead ends: 9427 [2022-11-18 18:54:14,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:14,869 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:14,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 22 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 51 Unchecked, 0.5s Time] [2022-11-18 18:54:14,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9427 states. [2022-11-18 18:54:15,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9427 to 9187. [2022-11-18 18:54:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9187 states, 9182 states have (on average 4.799063384883468) internal successors, (44065), 9186 states have internal predecessors, (44065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9187 states to 9187 states and 44065 transitions. [2022-11-18 18:54:15,095 INFO L78 Accepts]: Start accepts. Automaton has 9187 states and 44065 transitions. Word has length 14 [2022-11-18 18:54:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:15,095 INFO L495 AbstractCegarLoop]: Abstraction has 9187 states and 44065 transitions. [2022-11-18 18:54:15,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 9187 states and 44065 transitions. [2022-11-18 18:54:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:15,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:15,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:15,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Ended with exit code 0 [2022-11-18 18:54:15,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:15,300 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:15,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1787034141, now seen corresponding path program 3 times [2022-11-18 18:54:15,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:15,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323544621] [2022-11-18 18:54:15,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:54:15,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:15,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:15,301 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:15,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2022-11-18 18:54:15,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:54:15,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:15,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:15,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:15,860 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:15,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:16,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:16,876 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:16,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323544621] [2022-11-18 18:54:16,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323544621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:16,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:16,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:16,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022030849] [2022-11-18 18:54:16,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:16,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:16,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:16,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:16,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:16,877 INFO L87 Difference]: Start difference. First operand 9187 states and 44065 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:17,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:17,080 INFO L93 Difference]: Finished difference Result 9393 states and 45039 transitions. [2022-11-18 18:54:17,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:54:17,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:17,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:17,115 INFO L225 Difference]: With dead ends: 9393 [2022-11-18 18:54:17,115 INFO L226 Difference]: Without dead ends: 9393 [2022-11-18 18:54:17,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:17,115 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:17,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-18 18:54:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9393 states. [2022-11-18 18:54:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9393 to 9211. [2022-11-18 18:54:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9211 states, 9206 states have (on average 4.7991527264827285) internal successors, (44181), 9210 states have internal predecessors, (44181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:17,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9211 states to 9211 states and 44181 transitions. [2022-11-18 18:54:17,335 INFO L78 Accepts]: Start accepts. Automaton has 9211 states and 44181 transitions. Word has length 14 [2022-11-18 18:54:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:17,336 INFO L495 AbstractCegarLoop]: Abstraction has 9211 states and 44181 transitions. [2022-11-18 18:54:17,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 9211 states and 44181 transitions. [2022-11-18 18:54:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:17,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:17,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:17,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Ended with exit code 0 [2022-11-18 18:54:17,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:17,540 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:17,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:17,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1769354841, now seen corresponding path program 4 times [2022-11-18 18:54:17,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:17,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618375200] [2022-11-18 18:54:17,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:54:17,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:17,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:17,542 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:17,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2022-11-18 18:54:17,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:54:17,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:17,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:17,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:18,029 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:18,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:18,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:19,004 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:19,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618375200] [2022-11-18 18:54:19,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618375200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:19,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:19,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:19,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962097822] [2022-11-18 18:54:19,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:19,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:19,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:19,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:19,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:19,006 INFO L87 Difference]: Start difference. First operand 9211 states and 44181 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:19,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:19,546 INFO L93 Difference]: Finished difference Result 9361 states and 44805 transitions. [2022-11-18 18:54:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:19,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:19,581 INFO L225 Difference]: With dead ends: 9361 [2022-11-18 18:54:19,581 INFO L226 Difference]: Without dead ends: 9361 [2022-11-18 18:54:19,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:19,582 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:19,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2022-11-18 18:54:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9361 states. [2022-11-18 18:54:19,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9361 to 9209. [2022-11-18 18:54:19,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9209 states, 9204 states have (on average 4.799326379834854) internal successors, (44173), 9208 states have internal predecessors, (44173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9209 states to 9209 states and 44173 transitions. [2022-11-18 18:54:19,794 INFO L78 Accepts]: Start accepts. Automaton has 9209 states and 44173 transitions. Word has length 14 [2022-11-18 18:54:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:19,794 INFO L495 AbstractCegarLoop]: Abstraction has 9209 states and 44173 transitions. [2022-11-18 18:54:19,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 9209 states and 44173 transitions. [2022-11-18 18:54:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:19,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:19,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:19,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Ended with exit code 0 [2022-11-18 18:54:19,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:19,998 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1769361351, now seen corresponding path program 5 times [2022-11-18 18:54:19,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:19,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371730069] [2022-11-18 18:54:19,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:54:19,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:19,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:20,000 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:20,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2022-11-18 18:54:20,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:54:20,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:20,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:54:20,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:20,539 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:20,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:54:21,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:54:21,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:21,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371730069] [2022-11-18 18:54:21,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371730069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:21,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:21,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:54:21,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383637256] [2022-11-18 18:54:21,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:21,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:54:21,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:21,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:54:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:54:21,835 INFO L87 Difference]: Start difference. First operand 9209 states and 44173 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:22,497 INFO L93 Difference]: Finished difference Result 9381 states and 44855 transitions. [2022-11-18 18:54:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:22,499 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:22,534 INFO L225 Difference]: With dead ends: 9381 [2022-11-18 18:54:22,534 INFO L226 Difference]: Without dead ends: 9381 [2022-11-18 18:54:22,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:54:22,534 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 37 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:22,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 19 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2022-11-18 18:54:22,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9381 states. [2022-11-18 18:54:22,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9381 to 9211. [2022-11-18 18:54:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9211 states, 9206 states have (on average 4.7991527264827285) internal successors, (44181), 9210 states have internal predecessors, (44181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9211 states to 9211 states and 44181 transitions. [2022-11-18 18:54:22,752 INFO L78 Accepts]: Start accepts. Automaton has 9211 states and 44181 transitions. Word has length 14 [2022-11-18 18:54:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:22,753 INFO L495 AbstractCegarLoop]: Abstraction has 9211 states and 44181 transitions. [2022-11-18 18:54:22,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 9211 states and 44181 transitions. [2022-11-18 18:54:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:22,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:22,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:22,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Ended with exit code 0 [2022-11-18 18:54:22,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:22,956 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2031812377, now seen corresponding path program 6 times [2022-11-18 18:54:22,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:22,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36602671] [2022-11-18 18:54:22,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:54:22,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:22,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:22,958 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:22,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2022-11-18 18:54:23,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:54:23,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:23,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:23,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:23,534 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:23,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:23,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:24,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36602671] [2022-11-18 18:54:24,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36602671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:24,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:24,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:24,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696727181] [2022-11-18 18:54:24,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:24,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:24,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:24,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:24,682 INFO L87 Difference]: Start difference. First operand 9211 states and 44181 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:25,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:25,268 INFO L93 Difference]: Finished difference Result 9445 states and 45179 transitions. [2022-11-18 18:54:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:25,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:25,301 INFO L225 Difference]: With dead ends: 9445 [2022-11-18 18:54:25,301 INFO L226 Difference]: Without dead ends: 9445 [2022-11-18 18:54:25,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:25,302 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:25,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 26 Unchecked, 0.5s Time] [2022-11-18 18:54:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2022-11-18 18:54:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 9237. [2022-11-18 18:54:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9237 states, 9232 states have (on average 4.799068457538994) internal successors, (44305), 9236 states have internal predecessors, (44305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:25,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9237 states to 9237 states and 44305 transitions. [2022-11-18 18:54:25,508 INFO L78 Accepts]: Start accepts. Automaton has 9237 states and 44305 transitions. Word has length 14 [2022-11-18 18:54:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:25,508 INFO L495 AbstractCegarLoop]: Abstraction has 9237 states and 44305 transitions. [2022-11-18 18:54:25,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 9237 states and 44305 transitions. [2022-11-18 18:54:25,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:25,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:25,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:25,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Ended with exit code 0 [2022-11-18 18:54:25,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:25,712 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:25,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:25,713 INFO L85 PathProgramCache]: Analyzing trace with hash 2031818887, now seen corresponding path program 7 times [2022-11-18 18:54:25,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:25,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691430463] [2022-11-18 18:54:25,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:54:25,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:25,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:25,714 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:25,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2022-11-18 18:54:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:54:26,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:26,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:26,184 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:26,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:26,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:27,333 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:27,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691430463] [2022-11-18 18:54:27,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691430463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:27,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:27,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:27,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875068770] [2022-11-18 18:54:27,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:27,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:27,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:27,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:27,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:27,334 INFO L87 Difference]: Start difference. First operand 9237 states and 44305 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:27,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:27,860 INFO L93 Difference]: Finished difference Result 9329 states and 44723 transitions. [2022-11-18 18:54:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:54:27,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:27,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:27,895 INFO L225 Difference]: With dead ends: 9329 [2022-11-18 18:54:27,895 INFO L226 Difference]: Without dead ends: 9329 [2022-11-18 18:54:27,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:27,895 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:27,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 16 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-11-18 18:54:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2022-11-18 18:54:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 9239. [2022-11-18 18:54:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9239 states, 9234 states have (on average 4.798895386614685) internal successors, (44313), 9238 states have internal predecessors, (44313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9239 states to 9239 states and 44313 transitions. [2022-11-18 18:54:28,130 INFO L78 Accepts]: Start accepts. Automaton has 9239 states and 44313 transitions. Word has length 14 [2022-11-18 18:54:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:28,130 INFO L495 AbstractCegarLoop]: Abstraction has 9239 states and 44313 transitions. [2022-11-18 18:54:28,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:28,130 INFO L276 IsEmpty]: Start isEmpty. Operand 9239 states and 44313 transitions. [2022-11-18 18:54:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:28,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:28,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:28,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Ended with exit code 0 [2022-11-18 18:54:28,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:28,334 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:28,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:28,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2032526617, now seen corresponding path program 8 times [2022-11-18 18:54:28,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:28,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830227271] [2022-11-18 18:54:28,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:54:28,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:28,336 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:28,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Waiting until timeout for monitored process [2022-11-18 18:54:28,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:54:28,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:28,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:28,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:28,957 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:28,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:29,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:30,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:30,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830227271] [2022-11-18 18:54:30,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830227271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:30,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:30,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:30,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143157723] [2022-11-18 18:54:30,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:30,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:30,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:30,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:30,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:30,112 INFO L87 Difference]: Start difference. First operand 9239 states and 44313 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:30,747 INFO L93 Difference]: Finished difference Result 9379 states and 44965 transitions. [2022-11-18 18:54:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:30,749 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:30,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:30,778 INFO L225 Difference]: With dead ends: 9379 [2022-11-18 18:54:30,778 INFO L226 Difference]: Without dead ends: 9379 [2022-11-18 18:54:30,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:30,778 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:30,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-11-18 18:54:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9379 states. [2022-11-18 18:54:30,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9379 to 9281. [2022-11-18 18:54:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9281 states, 9276 states have (on average 4.800668391548081) internal successors, (44531), 9280 states have internal predecessors, (44531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9281 states to 9281 states and 44531 transitions. [2022-11-18 18:54:31,014 INFO L78 Accepts]: Start accepts. Automaton has 9281 states and 44531 transitions. Word has length 14 [2022-11-18 18:54:31,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:31,015 INFO L495 AbstractCegarLoop]: Abstraction has 9281 states and 44531 transitions. [2022-11-18 18:54:31,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 9281 states and 44531 transitions. [2022-11-18 18:54:31,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:31,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:31,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:31,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Ended with exit code 0 [2022-11-18 18:54:31,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:31,220 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2102478819, now seen corresponding path program 9 times [2022-11-18 18:54:31,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:31,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509833558] [2022-11-18 18:54:31,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:54:31,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:31,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:31,221 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:31,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2022-11-18 18:54:31,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:54:31,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:31,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:31,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:31,803 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:31,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:32,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:32,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:32,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509833558] [2022-11-18 18:54:32,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509833558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:32,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:32,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:32,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033662855] [2022-11-18 18:54:32,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:32,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:32,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:32,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:32,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:32,842 INFO L87 Difference]: Start difference. First operand 9281 states and 44531 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:33,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:33,067 INFO L93 Difference]: Finished difference Result 9461 states and 45379 transitions. [2022-11-18 18:54:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:33,098 INFO L225 Difference]: With dead ends: 9461 [2022-11-18 18:54:33,099 INFO L226 Difference]: Without dead ends: 9461 [2022-11-18 18:54:33,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:33,099 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:33,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-11-18 18:54:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9461 states. [2022-11-18 18:54:33,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9461 to 9281. [2022-11-18 18:54:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9281 states, 9276 states have (on average 4.800668391548081) internal successors, (44531), 9280 states have internal predecessors, (44531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9281 states to 9281 states and 44531 transitions. [2022-11-18 18:54:33,307 INFO L78 Accepts]: Start accepts. Automaton has 9281 states and 44531 transitions. Word has length 14 [2022-11-18 18:54:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:33,307 INFO L495 AbstractCegarLoop]: Abstraction has 9281 states and 44531 transitions. [2022-11-18 18:54:33,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 9281 states and 44531 transitions. [2022-11-18 18:54:33,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:33,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:33,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:33,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Ended with exit code 0 [2022-11-18 18:54:33,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:33,511 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:33,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2102463009, now seen corresponding path program 10 times [2022-11-18 18:54:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:33,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423959240] [2022-11-18 18:54:33,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:54:33,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:33,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:33,513 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:33,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2022-11-18 18:54:33,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:54:33,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:33,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:33,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:34,014 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:34,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:34,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:35,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:35,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423959240] [2022-11-18 18:54:35,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423959240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:35,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:35,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:35,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682069580] [2022-11-18 18:54:35,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:35,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:35,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:35,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:35,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:35,083 INFO L87 Difference]: Start difference. First operand 9281 states and 44531 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:35,594 INFO L93 Difference]: Finished difference Result 9371 states and 44975 transitions. [2022-11-18 18:54:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:35,596 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:35,634 INFO L225 Difference]: With dead ends: 9371 [2022-11-18 18:54:35,634 INFO L226 Difference]: Without dead ends: 9371 [2022-11-18 18:54:35,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:35,634 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:35,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-11-18 18:54:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9371 states. [2022-11-18 18:54:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9371 to 9281. [2022-11-18 18:54:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9281 states, 9276 states have (on average 4.800668391548081) internal successors, (44531), 9280 states have internal predecessors, (44531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9281 states to 9281 states and 44531 transitions. [2022-11-18 18:54:35,842 INFO L78 Accepts]: Start accepts. Automaton has 9281 states and 44531 transitions. Word has length 14 [2022-11-18 18:54:35,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:35,842 INFO L495 AbstractCegarLoop]: Abstraction has 9281 states and 44531 transitions. [2022-11-18 18:54:35,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 9281 states and 44531 transitions. [2022-11-18 18:54:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:35,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:35,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:35,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Ended with exit code 0 [2022-11-18 18:54:36,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:36,047 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:36,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:36,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2102462823, now seen corresponding path program 1 times [2022-11-18 18:54:36,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:36,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491757899] [2022-11-18 18:54:36,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:54:36,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:36,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:36,048 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:36,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2022-11-18 18:54:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:54:36,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:36,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:36,562 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:36,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:36,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:37,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:37,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:37,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491757899] [2022-11-18 18:54:37,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491757899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:37,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:37,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:37,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296783413] [2022-11-18 18:54:37,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:37,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:37,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:37,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:37,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:37,637 INFO L87 Difference]: Start difference. First operand 9281 states and 44531 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:38,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:38,139 INFO L93 Difference]: Finished difference Result 9347 states and 44847 transitions. [2022-11-18 18:54:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:38,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:38,174 INFO L225 Difference]: With dead ends: 9347 [2022-11-18 18:54:38,174 INFO L226 Difference]: Without dead ends: 9347 [2022-11-18 18:54:38,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:38,175 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:38,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2022-11-18 18:54:38,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9347 states. [2022-11-18 18:54:38,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9347 to 9279. [2022-11-18 18:54:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9279 states, 9274 states have (on average 4.800625404356265) internal successors, (44521), 9278 states have internal predecessors, (44521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9279 states to 9279 states and 44521 transitions. [2022-11-18 18:54:38,401 INFO L78 Accepts]: Start accepts. Automaton has 9279 states and 44521 transitions. Word has length 14 [2022-11-18 18:54:38,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:38,401 INFO L495 AbstractCegarLoop]: Abstraction has 9279 states and 44521 transitions. [2022-11-18 18:54:38,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:38,401 INFO L276 IsEmpty]: Start isEmpty. Operand 9279 states and 44521 transitions. [2022-11-18 18:54:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:38,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:38,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:38,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Ended with exit code 0 [2022-11-18 18:54:38,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:38,605 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:38,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2102473053, now seen corresponding path program 2 times [2022-11-18 18:54:38,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:38,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471976318] [2022-11-18 18:54:38,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:54:38,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:38,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:38,607 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:38,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2022-11-18 18:54:38,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:54:38,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:38,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:39,124 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:39,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:39,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:40,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:40,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471976318] [2022-11-18 18:54:40,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471976318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:40,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:40,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:40,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054522266] [2022-11-18 18:54:40,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:40,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:40,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:40,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:40,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:40,323 INFO L87 Difference]: Start difference. First operand 9279 states and 44521 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:40,881 INFO L93 Difference]: Finished difference Result 9379 states and 44993 transitions. [2022-11-18 18:54:40,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:40,883 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:40,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:40,920 INFO L225 Difference]: With dead ends: 9379 [2022-11-18 18:54:40,921 INFO L226 Difference]: Without dead ends: 9379 [2022-11-18 18:54:40,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:40,921 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:40,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 35 Unchecked, 0.4s Time] [2022-11-18 18:54:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9379 states. [2022-11-18 18:54:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9379 to 9277. [2022-11-18 18:54:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9277 states, 9272 states have (on average 4.8005823986194995) internal successors, (44511), 9276 states have internal predecessors, (44511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9277 states to 9277 states and 44511 transitions. [2022-11-18 18:54:41,160 INFO L78 Accepts]: Start accepts. Automaton has 9277 states and 44511 transitions. Word has length 14 [2022-11-18 18:54:41,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:41,160 INFO L495 AbstractCegarLoop]: Abstraction has 9277 states and 44511 transitions. [2022-11-18 18:54:41,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:41,160 INFO L276 IsEmpty]: Start isEmpty. Operand 9277 states and 44511 transitions. [2022-11-18 18:54:41,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:41,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:41,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:41,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Ended with exit code 0 [2022-11-18 18:54:41,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:41,365 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:41,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:41,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2097831423, now seen corresponding path program 3 times [2022-11-18 18:54:41,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:41,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685679818] [2022-11-18 18:54:41,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:54:41,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:41,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:41,366 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:41,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2022-11-18 18:54:41,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:54:41,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:41,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:41,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:41,909 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:41,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:54:42,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:54:43,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:43,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685679818] [2022-11-18 18:54:43,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685679818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:43,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:43,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:43,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791183774] [2022-11-18 18:54:43,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:43,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:43,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:43,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:43,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:43,039 INFO L87 Difference]: Start difference. First operand 9277 states and 44511 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:43,604 INFO L93 Difference]: Finished difference Result 9393 states and 45047 transitions. [2022-11-18 18:54:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:54:43,606 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:43,641 INFO L225 Difference]: With dead ends: 9393 [2022-11-18 18:54:43,641 INFO L226 Difference]: Without dead ends: 9393 [2022-11-18 18:54:43,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:43,642 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:43,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 35 Unchecked, 0.4s Time] [2022-11-18 18:54:43,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9393 states. [2022-11-18 18:54:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9393 to 9273. [2022-11-18 18:54:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9273 states, 9268 states have (on average 4.800712127751403) internal successors, (44493), 9272 states have internal predecessors, (44493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9273 states to 9273 states and 44493 transitions. [2022-11-18 18:54:43,870 INFO L78 Accepts]: Start accepts. Automaton has 9273 states and 44493 transitions. Word has length 14 [2022-11-18 18:54:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:43,870 INFO L495 AbstractCegarLoop]: Abstraction has 9273 states and 44493 transitions. [2022-11-18 18:54:43,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 9273 states and 44493 transitions. [2022-11-18 18:54:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:43,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:43,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:43,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Ended with exit code 0 [2022-11-18 18:54:44,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:44,075 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:44,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:44,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1769955997, now seen corresponding path program 11 times [2022-11-18 18:54:44,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:44,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127403472] [2022-11-18 18:54:44,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:54:44,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:44,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:44,076 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:44,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Waiting until timeout for monitored process [2022-11-18 18:54:44,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:54:44,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:44,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:54:44,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:44,602 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:44,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:54:45,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:54:45,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:45,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127403472] [2022-11-18 18:54:45,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127403472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:45,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:45,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:54:45,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994247125] [2022-11-18 18:54:45,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:45,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:54:45,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:45,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:54:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:54:45,923 INFO L87 Difference]: Start difference. First operand 9273 states and 44493 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:46,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:46,473 INFO L93 Difference]: Finished difference Result 9329 states and 44759 transitions. [2022-11-18 18:54:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:46,474 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:46,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:46,505 INFO L225 Difference]: With dead ends: 9329 [2022-11-18 18:54:46,506 INFO L226 Difference]: Without dead ends: 9329 [2022-11-18 18:54:46,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:54:46,506 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:46,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 59 Unchecked, 0.4s Time] [2022-11-18 18:54:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2022-11-18 18:54:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 9269. [2022-11-18 18:54:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9269 states, 9264 states have (on average 4.801057858376511) internal successors, (44477), 9268 states have internal predecessors, (44477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9269 states to 9269 states and 44477 transitions. [2022-11-18 18:54:46,753 INFO L78 Accepts]: Start accepts. Automaton has 9269 states and 44477 transitions. Word has length 14 [2022-11-18 18:54:46,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:46,754 INFO L495 AbstractCegarLoop]: Abstraction has 9269 states and 44477 transitions. [2022-11-18 18:54:46,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:46,754 INFO L276 IsEmpty]: Start isEmpty. Operand 9269 states and 44477 transitions. [2022-11-18 18:54:46,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:46,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:46,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:46,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Ended with exit code 0 [2022-11-18 18:54:46,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:46,958 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:46,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:46,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1644423667, now seen corresponding path program 12 times [2022-11-18 18:54:46,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:46,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398614148] [2022-11-18 18:54:46,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:54:46,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:46,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:46,963 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:46,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2022-11-18 18:54:47,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:54:47,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:47,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:47,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:47,504 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:47,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:47,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:48,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398614148] [2022-11-18 18:54:48,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398614148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:48,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:48,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:48,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896894514] [2022-11-18 18:54:48,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:48,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:48,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:48,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:48,442 INFO L87 Difference]: Start difference. First operand 9269 states and 44477 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:48,983 INFO L93 Difference]: Finished difference Result 9473 states and 45365 transitions. [2022-11-18 18:54:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:48,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:48,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:49,024 INFO L225 Difference]: With dead ends: 9473 [2022-11-18 18:54:49,024 INFO L226 Difference]: Without dead ends: 9473 [2022-11-18 18:54:49,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:49,024 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:49,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-18 18:54:49,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9473 states. [2022-11-18 18:54:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9473 to 9279. [2022-11-18 18:54:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9279 states, 9274 states have (on average 4.802135001078283) internal successors, (44535), 9278 states have internal predecessors, (44535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9279 states to 9279 states and 44535 transitions. [2022-11-18 18:54:49,254 INFO L78 Accepts]: Start accepts. Automaton has 9279 states and 44535 transitions. Word has length 14 [2022-11-18 18:54:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:49,255 INFO L495 AbstractCegarLoop]: Abstraction has 9279 states and 44535 transitions. [2022-11-18 18:54:49,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:49,255 INFO L276 IsEmpty]: Start isEmpty. Operand 9279 states and 44535 transitions. [2022-11-18 18:54:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:54:49,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:49,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:49,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Ended with exit code 0 [2022-11-18 18:54:49,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:49,459 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:49,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:49,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1644647797, now seen corresponding path program 13 times [2022-11-18 18:54:49,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:49,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096151605] [2022-11-18 18:54:49,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:54:49,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:49,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:49,460 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:49,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2022-11-18 18:54:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:54:49,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:54:49,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:49,983 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:49,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:50,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:54:51,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:51,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096151605] [2022-11-18 18:54:51,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096151605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:51,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:51,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:54:51,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47077870] [2022-11-18 18:54:51,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:51,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:54:51,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:54:51,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:54:51,069 INFO L87 Difference]: Start difference. First operand 9279 states and 44535 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:51,550 INFO L93 Difference]: Finished difference Result 9353 states and 44869 transitions. [2022-11-18 18:54:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:54:51,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:54:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:51,582 INFO L225 Difference]: With dead ends: 9353 [2022-11-18 18:54:51,583 INFO L226 Difference]: Without dead ends: 9353 [2022-11-18 18:54:51,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:54:51,583 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:51,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 25 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-11-18 18:54:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9353 states. [2022-11-18 18:54:51,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9353 to 9275. [2022-11-18 18:54:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9275 states, 9270 states have (on average 4.802049622437972) internal successors, (44515), 9274 states have internal predecessors, (44515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9275 states to 9275 states and 44515 transitions. [2022-11-18 18:54:51,829 INFO L78 Accepts]: Start accepts. Automaton has 9275 states and 44515 transitions. Word has length 14 [2022-11-18 18:54:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:51,830 INFO L495 AbstractCegarLoop]: Abstraction has 9275 states and 44515 transitions. [2022-11-18 18:54:51,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 9275 states and 44515 transitions. [2022-11-18 18:54:51,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:54:51,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:51,836 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:51,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Ended with exit code 0 [2022-11-18 18:54:52,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:52,045 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:54:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:52,046 INFO L85 PathProgramCache]: Analyzing trace with hash -423680585, now seen corresponding path program 6 times [2022-11-18 18:54:52,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:54:52,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558280072] [2022-11-18 18:54:52,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:54:52,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:54:52,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:54:52,047 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:54:52,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (157)] Waiting until timeout for monitored process [2022-11-18 18:54:52,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 18:54:52,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 18:54:52,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:52,609 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:54:52,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:54:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:54:53,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:54:55,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:54:55,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558280072] [2022-11-18 18:54:55,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558280072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:55,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:54:55,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-18 18:54:55,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993341998] [2022-11-18 18:54:55,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:55,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 18:54:55,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:54:55,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 18:54:55,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:54:55,636 INFO L87 Difference]: Start difference. First operand 9275 states and 44515 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:55:12,003 INFO L93 Difference]: Finished difference Result 14479 states and 66281 transitions. [2022-11-18 18:55:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 18:55:12,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:55:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:55:12,066 INFO L225 Difference]: With dead ends: 14479 [2022-11-18 18:55:12,066 INFO L226 Difference]: Without dead ends: 14479 [2022-11-18 18:55:12,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 18:55:12,067 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 568 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:55:12,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 176 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1561 Invalid, 0 Unknown, 254 Unchecked, 11.6s Time] [2022-11-18 18:55:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14479 states. [2022-11-18 18:55:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14479 to 9459. [2022-11-18 18:55:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9459 states, 9454 states have (on average 4.808863972921515) internal successors, (45463), 9458 states have internal predecessors, (45463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 45463 transitions. [2022-11-18 18:55:12,362 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 45463 transitions. Word has length 15 [2022-11-18 18:55:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:55:12,363 INFO L495 AbstractCegarLoop]: Abstraction has 9459 states and 45463 transitions. [2022-11-18 18:55:12,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 45463 transitions. [2022-11-18 18:55:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:55:12,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:55:12,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:55:12,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (157)] Ended with exit code 0 [2022-11-18 18:55:12,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:55:12,568 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:55:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:55:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1478584406, now seen corresponding path program 12 times [2022-11-18 18:55:12,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:55:12,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072662564] [2022-11-18 18:55:12,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:55:12,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:55:12,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:55:12,569 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:55:12,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Waiting until timeout for monitored process [2022-11-18 18:55:12,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 18:55:12,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:55:12,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:55:12,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:55:13,161 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:55:13,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:55:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:13,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:55:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:15,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:55:15,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072662564] [2022-11-18 18:55:15,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072662564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:55:15,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:55:15,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 18:55:15,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549538124] [2022-11-18 18:55:15,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:55:15,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:55:15,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:55:15,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:55:15,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:55:15,320 INFO L87 Difference]: Start difference. First operand 9459 states and 45463 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:55:22,256 INFO L93 Difference]: Finished difference Result 13345 states and 63113 transitions. [2022-11-18 18:55:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 18:55:22,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:55:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:55:22,313 INFO L225 Difference]: With dead ends: 13345 [2022-11-18 18:55:22,313 INFO L226 Difference]: Without dead ends: 13345 [2022-11-18 18:55:22,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-11-18 18:55:22,314 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 304 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 489 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:55:22,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 83 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 445 Invalid, 0 Unknown, 489 Unchecked, 3.7s Time] [2022-11-18 18:55:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13345 states. [2022-11-18 18:55:22,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13345 to 10070. [2022-11-18 18:55:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10070 states, 10065 states have (on average 4.829110779930452) internal successors, (48605), 10069 states have internal predecessors, (48605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10070 states to 10070 states and 48605 transitions. [2022-11-18 18:55:22,730 INFO L78 Accepts]: Start accepts. Automaton has 10070 states and 48605 transitions. Word has length 15 [2022-11-18 18:55:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:55:22,730 INFO L495 AbstractCegarLoop]: Abstraction has 10070 states and 48605 transitions. [2022-11-18 18:55:22,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 10070 states and 48605 transitions. [2022-11-18 18:55:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:55:22,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:55:22,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:55:22,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Ended with exit code 0 [2022-11-18 18:55:22,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:55:22,934 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:55:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:55:22,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1478852246, now seen corresponding path program 13 times [2022-11-18 18:55:22,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:55:22,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969097104] [2022-11-18 18:55:22,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:55:22,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:55:22,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:55:22,936 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:55:22,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (159)] Waiting until timeout for monitored process [2022-11-18 18:55:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:55:23,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:55:23,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:55:23,547 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:55:23,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:55:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:24,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:55:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:25,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:55:25,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969097104] [2022-11-18 18:55:25,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969097104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:55:25,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:55:25,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 18:55:25,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502959273] [2022-11-18 18:55:25,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:55:25,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:55:25,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:55:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:55:25,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:55:25,422 INFO L87 Difference]: Start difference. First operand 10070 states and 48605 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:32,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:55:32,110 INFO L93 Difference]: Finished difference Result 13220 states and 62318 transitions. [2022-11-18 18:55:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 18:55:32,113 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:55:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:55:32,164 INFO L225 Difference]: With dead ends: 13220 [2022-11-18 18:55:32,164 INFO L226 Difference]: Without dead ends: 13220 [2022-11-18 18:55:32,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2022-11-18 18:55:32,165 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 201 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:55:32,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 86 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 450 Invalid, 0 Unknown, 353 Unchecked, 3.6s Time] [2022-11-18 18:55:32,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13220 states. [2022-11-18 18:55:32,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13220 to 10356. [2022-11-18 18:55:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10356 states, 10351 states have (on average 4.833735870930345) internal successors, (50034), 10355 states have internal predecessors, (50034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10356 states to 10356 states and 50034 transitions. [2022-11-18 18:55:32,435 INFO L78 Accepts]: Start accepts. Automaton has 10356 states and 50034 transitions. Word has length 15 [2022-11-18 18:55:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:55:32,435 INFO L495 AbstractCegarLoop]: Abstraction has 10356 states and 50034 transitions. [2022-11-18 18:55:32,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:32,435 INFO L276 IsEmpty]: Start isEmpty. Operand 10356 states and 50034 transitions. [2022-11-18 18:55:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:55:32,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:55:32,439 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:55:32,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (159)] Ended with exit code 0 [2022-11-18 18:55:32,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:55:32,640 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:55:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:55:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash 620304522, now seen corresponding path program 14 times [2022-11-18 18:55:32,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:55:32,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634648802] [2022-11-18 18:55:32,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:55:32,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:55:32,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:55:32,641 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:55:32,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Waiting until timeout for monitored process [2022-11-18 18:55:33,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:55:33,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:55:33,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:55:33,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:55:33,217 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:55:33,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:55:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:33,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:55:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:35,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:55:35,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634648802] [2022-11-18 18:55:35,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634648802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:55:35,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:55:35,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 18:55:35,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112422549] [2022-11-18 18:55:35,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:55:35,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:55:35,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:55:35,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:55:35,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:55:35,301 INFO L87 Difference]: Start difference. First operand 10356 states and 50034 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:55:38,778 INFO L93 Difference]: Finished difference Result 14576 states and 69701 transitions. [2022-11-18 18:55:38,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:55:38,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:55:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:55:38,837 INFO L225 Difference]: With dead ends: 14576 [2022-11-18 18:55:38,837 INFO L226 Difference]: Without dead ends: 14576 [2022-11-18 18:55:38,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:55:38,837 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 165 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:55:38,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 74 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 329 Invalid, 0 Unknown, 246 Unchecked, 2.1s Time] [2022-11-18 18:55:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14576 states. [2022-11-18 18:55:39,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14576 to 11465. [2022-11-18 18:55:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11465 states, 11460 states have (on average 4.890663176265271) internal successors, (56047), 11464 states have internal predecessors, (56047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11465 states to 11465 states and 56047 transitions. [2022-11-18 18:55:39,154 INFO L78 Accepts]: Start accepts. Automaton has 11465 states and 56047 transitions. Word has length 15 [2022-11-18 18:55:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:55:39,154 INFO L495 AbstractCegarLoop]: Abstraction has 11465 states and 56047 transitions. [2022-11-18 18:55:39,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 11465 states and 56047 transitions. [2022-11-18 18:55:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:55:39,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:55:39,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:55:39,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Ended with exit code 0 [2022-11-18 18:55:39,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:55:39,360 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:55:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:55:39,360 INFO L85 PathProgramCache]: Analyzing trace with hash 620312892, now seen corresponding path program 15 times [2022-11-18 18:55:39,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:55:39,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890206651] [2022-11-18 18:55:39,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:55:39,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:55:39,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:55:39,362 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:55:39,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Waiting until timeout for monitored process [2022-11-18 18:55:39,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:55:39,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:55:39,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:55:39,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:55:39,989 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:55:39,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:55:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:40,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:55:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:42,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:55:42,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890206651] [2022-11-18 18:55:42,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890206651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:55:42,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:55:42,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 18:55:42,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185787353] [2022-11-18 18:55:42,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:55:42,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:55:42,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:55:42,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:55:42,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:55:42,196 INFO L87 Difference]: Start difference. First operand 11465 states and 56047 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:47,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:55:47,974 INFO L93 Difference]: Finished difference Result 14863 states and 71509 transitions. [2022-11-18 18:55:47,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 18:55:47,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:55:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:55:48,034 INFO L225 Difference]: With dead ends: 14863 [2022-11-18 18:55:48,034 INFO L226 Difference]: Without dead ends: 14863 [2022-11-18 18:55:48,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:55:48,034 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 252 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:55:48,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 60 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 453 Invalid, 0 Unknown, 314 Unchecked, 3.5s Time] [2022-11-18 18:55:48,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14863 states. [2022-11-18 18:55:48,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14863 to 12193. [2022-11-18 18:55:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12193 states, 12188 states have (on average 4.929192648506728) internal successors, (60077), 12192 states have internal predecessors, (60077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12193 states to 12193 states and 60077 transitions. [2022-11-18 18:55:48,373 INFO L78 Accepts]: Start accepts. Automaton has 12193 states and 60077 transitions. Word has length 15 [2022-11-18 18:55:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:55:48,373 INFO L495 AbstractCegarLoop]: Abstraction has 12193 states and 60077 transitions. [2022-11-18 18:55:48,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 12193 states and 60077 transitions. [2022-11-18 18:55:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:55:48,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:55:48,378 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:55:48,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Ended with exit code 0 [2022-11-18 18:55:48,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:55:48,579 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:55:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:55:48,579 INFO L85 PathProgramCache]: Analyzing trace with hash 620006333, now seen corresponding path program 12 times [2022-11-18 18:55:48,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:55:48,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230786257] [2022-11-18 18:55:48,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:55:48,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:55:48,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:55:48,581 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:55:48,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Waiting until timeout for monitored process [2022-11-18 18:55:48,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:55:48,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:55:49,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 18:55:49,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:55:49,180 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:55:49,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:55:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 18:55:49,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:55:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:51,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:55:51,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230786257] [2022-11-18 18:55:51,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230786257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:55:51,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:55:51,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2022-11-18 18:55:51,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340080599] [2022-11-18 18:55:51,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:55:51,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:55:51,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:55:51,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:55:51,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:55:51,673 INFO L87 Difference]: Start difference. First operand 12193 states and 60077 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:00,685 INFO L93 Difference]: Finished difference Result 13385 states and 63691 transitions. [2022-11-18 18:56:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 18:56:00,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:56:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:00,741 INFO L225 Difference]: With dead ends: 13385 [2022-11-18 18:56:00,741 INFO L226 Difference]: Without dead ends: 13385 [2022-11-18 18:56:00,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:56:00,742 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 276 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:00,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 118 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-18 18:56:00,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13385 states. [2022-11-18 18:56:01,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13385 to 12115. [2022-11-18 18:56:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12115 states, 12110 states have (on average 4.880429397192403) internal successors, (59102), 12114 states have internal predecessors, (59102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12115 states to 12115 states and 59102 transitions. [2022-11-18 18:56:01,169 INFO L78 Accepts]: Start accepts. Automaton has 12115 states and 59102 transitions. Word has length 15 [2022-11-18 18:56:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:01,170 INFO L495 AbstractCegarLoop]: Abstraction has 12115 states and 59102 transitions. [2022-11-18 18:56:01,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 12115 states and 59102 transitions. [2022-11-18 18:56:01,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:56:01,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:01,175 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:01,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Ended with exit code 0 [2022-11-18 18:56:01,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:01,375 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:56:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash 620572362, now seen corresponding path program 16 times [2022-11-18 18:56:01,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:01,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211339619] [2022-11-18 18:56:01,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:56:01,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:01,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:01,378 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:01,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (163)] Waiting until timeout for monitored process [2022-11-18 18:56:01,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:56:01,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:56:01,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:56:01,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:02,017 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:56:02,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:56:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:02,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:04,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:04,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211339619] [2022-11-18 18:56:04,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211339619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:04,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:04,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 18:56:04,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512516248] [2022-11-18 18:56:04,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:04,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:56:04,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:04,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:56:04,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:56:04,175 INFO L87 Difference]: Start difference. First operand 12115 states and 59102 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:07,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:07,377 INFO L93 Difference]: Finished difference Result 16352 states and 79273 transitions. [2022-11-18 18:56:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:56:07,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:56:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:07,445 INFO L225 Difference]: With dead ends: 16352 [2022-11-18 18:56:07,445 INFO L226 Difference]: Without dead ends: 16352 [2022-11-18 18:56:07,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:56:07,445 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 131 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:07,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 69 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 251 Invalid, 0 Unknown, 307 Unchecked, 1.6s Time] [2022-11-18 18:56:07,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16352 states. [2022-11-18 18:56:07,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16352 to 12979. [2022-11-18 18:56:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12979 states, 12974 states have (on average 4.906813627254509) internal successors, (63661), 12978 states have internal predecessors, (63661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12979 states to 12979 states and 63661 transitions. [2022-11-18 18:56:07,815 INFO L78 Accepts]: Start accepts. Automaton has 12979 states and 63661 transitions. Word has length 15 [2022-11-18 18:56:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:07,815 INFO L495 AbstractCegarLoop]: Abstraction has 12979 states and 63661 transitions. [2022-11-18 18:56:07,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:07,815 INFO L276 IsEmpty]: Start isEmpty. Operand 12979 states and 63661 transitions. [2022-11-18 18:56:07,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:56:07,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:07,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:07,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (163)] Ended with exit code 0 [2022-11-18 18:56:08,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:08,020 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:56:08,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:08,021 INFO L85 PathProgramCache]: Analyzing trace with hash 607792302, now seen corresponding path program 17 times [2022-11-18 18:56:08,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:08,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813438349] [2022-11-18 18:56:08,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:56:08,021 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 [2022-11-18 18:56:08,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:08,022 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:08,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Waiting until timeout for monitored process [2022-11-18 18:56:08,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 18:56:08,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:56:08,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 18:56:08,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:08,742 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:56:08,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:56:09,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-18 18:56:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:09,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:09,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-18 18:56:09,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-18 18:56:09,844 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 18:56:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:12,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:12,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813438349] [2022-11-18 18:56:12,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813438349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:12,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:12,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 18:56:12,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9090396] [2022-11-18 18:56:12,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:12,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:56:12,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:12,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:56:12,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:56:12,053 INFO L87 Difference]: Start difference. First operand 12979 states and 63661 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:17,651 INFO L93 Difference]: Finished difference Result 17896 states and 88026 transitions. [2022-11-18 18:56:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:56:17,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:56:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:17,727 INFO L225 Difference]: With dead ends: 17896 [2022-11-18 18:56:17,727 INFO L226 Difference]: Without dead ends: 17896 [2022-11-18 18:56:17,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:56:17,727 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 127 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:17,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 63 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 376 Invalid, 0 Unknown, 217 Unchecked, 3.3s Time] [2022-11-18 18:56:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17896 states. [2022-11-18 18:56:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17896 to 13909. [2022-11-18 18:56:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13909 states, 13904 states have (on average 4.92433831990794) internal successors, (68468), 13908 states have internal predecessors, (68468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13909 states to 13909 states and 68468 transitions. [2022-11-18 18:56:18,133 INFO L78 Accepts]: Start accepts. Automaton has 13909 states and 68468 transitions. Word has length 15 [2022-11-18 18:56:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:18,133 INFO L495 AbstractCegarLoop]: Abstraction has 13909 states and 68468 transitions. [2022-11-18 18:56:18,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 13909 states and 68468 transitions. [2022-11-18 18:56:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:56:18,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:18,139 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:18,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Ended with exit code 0 [2022-11-18 18:56:18,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:18,339 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:56:18,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:18,340 INFO L85 PathProgramCache]: Analyzing trace with hash 615700092, now seen corresponding path program 18 times [2022-11-18 18:56:18,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:18,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516239966] [2022-11-18 18:56:18,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:56:18,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:18,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:18,341 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:18,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (165)] Waiting until timeout for monitored process [2022-11-18 18:56:18,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:56:18,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:56:18,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:56:18,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:18,952 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:56:18,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:56:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:19,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:21,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:21,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516239966] [2022-11-18 18:56:21,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516239966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:21,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:21,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 18:56:21,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050757722] [2022-11-18 18:56:21,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:21,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:56:21,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:21,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:56:21,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:56:21,200 INFO L87 Difference]: Start difference. First operand 13909 states and 68468 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:28,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:28,930 INFO L93 Difference]: Finished difference Result 20331 states and 96657 transitions. [2022-11-18 18:56:28,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 18:56:28,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:56:28,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:29,023 INFO L225 Difference]: With dead ends: 20331 [2022-11-18 18:56:29,023 INFO L226 Difference]: Without dead ends: 20331 [2022-11-18 18:56:29,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-11-18 18:56:29,024 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 281 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 704 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:29,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 94 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 568 Invalid, 0 Unknown, 704 Unchecked, 4.7s Time] [2022-11-18 18:56:29,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20331 states. [2022-11-18 18:56:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20331 to 12032. [2022-11-18 18:56:29,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12032 states, 12027 states have (on average 4.882264903966076) internal successors, (58719), 12031 states have internal predecessors, (58719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12032 states to 12032 states and 58719 transitions. [2022-11-18 18:56:29,629 INFO L78 Accepts]: Start accepts. Automaton has 12032 states and 58719 transitions. Word has length 15 [2022-11-18 18:56:29,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:29,630 INFO L495 AbstractCegarLoop]: Abstraction has 12032 states and 58719 transitions. [2022-11-18 18:56:29,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:29,630 INFO L276 IsEmpty]: Start isEmpty. Operand 12032 states and 58719 transitions. [2022-11-18 18:56:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:56:29,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:29,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:29,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (165)] Ended with exit code 0 [2022-11-18 18:56:29,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:29,834 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:56:29,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:29,835 INFO L85 PathProgramCache]: Analyzing trace with hash 208666888, now seen corresponding path program 9 times [2022-11-18 18:56:29,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:29,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883698734] [2022-11-18 18:56:29,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:56:29,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:29,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:29,837 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:29,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Waiting until timeout for monitored process [2022-11-18 18:56:30,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:56:30,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:56:30,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:56:30,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:30,487 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:56:30,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:56:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:31,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:32,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:32,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883698734] [2022-11-18 18:56:32,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883698734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:32,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:32,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 18:56:32,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308973515] [2022-11-18 18:56:32,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:32,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:56:32,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:32,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:56:32,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:56:32,683 INFO L87 Difference]: Start difference. First operand 12032 states and 58719 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:38,880 INFO L93 Difference]: Finished difference Result 16024 states and 76772 transitions. [2022-11-18 18:56:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:56:38,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:56:38,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:38,948 INFO L225 Difference]: With dead ends: 16024 [2022-11-18 18:56:38,948 INFO L226 Difference]: Without dead ends: 16024 [2022-11-18 18:56:38,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-11-18 18:56:38,948 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 308 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:38,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 65 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 500 Invalid, 0 Unknown, 346 Unchecked, 4.1s Time] [2022-11-18 18:56:38,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16024 states. [2022-11-18 18:56:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16024 to 13356. [2022-11-18 18:56:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13356 states, 13351 states have (on average 4.916485656505131) internal successors, (65640), 13355 states have internal predecessors, (65640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13356 states to 13356 states and 65640 transitions. [2022-11-18 18:56:39,333 INFO L78 Accepts]: Start accepts. Automaton has 13356 states and 65640 transitions. Word has length 15 [2022-11-18 18:56:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:39,333 INFO L495 AbstractCegarLoop]: Abstraction has 13356 states and 65640 transitions. [2022-11-18 18:56:39,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:39,333 INFO L276 IsEmpty]: Start isEmpty. Operand 13356 states and 65640 transitions. [2022-11-18 18:56:39,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:56:39,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:39,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:39,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Ended with exit code 0 [2022-11-18 18:56:39,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:39,539 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:56:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:39,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1783447594, now seen corresponding path program 9 times [2022-11-18 18:56:39,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:39,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703375878] [2022-11-18 18:56:39,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:56:39,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:39,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:39,540 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:39,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Waiting until timeout for monitored process [2022-11-18 18:56:39,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:56:39,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:56:39,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:56:39,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:40,151 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:56:40,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:56:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:40,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:42,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:42,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703375878] [2022-11-18 18:56:42,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703375878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:42,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:42,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 18:56:42,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115566813] [2022-11-18 18:56:42,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:42,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:56:42,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:42,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:56:42,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:56:42,474 INFO L87 Difference]: Start difference. First operand 13356 states and 65640 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:44,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:44,410 INFO L93 Difference]: Finished difference Result 13638 states and 66770 transitions. [2022-11-18 18:56:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:56:44,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:56:44,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:44,468 INFO L225 Difference]: With dead ends: 13638 [2022-11-18 18:56:44,468 INFO L226 Difference]: Without dead ends: 13638 [2022-11-18 18:56:44,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-11-18 18:56:44,469 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:44,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 72 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 146 Unchecked, 0.9s Time] [2022-11-18 18:56:44,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13638 states. [2022-11-18 18:56:44,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13638 to 13446. [2022-11-18 18:56:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13446 states, 13441 states have (on average 4.91198571534856) internal successors, (66022), 13445 states have internal predecessors, (66022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13446 states to 13446 states and 66022 transitions. [2022-11-18 18:56:44,826 INFO L78 Accepts]: Start accepts. Automaton has 13446 states and 66022 transitions. Word has length 15 [2022-11-18 18:56:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:44,826 INFO L495 AbstractCegarLoop]: Abstraction has 13446 states and 66022 transitions. [2022-11-18 18:56:44,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 13446 states and 66022 transitions. [2022-11-18 18:56:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:56:44,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:44,832 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:44,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Ended with exit code 0 [2022-11-18 18:56:45,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:45,033 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:56:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1763061994, now seen corresponding path program 10 times [2022-11-18 18:56:45,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:45,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657956133] [2022-11-18 18:56:45,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:56:45,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:45,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:45,035 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:45,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Waiting until timeout for monitored process [2022-11-18 18:56:45,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:56:45,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:56:45,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:56:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:45,671 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:56:45,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:56:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:46,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:47,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:47,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657956133] [2022-11-18 18:56:47,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657956133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:47,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:47,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 18:56:47,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807517707] [2022-11-18 18:56:47,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:47,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:56:47,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:47,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:56:47,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:56:47,858 INFO L87 Difference]: Start difference. First operand 13446 states and 66022 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:49,220 INFO L93 Difference]: Finished difference Result 13871 states and 67603 transitions. [2022-11-18 18:56:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:56:49,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:56:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:49,280 INFO L225 Difference]: With dead ends: 13871 [2022-11-18 18:56:49,280 INFO L226 Difference]: Without dead ends: 13871 [2022-11-18 18:56:49,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:56:49,281 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 87 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:49,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 58 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 180 Unchecked, 0.6s Time] [2022-11-18 18:56:49,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13871 states. [2022-11-18 18:56:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13871 to 13462. [2022-11-18 18:56:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13462 states, 13457 states have (on average 4.9111986326818755) internal successors, (66090), 13461 states have internal predecessors, (66090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:49,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13462 states to 13462 states and 66090 transitions. [2022-11-18 18:56:49,652 INFO L78 Accepts]: Start accepts. Automaton has 13462 states and 66090 transitions. Word has length 15 [2022-11-18 18:56:49,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:49,652 INFO L495 AbstractCegarLoop]: Abstraction has 13462 states and 66090 transitions. [2022-11-18 18:56:49,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:49,652 INFO L276 IsEmpty]: Start isEmpty. Operand 13462 states and 66090 transitions. [2022-11-18 18:56:49,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:56:49,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:49,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:49,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Ended with exit code 0 [2022-11-18 18:56:49,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:49,858 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:56:49,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:49,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1803089589, now seen corresponding path program 1 times [2022-11-18 18:56:49,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:49,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801233414] [2022-11-18 18:56:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:49,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:49,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:49,860 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:49,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (169)] Waiting until timeout for monitored process [2022-11-18 18:56:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:50,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:56:50,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:50,438 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:56:50,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:56:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:56:50,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:56:51,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:51,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801233414] [2022-11-18 18:56:51,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801233414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:51,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:51,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:56:51,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216171253] [2022-11-18 18:56:51,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:51,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:56:51,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:51,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:56:51,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:56:51,595 INFO L87 Difference]: Start difference. First operand 13462 states and 66090 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:52,267 INFO L93 Difference]: Finished difference Result 14271 states and 69960 transitions. [2022-11-18 18:56:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:56:52,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:56:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:52,327 INFO L225 Difference]: With dead ends: 14271 [2022-11-18 18:56:52,327 INFO L226 Difference]: Without dead ends: 14271 [2022-11-18 18:56:52,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:56:52,327 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:52,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 29 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 64 Unchecked, 0.5s Time] [2022-11-18 18:56:52,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14271 states. [2022-11-18 18:56:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14271 to 13465. [2022-11-18 18:56:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13465 states, 13460 states have (on average 4.910921248142645) internal successors, (66101), 13464 states have internal predecessors, (66101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13465 states to 13465 states and 66101 transitions. [2022-11-18 18:56:52,683 INFO L78 Accepts]: Start accepts. Automaton has 13465 states and 66101 transitions. Word has length 15 [2022-11-18 18:56:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:52,683 INFO L495 AbstractCegarLoop]: Abstraction has 13465 states and 66101 transitions. [2022-11-18 18:56:52,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:52,684 INFO L276 IsEmpty]: Start isEmpty. Operand 13465 states and 66101 transitions. [2022-11-18 18:56:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:56:52,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:52,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:52,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (169)] Ended with exit code 0 [2022-11-18 18:56:52,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:52,895 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:56:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:52,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1803225090, now seen corresponding path program 1 times [2022-11-18 18:56:52,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:52,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816702520] [2022-11-18 18:56:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:52,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:52,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:52,897 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:52,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Waiting until timeout for monitored process [2022-11-18 18:56:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:53,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:56:53,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:53,552 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:56:53,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:56:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:56:54,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:56:54,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:54,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816702520] [2022-11-18 18:56:54,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816702520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:54,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:54,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:56:54,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975336674] [2022-11-18 18:56:54,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:54,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:56:54,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:56:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:56:54,759 INFO L87 Difference]: Start difference. First operand 13465 states and 66101 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:55,544 INFO L93 Difference]: Finished difference Result 14441 states and 70569 transitions. [2022-11-18 18:56:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:56:55,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:56:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:55,610 INFO L225 Difference]: With dead ends: 14441 [2022-11-18 18:56:55,610 INFO L226 Difference]: Without dead ends: 14441 [2022-11-18 18:56:55,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:56:55,610 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:55,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 32 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 190 Unchecked, 0.6s Time] [2022-11-18 18:56:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14441 states. [2022-11-18 18:56:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14441 to 13462. [2022-11-18 18:56:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13462 states, 13457 states have (on average 4.9111986326818755) internal successors, (66090), 13461 states have internal predecessors, (66090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13462 states to 13462 states and 66090 transitions. [2022-11-18 18:56:55,975 INFO L78 Accepts]: Start accepts. Automaton has 13462 states and 66090 transitions. Word has length 15 [2022-11-18 18:56:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:55,975 INFO L495 AbstractCegarLoop]: Abstraction has 13462 states and 66090 transitions. [2022-11-18 18:56:55,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 13462 states and 66090 transitions. [2022-11-18 18:56:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:56:55,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:55,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:55,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Ended with exit code 0 [2022-11-18 18:56:56,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:56,181 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:56:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:56,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1769127849, now seen corresponding path program 2 times [2022-11-18 18:56:56,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:56,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255543920] [2022-11-18 18:56:56,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:56:56,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:56,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:56,183 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:56,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (171)] Waiting until timeout for monitored process [2022-11-18 18:56:56,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:56:56,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:56:56,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:56:56,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:56,846 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:56:56,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:56:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:56:57,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:56:58,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:58,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255543920] [2022-11-18 18:56:58,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255543920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:58,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:58,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:56:58,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818874959] [2022-11-18 18:56:58,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:58,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:56:58,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:58,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:56:58,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:56:58,012 INFO L87 Difference]: Start difference. First operand 13462 states and 66090 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:58,729 INFO L93 Difference]: Finished difference Result 14023 states and 68695 transitions. [2022-11-18 18:56:58,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:56:58,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:56:58,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:58,791 INFO L225 Difference]: With dead ends: 14023 [2022-11-18 18:56:58,791 INFO L226 Difference]: Without dead ends: 14023 [2022-11-18 18:56:58,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:56:58,792 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:58,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-11-18 18:56:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14023 states. [2022-11-18 18:56:59,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14023 to 13467. [2022-11-18 18:56:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13467 states, 13462 states have (on average 4.910860199078889) internal successors, (66110), 13466 states have internal predecessors, (66110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:59,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13467 states to 13467 states and 66110 transitions. [2022-11-18 18:56:59,163 INFO L78 Accepts]: Start accepts. Automaton has 13467 states and 66110 transitions. Word has length 15 [2022-11-18 18:56:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:59,163 INFO L495 AbstractCegarLoop]: Abstraction has 13467 states and 66110 transitions. [2022-11-18 18:56:59,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 13467 states and 66110 transitions. [2022-11-18 18:56:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:56:59,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:59,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:59,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (171)] Forceful destruction successful, exit code 0 [2022-11-18 18:56:59,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:59,370 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:56:59,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1773328380, now seen corresponding path program 2 times [2022-11-18 18:56:59,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:59,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094008639] [2022-11-18 18:56:59,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:56:59,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:59,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:59,372 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:59,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Waiting until timeout for monitored process [2022-11-18 18:56:59,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:56:59,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:56:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:56:59,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:59,960 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:56:59,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:57:00,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:57:01,180 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:01,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094008639] [2022-11-18 18:57:01,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094008639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:01,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:01,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:01,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696448806] [2022-11-18 18:57:01,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:01,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:01,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:01,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:01,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:01,182 INFO L87 Difference]: Start difference. First operand 13467 states and 66110 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:01,806 INFO L93 Difference]: Finished difference Result 13998 states and 68783 transitions. [2022-11-18 18:57:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:57:01,809 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:01,868 INFO L225 Difference]: With dead ends: 13998 [2022-11-18 18:57:01,868 INFO L226 Difference]: Without dead ends: 13998 [2022-11-18 18:57:01,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:01,869 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:01,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2022-11-18 18:57:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13998 states. [2022-11-18 18:57:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13998 to 13471. [2022-11-18 18:57:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13471 states, 13466 states have (on average 4.910589633150156) internal successors, (66126), 13470 states have internal predecessors, (66126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13471 states to 13471 states and 66126 transitions. [2022-11-18 18:57:02,230 INFO L78 Accepts]: Start accepts. Automaton has 13471 states and 66126 transitions. Word has length 15 [2022-11-18 18:57:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:02,230 INFO L495 AbstractCegarLoop]: Abstraction has 13471 states and 66126 transitions. [2022-11-18 18:57:02,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 13471 states and 66126 transitions. [2022-11-18 18:57:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:02,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:02,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:02,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:02,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:02,439 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:02,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1773596499, now seen corresponding path program 3 times [2022-11-18 18:57:02,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:02,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990855675] [2022-11-18 18:57:02,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:57:02,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:02,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:02,441 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:02,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Waiting until timeout for monitored process [2022-11-18 18:57:02,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:57:02,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:02,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:02,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:03,104 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:03,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:57:03,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:57:04,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:04,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990855675] [2022-11-18 18:57:04,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990855675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:04,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:04,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:04,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528574491] [2022-11-18 18:57:04,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:04,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:04,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:04,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:04,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:04,326 INFO L87 Difference]: Start difference. First operand 13471 states and 66126 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:04,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:04,951 INFO L93 Difference]: Finished difference Result 14015 states and 68659 transitions. [2022-11-18 18:57:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:57:04,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:04,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:05,014 INFO L225 Difference]: With dead ends: 14015 [2022-11-18 18:57:05,014 INFO L226 Difference]: Without dead ends: 14015 [2022-11-18 18:57:05,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:05,014 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:05,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-11-18 18:57:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14015 states. [2022-11-18 18:57:05,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14015 to 13478. [2022-11-18 18:57:05,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13478 states, 13473 states have (on average 4.910116529355006) internal successors, (66154), 13477 states have internal predecessors, (66154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:05,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13478 states to 13478 states and 66154 transitions. [2022-11-18 18:57:05,386 INFO L78 Accepts]: Start accepts. Automaton has 13478 states and 66154 transitions. Word has length 15 [2022-11-18 18:57:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:05,387 INFO L495 AbstractCegarLoop]: Abstraction has 13478 states and 66154 transitions. [2022-11-18 18:57:05,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:05,387 INFO L276 IsEmpty]: Start isEmpty. Operand 13478 states and 66154 transitions. [2022-11-18 18:57:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:05,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:05,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:05,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Ended with exit code 0 [2022-11-18 18:57:05,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:05,593 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:05,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1773580689, now seen corresponding path program 4 times [2022-11-18 18:57:05,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:05,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593663854] [2022-11-18 18:57:05,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:57:05,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:05,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:05,595 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:05,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Waiting until timeout for monitored process [2022-11-18 18:57:06,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:57:06,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:06,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:06,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:06,255 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:06,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:57:06,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:57:07,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:07,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593663854] [2022-11-18 18:57:07,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593663854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:07,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:07,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:07,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917009642] [2022-11-18 18:57:07,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:07,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:07,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:07,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:07,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:07,385 INFO L87 Difference]: Start difference. First operand 13478 states and 66154 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:07,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:07,651 INFO L93 Difference]: Finished difference Result 13833 states and 67831 transitions. [2022-11-18 18:57:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:57:07,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:07,715 INFO L225 Difference]: With dead ends: 13833 [2022-11-18 18:57:07,715 INFO L226 Difference]: Without dead ends: 13833 [2022-11-18 18:57:07,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:07,715 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:07,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-11-18 18:57:07,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13833 states. [2022-11-18 18:57:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13833 to 13479. [2022-11-18 18:57:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13474 states have (on average 4.910048983226956) internal successors, (66158), 13478 states have internal predecessors, (66158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 66158 transitions. [2022-11-18 18:57:08,069 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 66158 transitions. Word has length 15 [2022-11-18 18:57:08,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:08,069 INFO L495 AbstractCegarLoop]: Abstraction has 13479 states and 66158 transitions. [2022-11-18 18:57:08,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 66158 transitions. [2022-11-18 18:57:08,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:08,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:08,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:08,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Ended with exit code 0 [2022-11-18 18:57:08,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:08,275 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:08,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:08,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1773585060, now seen corresponding path program 3 times [2022-11-18 18:57:08,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:08,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234922498] [2022-11-18 18:57:08,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:57:08,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:08,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:08,277 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:08,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Waiting until timeout for monitored process [2022-11-18 18:57:08,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:57:08,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:08,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:08,898 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:08,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:57:09,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:57:10,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234922498] [2022-11-18 18:57:10,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234922498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:10,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:10,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:10,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510813868] [2022-11-18 18:57:10,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:10,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:10,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:10,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:10,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:10,107 INFO L87 Difference]: Start difference. First operand 13479 states and 66158 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:10,860 INFO L93 Difference]: Finished difference Result 14253 states and 70111 transitions. [2022-11-18 18:57:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:57:10,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:10,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:10,920 INFO L225 Difference]: With dead ends: 14253 [2022-11-18 18:57:10,920 INFO L226 Difference]: Without dead ends: 14253 [2022-11-18 18:57:10,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:10,921 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:10,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 20 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 46 Unchecked, 0.6s Time] [2022-11-18 18:57:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14253 states. [2022-11-18 18:57:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14253 to 13523. [2022-11-18 18:57:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13523 states, 13518 states have (on average 4.9135966859002815) internal successors, (66422), 13522 states have internal predecessors, (66422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13523 states to 13523 states and 66422 transitions. [2022-11-18 18:57:11,412 INFO L78 Accepts]: Start accepts. Automaton has 13523 states and 66422 transitions. Word has length 15 [2022-11-18 18:57:11,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:11,413 INFO L495 AbstractCegarLoop]: Abstraction has 13523 states and 66422 transitions. [2022-11-18 18:57:11,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 13523 states and 66422 transitions. [2022-11-18 18:57:11,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:11,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:11,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:11,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Ended with exit code 0 [2022-11-18 18:57:11,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:11,619 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:11,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1773732000, now seen corresponding path program 4 times [2022-11-18 18:57:11,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:11,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996670508] [2022-11-18 18:57:11,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:57:11,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:11,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:11,622 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:11,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Waiting until timeout for monitored process [2022-11-18 18:57:12,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:57:12,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:12,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:12,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:12,261 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:12,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:57:12,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:57:13,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:13,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996670508] [2022-11-18 18:57:13,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996670508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:13,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:13,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:13,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410861251] [2022-11-18 18:57:13,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:13,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:13,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:13,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:13,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:13,384 INFO L87 Difference]: Start difference. First operand 13523 states and 66422 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:14,019 INFO L93 Difference]: Finished difference Result 14160 states and 69683 transitions. [2022-11-18 18:57:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:57:14,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:14,082 INFO L225 Difference]: With dead ends: 14160 [2022-11-18 18:57:14,082 INFO L226 Difference]: Without dead ends: 14160 [2022-11-18 18:57:14,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:14,082 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:14,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 20 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 73 Unchecked, 0.5s Time] [2022-11-18 18:57:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14160 states. [2022-11-18 18:57:14,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14160 to 13526. [2022-11-18 18:57:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13526 states, 13521 states have (on average 4.913541897788625) internal successors, (66436), 13525 states have internal predecessors, (66436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:14,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13526 states to 13526 states and 66436 transitions. [2022-11-18 18:57:14,436 INFO L78 Accepts]: Start accepts. Automaton has 13526 states and 66436 transitions. Word has length 15 [2022-11-18 18:57:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:14,436 INFO L495 AbstractCegarLoop]: Abstraction has 13526 states and 66436 transitions. [2022-11-18 18:57:14,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 13526 states and 66436 transitions. [2022-11-18 18:57:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:14,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:14,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:14,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:14,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:14,642 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:14,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1243704989, now seen corresponding path program 5 times [2022-11-18 18:57:14,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:14,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139964674] [2022-11-18 18:57:14,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:57:14,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:14,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:14,644 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:14,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Waiting until timeout for monitored process [2022-11-18 18:57:15,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:57:15,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:57:15,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:15,377 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:15,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:57:15,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:57:16,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:16,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139964674] [2022-11-18 18:57:16,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139964674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:16,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:16,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:57:16,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949687325] [2022-11-18 18:57:16,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:16,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:57:16,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:16,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:57:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:57:16,898 INFO L87 Difference]: Start difference. First operand 13526 states and 66436 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:17,693 INFO L93 Difference]: Finished difference Result 14270 states and 70054 transitions. [2022-11-18 18:57:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:57:17,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:17,756 INFO L225 Difference]: With dead ends: 14270 [2022-11-18 18:57:17,756 INFO L226 Difference]: Without dead ends: 14270 [2022-11-18 18:57:17,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:57:17,757 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:17,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 40 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 81 Unchecked, 0.6s Time] [2022-11-18 18:57:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14270 states. [2022-11-18 18:57:18,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14270 to 13528. [2022-11-18 18:57:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13528 states, 13523 states have (on average 4.913406788434519) internal successors, (66444), 13527 states have internal predecessors, (66444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 66444 transitions. [2022-11-18 18:57:18,119 INFO L78 Accepts]: Start accepts. Automaton has 13528 states and 66444 transitions. Word has length 15 [2022-11-18 18:57:18,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:18,119 INFO L495 AbstractCegarLoop]: Abstraction has 13528 states and 66444 transitions. [2022-11-18 18:57:18,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand 13528 states and 66444 transitions. [2022-11-18 18:57:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:18,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:18,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:18,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Ended with exit code 0 [2022-11-18 18:57:18,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:18,325 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:18,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1239504458, now seen corresponding path program 5 times [2022-11-18 18:57:18,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:18,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444109810] [2022-11-18 18:57:18,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:57:18,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:18,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:18,327 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:18,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Waiting until timeout for monitored process [2022-11-18 18:57:18,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:57:18,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:18,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:57:18,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:19,019 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:19,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:57:19,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:57:20,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:20,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444109810] [2022-11-18 18:57:20,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444109810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:20,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:20,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:57:20,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133820609] [2022-11-18 18:57:20,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:20,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:57:20,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:20,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:57:20,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:57:20,450 INFO L87 Difference]: Start difference. First operand 13528 states and 66444 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:21,106 INFO L93 Difference]: Finished difference Result 13825 states and 67950 transitions. [2022-11-18 18:57:21,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:57:21,107 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:21,167 INFO L225 Difference]: With dead ends: 13825 [2022-11-18 18:57:21,167 INFO L226 Difference]: Without dead ends: 13825 [2022-11-18 18:57:21,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:57:21,167 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:21,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2022-11-18 18:57:21,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2022-11-18 18:57:21,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 13528. [2022-11-18 18:57:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13528 states, 13523 states have (on average 4.913406788434519) internal successors, (66444), 13527 states have internal predecessors, (66444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 66444 transitions. [2022-11-18 18:57:21,538 INFO L78 Accepts]: Start accepts. Automaton has 13528 states and 66444 transitions. Word has length 15 [2022-11-18 18:57:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:21,538 INFO L495 AbstractCegarLoop]: Abstraction has 13528 states and 66444 transitions. [2022-11-18 18:57:21,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:21,539 INFO L276 IsEmpty]: Start isEmpty. Operand 13528 states and 66444 transitions. [2022-11-18 18:57:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:21,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:21,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:21,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Ended with exit code 0 [2022-11-18 18:57:21,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:21,745 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1998186975, now seen corresponding path program 1 times [2022-11-18 18:57:21,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:21,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864706897] [2022-11-18 18:57:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:21,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:21,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:21,747 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:21,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Waiting until timeout for monitored process [2022-11-18 18:57:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:22,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:22,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:22,413 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:22,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:22,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:23,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:23,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864706897] [2022-11-18 18:57:23,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864706897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:23,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:23,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:23,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153217706] [2022-11-18 18:57:23,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:23,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:23,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:23,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:23,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:23,597 INFO L87 Difference]: Start difference. First operand 13528 states and 66444 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:24,160 INFO L93 Difference]: Finished difference Result 14272 states and 70131 transitions. [2022-11-18 18:57:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:57:24,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:24,225 INFO L225 Difference]: With dead ends: 14272 [2022-11-18 18:57:24,225 INFO L226 Difference]: Without dead ends: 14272 [2022-11-18 18:57:24,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:24,226 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:24,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 15 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-11-18 18:57:24,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14272 states. [2022-11-18 18:57:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14272 to 13530. [2022-11-18 18:57:24,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13530 states, 13525 states have (on average 4.913271719038817) internal successors, (66452), 13529 states have internal predecessors, (66452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13530 states to 13530 states and 66452 transitions. [2022-11-18 18:57:24,794 INFO L78 Accepts]: Start accepts. Automaton has 13530 states and 66452 transitions. Word has length 15 [2022-11-18 18:57:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:24,795 INFO L495 AbstractCegarLoop]: Abstraction has 13530 states and 66452 transitions. [2022-11-18 18:57:24,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 13530 states and 66452 transitions. [2022-11-18 18:57:24,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:24,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:24,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:24,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Ended with exit code 0 [2022-11-18 18:57:25,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:25,001 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:25,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:25,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1998443655, now seen corresponding path program 2 times [2022-11-18 18:57:25,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:25,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759639150] [2022-11-18 18:57:25,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:57:25,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:25,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:25,004 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:25,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Waiting until timeout for monitored process [2022-11-18 18:57:25,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:57:25,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:25,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:25,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:25,645 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:25,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:26,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:26,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:26,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759639150] [2022-11-18 18:57:26,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759639150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:26,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:26,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:26,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661705795] [2022-11-18 18:57:26,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:26,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:26,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:26,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:26,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:26,828 INFO L87 Difference]: Start difference. First operand 13530 states and 66452 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:27,477 INFO L93 Difference]: Finished difference Result 14777 states and 72502 transitions. [2022-11-18 18:57:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:57:27,479 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:27,540 INFO L225 Difference]: With dead ends: 14777 [2022-11-18 18:57:27,540 INFO L226 Difference]: Without dead ends: 14777 [2022-11-18 18:57:27,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:27,540 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:27,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 20 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 69 Unchecked, 0.5s Time] [2022-11-18 18:57:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14777 states. [2022-11-18 18:57:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14777 to 13553. [2022-11-18 18:57:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13553 states, 13548 states have (on average 4.913049896663714) internal successors, (66562), 13552 states have internal predecessors, (66562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:27,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13553 states to 13553 states and 66562 transitions. [2022-11-18 18:57:27,921 INFO L78 Accepts]: Start accepts. Automaton has 13553 states and 66562 transitions. Word has length 15 [2022-11-18 18:57:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:27,922 INFO L495 AbstractCegarLoop]: Abstraction has 13553 states and 66562 transitions. [2022-11-18 18:57:27,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand 13553 states and 66562 transitions. [2022-11-18 18:57:27,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:27,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:27,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:27,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:28,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:28,128 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:28,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1998439067, now seen corresponding path program 6 times [2022-11-18 18:57:28,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:28,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758714582] [2022-11-18 18:57:28,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:57:28,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:28,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:28,130 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:28,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Waiting until timeout for monitored process [2022-11-18 18:57:28,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:57:28,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:28,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:28,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:28,914 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:28,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:29,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:30,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:30,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758714582] [2022-11-18 18:57:30,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758714582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:30,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:30,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:30,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463056292] [2022-11-18 18:57:30,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:30,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:30,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:30,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:30,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:30,148 INFO L87 Difference]: Start difference. First operand 13553 states and 66562 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:30,711 INFO L93 Difference]: Finished difference Result 14071 states and 68976 transitions. [2022-11-18 18:57:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:57:30,713 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:30,769 INFO L225 Difference]: With dead ends: 14071 [2022-11-18 18:57:30,769 INFO L226 Difference]: Without dead ends: 14071 [2022-11-18 18:57:30,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:30,769 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:30,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 17 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-11-18 18:57:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14071 states. [2022-11-18 18:57:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14071 to 13589. [2022-11-18 18:57:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13589 states, 13584 states have (on average 4.913280329799765) internal successors, (66742), 13588 states have internal predecessors, (66742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13589 states to 13589 states and 66742 transitions. [2022-11-18 18:57:31,120 INFO L78 Accepts]: Start accepts. Automaton has 13589 states and 66742 transitions. Word has length 15 [2022-11-18 18:57:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:31,120 INFO L495 AbstractCegarLoop]: Abstraction has 13589 states and 66742 transitions. [2022-11-18 18:57:31,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:31,120 INFO L276 IsEmpty]: Start isEmpty. Operand 13589 states and 66742 transitions. [2022-11-18 18:57:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:31,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:31,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:31,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:31,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:31,326 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:31,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1998590595, now seen corresponding path program 3 times [2022-11-18 18:57:31,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:31,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552078049] [2022-11-18 18:57:31,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:57:31,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:31,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:31,333 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:31,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Waiting until timeout for monitored process [2022-11-18 18:57:31,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:57:31,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:31,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:32,070 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:32,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:32,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:33,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:33,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552078049] [2022-11-18 18:57:33,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552078049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:33,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:33,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:33,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094125554] [2022-11-18 18:57:33,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:33,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:33,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:33,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:33,267 INFO L87 Difference]: Start difference. First operand 13589 states and 66742 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:33,883 INFO L93 Difference]: Finished difference Result 15331 states and 75266 transitions. [2022-11-18 18:57:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:57:33,885 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:33,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:33,950 INFO L225 Difference]: With dead ends: 15331 [2022-11-18 18:57:33,950 INFO L226 Difference]: Without dead ends: 15331 [2022-11-18 18:57:33,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:33,950 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:33,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 23 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2022-11-18 18:57:33,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15331 states. [2022-11-18 18:57:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15331 to 13660. [2022-11-18 18:57:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13660 states, 13655 states have (on average 4.918564628341267) internal successors, (67163), 13659 states have internal predecessors, (67163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13660 states to 13660 states and 67163 transitions. [2022-11-18 18:57:34,444 INFO L78 Accepts]: Start accepts. Automaton has 13660 states and 67163 transitions. Word has length 15 [2022-11-18 18:57:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:34,444 INFO L495 AbstractCegarLoop]: Abstraction has 13660 states and 67163 transitions. [2022-11-18 18:57:34,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:34,445 INFO L276 IsEmpty]: Start isEmpty. Operand 13660 states and 67163 transitions. [2022-11-18 18:57:34,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:34,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:34,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:34,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Ended with exit code 0 [2022-11-18 18:57:34,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:34,651 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:34,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:34,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1998448367, now seen corresponding path program 7 times [2022-11-18 18:57:34,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:34,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857116950] [2022-11-18 18:57:34,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:57:34,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:34,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:34,653 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:34,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Waiting until timeout for monitored process [2022-11-18 18:57:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:35,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:35,249 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:35,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:35,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:36,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:36,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857116950] [2022-11-18 18:57:36,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857116950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:36,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:36,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:36,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565742947] [2022-11-18 18:57:36,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:36,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:36,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:36,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:36,303 INFO L87 Difference]: Start difference. First operand 13660 states and 67163 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:36,614 INFO L93 Difference]: Finished difference Result 14076 states and 69109 transitions. [2022-11-18 18:57:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:57:36,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:36,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:36,680 INFO L225 Difference]: With dead ends: 14076 [2022-11-18 18:57:36,680 INFO L226 Difference]: Without dead ends: 14076 [2022-11-18 18:57:36,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:36,681 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:36,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-18 18:57:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14076 states. [2022-11-18 18:57:36,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14076 to 13660. [2022-11-18 18:57:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13660 states, 13655 states have (on average 4.918564628341267) internal successors, (67163), 13659 states have internal predecessors, (67163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:37,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13660 states to 13660 states and 67163 transitions. [2022-11-18 18:57:37,303 INFO L78 Accepts]: Start accepts. Automaton has 13660 states and 67163 transitions. Word has length 15 [2022-11-18 18:57:37,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:37,303 INFO L495 AbstractCegarLoop]: Abstraction has 13660 states and 67163 transitions. [2022-11-18 18:57:37,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 13660 states and 67163 transitions. [2022-11-18 18:57:37,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:37,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:37,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:37,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:37,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:37,511 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:37,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:37,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2128671555, now seen corresponding path program 4 times [2022-11-18 18:57:37,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:37,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309468484] [2022-11-18 18:57:37,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:57:37,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:37,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:37,513 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:37,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Waiting until timeout for monitored process [2022-11-18 18:57:37,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:57:37,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:37,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:37,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:38,114 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:38,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:38,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:39,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:39,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309468484] [2022-11-18 18:57:39,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309468484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:39,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:39,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:39,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674376990] [2022-11-18 18:57:39,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:39,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:39,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:39,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:39,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:39,243 INFO L87 Difference]: Start difference. First operand 13660 states and 67163 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:39,774 INFO L93 Difference]: Finished difference Result 14282 states and 70270 transitions. [2022-11-18 18:57:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:57:39,776 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:39,838 INFO L225 Difference]: With dead ends: 14282 [2022-11-18 18:57:39,838 INFO L226 Difference]: Without dead ends: 14282 [2022-11-18 18:57:39,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:39,838 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:39,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2022-11-18 18:57:39,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14282 states. [2022-11-18 18:57:40,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14282 to 13661. [2022-11-18 18:57:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13661 states, 13656 states have (on average 4.918570591681312) internal successors, (67168), 13660 states have internal predecessors, (67168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13661 states to 13661 states and 67168 transitions. [2022-11-18 18:57:40,330 INFO L78 Accepts]: Start accepts. Automaton has 13661 states and 67168 transitions. Word has length 15 [2022-11-18 18:57:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:40,331 INFO L495 AbstractCegarLoop]: Abstraction has 13661 states and 67168 transitions. [2022-11-18 18:57:40,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 13661 states and 67168 transitions. [2022-11-18 18:57:40,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:40,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:40,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:40,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:40,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:40,553 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2128655745, now seen corresponding path program 5 times [2022-11-18 18:57:40,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:40,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322135085] [2022-11-18 18:57:40,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:57:40,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:40,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:40,555 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:40,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Waiting until timeout for monitored process [2022-11-18 18:57:41,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:57:41,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:41,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:57:41,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:41,487 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:41,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:57:41,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:57:42,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:42,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322135085] [2022-11-18 18:57:42,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322135085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:42,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:42,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:57:42,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964696070] [2022-11-18 18:57:42,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:42,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:57:42,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:42,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:57:42,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:57:42,904 INFO L87 Difference]: Start difference. First operand 13661 states and 67168 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:43,641 INFO L93 Difference]: Finished difference Result 14173 states and 69780 transitions. [2022-11-18 18:57:43,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:57:43,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:43,702 INFO L225 Difference]: With dead ends: 14173 [2022-11-18 18:57:43,702 INFO L226 Difference]: Without dead ends: 14173 [2022-11-18 18:57:43,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:57:43,702 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:43,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 23 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2022-11-18 18:57:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14173 states. [2022-11-18 18:57:43,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14173 to 13662. [2022-11-18 18:57:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13662 states, 13657 states have (on average 4.918576554148056) internal successors, (67173), 13661 states have internal predecessors, (67173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13662 states to 13662 states and 67173 transitions. [2022-11-18 18:57:44,060 INFO L78 Accepts]: Start accepts. Automaton has 13662 states and 67173 transitions. Word has length 15 [2022-11-18 18:57:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:44,061 INFO L495 AbstractCegarLoop]: Abstraction has 13662 states and 67173 transitions. [2022-11-18 18:57:44,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 13662 states and 67173 transitions. [2022-11-18 18:57:44,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:44,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:44,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:44,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Ended with exit code 0 [2022-11-18 18:57:44,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:44,267 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:44,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2128655528, now seen corresponding path program 6 times [2022-11-18 18:57:44,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:44,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658962652] [2022-11-18 18:57:44,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:57:44,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:44,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:44,269 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:44,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Waiting until timeout for monitored process [2022-11-18 18:57:44,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:57:44,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:44,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:44,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:44,963 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:44,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:45,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:46,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:46,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658962652] [2022-11-18 18:57:46,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658962652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:46,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:46,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:46,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307950940] [2022-11-18 18:57:46,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:46,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:46,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:46,154 INFO L87 Difference]: Start difference. First operand 13662 states and 67173 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:46,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:46,887 INFO L93 Difference]: Finished difference Result 14137 states and 69594 transitions. [2022-11-18 18:57:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:57:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:46,947 INFO L225 Difference]: With dead ends: 14137 [2022-11-18 18:57:46,947 INFO L226 Difference]: Without dead ends: 14137 [2022-11-18 18:57:46,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:46,948 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:46,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 16 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 28 Unchecked, 0.4s Time] [2022-11-18 18:57:46,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14137 states. [2022-11-18 18:57:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14137 to 13644. [2022-11-18 18:57:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13644 states, 13639 states have (on average 4.917149351125449) internal successors, (67065), 13643 states have internal predecessors, (67065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13644 states to 13644 states and 67065 transitions. [2022-11-18 18:57:47,587 INFO L78 Accepts]: Start accepts. Automaton has 13644 states and 67065 transitions. Word has length 15 [2022-11-18 18:57:47,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:47,588 INFO L495 AbstractCegarLoop]: Abstraction has 13644 states and 67065 transitions. [2022-11-18 18:57:47,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:47,588 INFO L276 IsEmpty]: Start isEmpty. Operand 13644 states and 67065 transitions. [2022-11-18 18:57:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:47,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:47,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:47,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:47,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:47,811 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:47,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:47,811 INFO L85 PathProgramCache]: Analyzing trace with hash -2128655001, now seen corresponding path program 1 times [2022-11-18 18:57:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:47,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514922180] [2022-11-18 18:57:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:47,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:47,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:47,813 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:47,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Waiting until timeout for monitored process [2022-11-18 18:57:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:48,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:48,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:48,494 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:48,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:48,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:49,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:49,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514922180] [2022-11-18 18:57:49,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514922180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:49,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:49,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:49,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930314142] [2022-11-18 18:57:49,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:49,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:49,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:49,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:49,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:49,622 INFO L87 Difference]: Start difference. First operand 13644 states and 67065 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:50,319 INFO L93 Difference]: Finished difference Result 14186 states and 69993 transitions. [2022-11-18 18:57:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:57:50,321 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:50,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:50,382 INFO L225 Difference]: With dead ends: 14186 [2022-11-18 18:57:50,382 INFO L226 Difference]: Without dead ends: 14186 [2022-11-18 18:57:50,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:50,383 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:50,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 17 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 33 Unchecked, 0.4s Time] [2022-11-18 18:57:50,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14186 states. [2022-11-18 18:57:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14186 to 13644. [2022-11-18 18:57:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13644 states, 13639 states have (on average 4.917149351125449) internal successors, (67065), 13643 states have internal predecessors, (67065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:50,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13644 states to 13644 states and 67065 transitions. [2022-11-18 18:57:50,968 INFO L78 Accepts]: Start accepts. Automaton has 13644 states and 67065 transitions. Word has length 15 [2022-11-18 18:57:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:50,968 INFO L495 AbstractCegarLoop]: Abstraction has 13644 states and 67065 transitions. [2022-11-18 18:57:50,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 13644 states and 67065 transitions. [2022-11-18 18:57:50,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:50,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:50,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:50,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:51,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:51,175 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:51,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:51,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2128664828, now seen corresponding path program 7 times [2022-11-18 18:57:51,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:51,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729419054] [2022-11-18 18:57:51,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:57:51,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:51,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:51,177 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:51,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Waiting until timeout for monitored process [2022-11-18 18:57:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:51,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:51,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:51,836 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:51,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:52,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:52,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:52,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729419054] [2022-11-18 18:57:52,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729419054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:52,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:52,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:52,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908890619] [2022-11-18 18:57:52,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:52,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:52,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:52,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:52,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:52,992 INFO L87 Difference]: Start difference. First operand 13644 states and 67065 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:53,664 INFO L93 Difference]: Finished difference Result 14073 states and 69257 transitions. [2022-11-18 18:57:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:57:53,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:53,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:53,726 INFO L225 Difference]: With dead ends: 14073 [2022-11-18 18:57:53,726 INFO L226 Difference]: Without dead ends: 14073 [2022-11-18 18:57:53,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:53,726 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:53,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-18 18:57:53,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14073 states. [2022-11-18 18:57:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14073 to 13644. [2022-11-18 18:57:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13644 states, 13639 states have (on average 4.917149351125449) internal successors, (67065), 13643 states have internal predecessors, (67065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13644 states to 13644 states and 67065 transitions. [2022-11-18 18:57:54,169 INFO L78 Accepts]: Start accepts. Automaton has 13644 states and 67065 transitions. Word has length 15 [2022-11-18 18:57:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:54,170 INFO L495 AbstractCegarLoop]: Abstraction has 13644 states and 67065 transitions. [2022-11-18 18:57:54,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 13644 states and 67065 transitions. [2022-11-18 18:57:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:54,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:54,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:54,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:54,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:54,514 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:54,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:54,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2128648491, now seen corresponding path program 2 times [2022-11-18 18:57:54,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:54,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244638852] [2022-11-18 18:57:54,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:57:54,515 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:54,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:54,516 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:54,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Waiting until timeout for monitored process [2022-11-18 18:57:55,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:57:55,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:55,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:55,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:55,221 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:55,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:55,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:56,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:56,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244638852] [2022-11-18 18:57:56,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244638852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:56,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:56,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:56,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55092974] [2022-11-18 18:57:56,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:56,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:56,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:56,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:56,405 INFO L87 Difference]: Start difference. First operand 13644 states and 67065 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:57,152 INFO L93 Difference]: Finished difference Result 14356 states and 70974 transitions. [2022-11-18 18:57:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:57:57,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:57:57,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:57,216 INFO L225 Difference]: With dead ends: 14356 [2022-11-18 18:57:57,216 INFO L226 Difference]: Without dead ends: 14356 [2022-11-18 18:57:57,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:57,216 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:57,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2022-11-18 18:57:57,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14356 states. [2022-11-18 18:57:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14356 to 13749. [2022-11-18 18:57:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13749 states, 13744 states have (on average 4.928696158323632) internal successors, (67740), 13748 states have internal predecessors, (67740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13749 states to 13749 states and 67740 transitions. [2022-11-18 18:57:57,676 INFO L78 Accepts]: Start accepts. Automaton has 13749 states and 67740 transitions. Word has length 15 [2022-11-18 18:57:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:57,676 INFO L495 AbstractCegarLoop]: Abstraction has 13749 states and 67740 transitions. [2022-11-18 18:57:57,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 13749 states and 67740 transitions. [2022-11-18 18:57:57,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:57:57,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:57,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:57,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:57,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:57,887 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:57:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:57,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2123487921, now seen corresponding path program 3 times [2022-11-18 18:57:57,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:57,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363982042] [2022-11-18 18:57:57,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:57:57,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:57,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:57,889 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:57,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Waiting until timeout for monitored process [2022-11-18 18:57:58,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:57:58,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:58,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:57:58,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:58,589 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:57:58,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:57:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:59,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:57:59,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:59,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363982042] [2022-11-18 18:57:59,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363982042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:59,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:59,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:57:59,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677225707] [2022-11-18 18:57:59,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:59,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:59,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:59,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:59,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:59,865 INFO L87 Difference]: Start difference. First operand 13749 states and 67740 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:00,442 INFO L93 Difference]: Finished difference Result 14444 states and 71757 transitions. [2022-11-18 18:58:00,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:58:00,443 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:00,506 INFO L225 Difference]: With dead ends: 14444 [2022-11-18 18:58:00,506 INFO L226 Difference]: Without dead ends: 14444 [2022-11-18 18:58:00,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:58:00,507 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:00,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 35 Unchecked, 0.4s Time] [2022-11-18 18:58:00,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14444 states. [2022-11-18 18:58:01,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14444 to 13795. [2022-11-18 18:58:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13795 states, 13790 states have (on average 4.934735315445975) internal successors, (68050), 13794 states have internal predecessors, (68050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13795 states to 13795 states and 68050 transitions. [2022-11-18 18:58:01,163 INFO L78 Accepts]: Start accepts. Automaton has 13795 states and 68050 transitions. Word has length 15 [2022-11-18 18:58:01,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:01,163 INFO L495 AbstractCegarLoop]: Abstraction has 13795 states and 68050 transitions. [2022-11-18 18:58:01,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 13795 states and 68050 transitions. [2022-11-18 18:58:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:58:01,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:01,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:01,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:01,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:01,373 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:58:01,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:01,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2136971805, now seen corresponding path program 6 times [2022-11-18 18:58:01,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:01,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80728040] [2022-11-18 18:58:01,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:58:01,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:01,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:01,375 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:01,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Waiting until timeout for monitored process [2022-11-18 18:58:01,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:58:01,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:01,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:58:01,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:02,111 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:58:02,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:58:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:02,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:03,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:03,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80728040] [2022-11-18 18:58:03,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80728040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:03,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:03,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:58:03,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15488824] [2022-11-18 18:58:03,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:03,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:58:03,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:03,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:58:03,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:58:03,457 INFO L87 Difference]: Start difference. First operand 13795 states and 68050 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:04,201 INFO L93 Difference]: Finished difference Result 14857 states and 73218 transitions. [2022-11-18 18:58:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:58:04,203 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:04,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:04,268 INFO L225 Difference]: With dead ends: 14857 [2022-11-18 18:58:04,268 INFO L226 Difference]: Without dead ends: 14857 [2022-11-18 18:58:04,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:58:04,269 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:04,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 27 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 51 Unchecked, 0.6s Time] [2022-11-18 18:58:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14857 states. [2022-11-18 18:58:04,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14857 to 13881. [2022-11-18 18:58:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13881 states, 13876 states have (on average 4.934707408475065) internal successors, (68474), 13880 states have internal predecessors, (68474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13881 states to 13881 states and 68474 transitions. [2022-11-18 18:58:04,796 INFO L78 Accepts]: Start accepts. Automaton has 13881 states and 68474 transitions. Word has length 15 [2022-11-18 18:58:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:04,796 INFO L495 AbstractCegarLoop]: Abstraction has 13881 states and 68474 transitions. [2022-11-18 18:58:04,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 13881 states and 68474 transitions. [2022-11-18 18:58:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:58:04,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:04,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:04,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Ended with exit code 0 [2022-11-18 18:58:05,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:05,003 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:58:05,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:05,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2136967217, now seen corresponding path program 8 times [2022-11-18 18:58:05,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:05,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596643014] [2022-11-18 18:58:05,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:58:05,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:05,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:05,005 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:05,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Waiting until timeout for monitored process [2022-11-18 18:58:05,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:58:05,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:05,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:58:05,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:05,719 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:58:05,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:58:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:06,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:07,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:07,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596643014] [2022-11-18 18:58:07,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596643014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:07,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:07,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:58:07,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072713880] [2022-11-18 18:58:07,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:07,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:58:07,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:07,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:58:07,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:58:07,053 INFO L87 Difference]: Start difference. First operand 13881 states and 68474 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:07,668 INFO L93 Difference]: Finished difference Result 14324 states and 70549 transitions. [2022-11-18 18:58:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:58:07,670 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:07,733 INFO L225 Difference]: With dead ends: 14324 [2022-11-18 18:58:07,733 INFO L226 Difference]: Without dead ends: 14324 [2022-11-18 18:58:07,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:58:07,734 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:07,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-18 18:58:07,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14324 states. [2022-11-18 18:58:08,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14324 to 13884. [2022-11-18 18:58:08,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13884 states, 13879 states have (on average 4.934505367821889) internal successors, (68486), 13883 states have internal predecessors, (68486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13884 states to 13884 states and 68486 transitions. [2022-11-18 18:58:08,345 INFO L78 Accepts]: Start accepts. Automaton has 13884 states and 68486 transitions. Word has length 15 [2022-11-18 18:58:08,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:08,346 INFO L495 AbstractCegarLoop]: Abstraction has 13884 states and 68486 transitions. [2022-11-18 18:58:08,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:08,346 INFO L276 IsEmpty]: Start isEmpty. Operand 13884 states and 68486 transitions. [2022-11-18 18:58:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:58:08,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:08,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:08,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:08,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:08,557 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:58:08,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:08,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2137118745, now seen corresponding path program 7 times [2022-11-18 18:58:08,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:08,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358009050] [2022-11-18 18:58:08,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:58:08,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:08,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:08,560 INFO L229 MonitoredProcess]: Starting monitored process 193 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:08,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Waiting until timeout for monitored process [2022-11-18 18:58:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:58:09,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:58:09,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:09,287 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:58:09,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:58:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:09,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:10,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:10,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358009050] [2022-11-18 18:58:10,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358009050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:10,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:10,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:58:10,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754419209] [2022-11-18 18:58:10,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:10,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:58:10,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:10,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:58:10,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:58:10,524 INFO L87 Difference]: Start difference. First operand 13884 states and 68486 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:11,254 INFO L93 Difference]: Finished difference Result 14792 states and 72957 transitions. [2022-11-18 18:58:11,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:58:11,256 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:11,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:11,338 INFO L225 Difference]: With dead ends: 14792 [2022-11-18 18:58:11,338 INFO L226 Difference]: Without dead ends: 14792 [2022-11-18 18:58:11,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:58:11,338 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:11,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-11-18 18:58:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14792 states. [2022-11-18 18:58:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14792 to 13882. [2022-11-18 18:58:11,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13882 states, 13877 states have (on average 4.934640051884413) internal successors, (68478), 13881 states have internal predecessors, (68478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13882 states to 13882 states and 68478 transitions. [2022-11-18 18:58:11,945 INFO L78 Accepts]: Start accepts. Automaton has 13882 states and 68478 transitions. Word has length 15 [2022-11-18 18:58:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:11,945 INFO L495 AbstractCegarLoop]: Abstraction has 13882 states and 68478 transitions. [2022-11-18 18:58:11,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 13882 states and 68478 transitions. [2022-11-18 18:58:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:58:11,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:11,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:11,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Ended with exit code 0 [2022-11-18 18:58:12,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:12,153 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:58:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:12,154 INFO L85 PathProgramCache]: Analyzing trace with hash -2136976517, now seen corresponding path program 9 times [2022-11-18 18:58:12,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:12,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849082175] [2022-11-18 18:58:12,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:58:12,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:12,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:12,156 INFO L229 MonitoredProcess]: Starting monitored process 194 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:12,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Waiting until timeout for monitored process [2022-11-18 18:58:12,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:58:12,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:12,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:58:12,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:12,886 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:58:12,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:58:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:13,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:14,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:14,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849082175] [2022-11-18 18:58:14,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849082175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:14,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:14,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:58:14,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561534310] [2022-11-18 18:58:14,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:14,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:58:14,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:14,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:58:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:58:14,290 INFO L87 Difference]: Start difference. First operand 13882 states and 68478 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:14,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:14,948 INFO L93 Difference]: Finished difference Result 14355 states and 70662 transitions. [2022-11-18 18:58:14,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:58:14,950 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:14,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:15,015 INFO L225 Difference]: With dead ends: 14355 [2022-11-18 18:58:15,015 INFO L226 Difference]: Without dead ends: 14355 [2022-11-18 18:58:15,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:58:15,015 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:15,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 60 Unchecked, 0.5s Time] [2022-11-18 18:58:15,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2022-11-18 18:58:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 13898. [2022-11-18 18:58:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13898 states, 13893 states have (on average 4.9335636651551145) internal successors, (68542), 13897 states have internal predecessors, (68542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13898 states to 13898 states and 68542 transitions. [2022-11-18 18:58:15,630 INFO L78 Accepts]: Start accepts. Automaton has 13898 states and 68542 transitions. Word has length 15 [2022-11-18 18:58:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:15,631 INFO L495 AbstractCegarLoop]: Abstraction has 13898 states and 68542 transitions. [2022-11-18 18:58:15,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 13898 states and 68542 transitions. [2022-11-18 18:58:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:58:15,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:15,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:15,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:15,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:15,838 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:58:15,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:15,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2136481695, now seen corresponding path program 8 times [2022-11-18 18:58:15,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:15,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854592988] [2022-11-18 18:58:15,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:58:15,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:15,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:15,840 INFO L229 MonitoredProcess]: Starting monitored process 195 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:15,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Waiting until timeout for monitored process [2022-11-18 18:58:16,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:58:16,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:16,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:58:16,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:16,598 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:58:16,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:58:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:17,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:17,849 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:17,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854592988] [2022-11-18 18:58:17,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854592988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:17,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:17,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:58:17,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285905833] [2022-11-18 18:58:17,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:17,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:58:17,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:17,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:58:17,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:58:17,851 INFO L87 Difference]: Start difference. First operand 13898 states and 68542 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:18,538 INFO L93 Difference]: Finished difference Result 15121 states and 74550 transitions. [2022-11-18 18:58:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:58:18,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:18,606 INFO L225 Difference]: With dead ends: 15121 [2022-11-18 18:58:18,606 INFO L226 Difference]: Without dead ends: 15121 [2022-11-18 18:58:18,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:58:18,606 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:18,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 16 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2022-11-18 18:58:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15121 states. [2022-11-18 18:58:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15121 to 13841. [2022-11-18 18:58:19,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13841 states, 13836 states have (on average 4.9335790690951145) internal successors, (68261), 13840 states have internal predecessors, (68261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13841 states to 13841 states and 68261 transitions. [2022-11-18 18:58:19,308 INFO L78 Accepts]: Start accepts. Automaton has 13841 states and 68261 transitions. Word has length 15 [2022-11-18 18:58:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:19,308 INFO L495 AbstractCegarLoop]: Abstraction has 13841 states and 68261 transitions. [2022-11-18 18:58:19,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 13841 states and 68261 transitions. [2022-11-18 18:58:19,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:58:19,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:19,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:19,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Ended with exit code 0 [2022-11-18 18:58:19,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:19,518 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:58:19,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:19,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2136477107, now seen corresponding path program 10 times [2022-11-18 18:58:19,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:19,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890468617] [2022-11-18 18:58:19,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:58:19,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:19,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:19,520 INFO L229 MonitoredProcess]: Starting monitored process 196 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:19,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Waiting until timeout for monitored process [2022-11-18 18:58:20,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:58:20,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:20,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:58:20,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:20,254 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:58:20,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:58:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:20,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:21,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:21,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890468617] [2022-11-18 18:58:21,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890468617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:21,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:21,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:58:21,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996035886] [2022-11-18 18:58:21,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:21,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:58:21,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:21,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:58:21,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:58:21,471 INFO L87 Difference]: Start difference. First operand 13841 states and 68261 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:22,131 INFO L93 Difference]: Finished difference Result 14141 states and 69695 transitions. [2022-11-18 18:58:22,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:58:22,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:22,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:22,404 INFO L225 Difference]: With dead ends: 14141 [2022-11-18 18:58:22,405 INFO L226 Difference]: Without dead ends: 14141 [2022-11-18 18:58:22,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:58:22,405 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:22,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2022-11-18 18:58:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14141 states. [2022-11-18 18:58:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14141 to 13843. [2022-11-18 18:58:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13843 states, 13838 states have (on average 4.9335164041046395) internal successors, (68270), 13842 states have internal predecessors, (68270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:22,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13843 states to 13843 states and 68270 transitions. [2022-11-18 18:58:22,765 INFO L78 Accepts]: Start accepts. Automaton has 13843 states and 68270 transitions. Word has length 15 [2022-11-18 18:58:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:22,765 INFO L495 AbstractCegarLoop]: Abstraction has 13843 states and 68270 transitions. [2022-11-18 18:58:22,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:22,765 INFO L276 IsEmpty]: Start isEmpty. Operand 13843 states and 68270 transitions. [2022-11-18 18:58:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:58:22,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:22,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:22,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Ended with exit code 0 [2022-11-18 18:58:22,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:22,972 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:58:22,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:22,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2136612608, now seen corresponding path program 8 times [2022-11-18 18:58:22,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:22,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490186611] [2022-11-18 18:58:22,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:58:22,973 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:22,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:22,974 INFO L229 MonitoredProcess]: Starting monitored process 197 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:22,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Waiting until timeout for monitored process [2022-11-18 18:58:23,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:58:23,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:23,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:58:23,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:23,626 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:58:23,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:58:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:24,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:25,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:25,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490186611] [2022-11-18 18:58:25,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490186611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:25,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:25,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:58:25,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228148350] [2022-11-18 18:58:25,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:25,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:58:25,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:25,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:58:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:58:25,031 INFO L87 Difference]: Start difference. First operand 13843 states and 68270 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:25,703 INFO L93 Difference]: Finished difference Result 14491 states and 71641 transitions. [2022-11-18 18:58:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:58:25,705 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:25,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:25,769 INFO L225 Difference]: With dead ends: 14491 [2022-11-18 18:58:25,770 INFO L226 Difference]: Without dead ends: 14491 [2022-11-18 18:58:25,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:58:25,770 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:25,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 20 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2022-11-18 18:58:25,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14491 states. [2022-11-18 18:58:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14491 to 13953. [2022-11-18 18:58:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13953 states, 13948 states have (on average 4.941783768282191) internal successors, (68928), 13952 states have internal predecessors, (68928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13953 states to 13953 states and 68928 transitions. [2022-11-18 18:58:26,163 INFO L78 Accepts]: Start accepts. Automaton has 13953 states and 68928 transitions. Word has length 15 [2022-11-18 18:58:26,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:26,163 INFO L495 AbstractCegarLoop]: Abstraction has 13953 states and 68928 transitions. [2022-11-18 18:58:26,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:26,164 INFO L276 IsEmpty]: Start isEmpty. Operand 13953 states and 68928 transitions. [2022-11-18 18:58:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:58:26,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:26,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:26,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Ended with exit code 0 [2022-11-18 18:58:26,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:26,370 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:58:26,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:26,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2141167965, now seen corresponding path program 9 times [2022-11-18 18:58:26,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:26,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904597809] [2022-11-18 18:58:26,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:58:26,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:26,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:26,372 INFO L229 MonitoredProcess]: Starting monitored process 198 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:26,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Waiting until timeout for monitored process [2022-11-18 18:58:27,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:58:27,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:27,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:58:27,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:27,226 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:58:27,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:58:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:27,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:28,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:28,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904597809] [2022-11-18 18:58:28,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904597809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:28,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:28,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:58:28,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349293492] [2022-11-18 18:58:28,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:28,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:58:28,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:28,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:58:28,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:58:28,403 INFO L87 Difference]: Start difference. First operand 13953 states and 68928 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:29,015 INFO L93 Difference]: Finished difference Result 14620 states and 72176 transitions. [2022-11-18 18:58:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:58:29,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:29,077 INFO L225 Difference]: With dead ends: 14620 [2022-11-18 18:58:29,077 INFO L226 Difference]: Without dead ends: 14620 [2022-11-18 18:58:29,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:58:29,077 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:29,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-18 18:58:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14620 states. [2022-11-18 18:58:29,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14620 to 13979. [2022-11-18 18:58:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13979 states, 13974 states have (on average 4.941892085301274) internal successors, (69058), 13978 states have internal predecessors, (69058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:29,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13979 states to 13979 states and 69058 transitions. [2022-11-18 18:58:29,630 INFO L78 Accepts]: Start accepts. Automaton has 13979 states and 69058 transitions. Word has length 15 [2022-11-18 18:58:29,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:29,630 INFO L495 AbstractCegarLoop]: Abstraction has 13979 states and 69058 transitions. [2022-11-18 18:58:29,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:29,631 INFO L276 IsEmpty]: Start isEmpty. Operand 13979 states and 69058 transitions. [2022-11-18 18:58:29,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:58:29,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:29,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:29,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:29,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:29,837 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:58:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2141167748, now seen corresponding path program 9 times [2022-11-18 18:58:29,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:29,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004899395] [2022-11-18 18:58:29,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:58:29,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:29,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:29,839 INFO L229 MonitoredProcess]: Starting monitored process 199 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:29,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (199)] Waiting until timeout for monitored process [2022-11-18 18:58:30,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:58:30,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:30,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:58:30,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:30,528 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:58:30,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:58:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:30,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:31,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:31,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004899395] [2022-11-18 18:58:31,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004899395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:31,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:31,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:58:31,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107658418] [2022-11-18 18:58:31,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:31,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:58:31,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:31,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:58:31,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:58:31,719 INFO L87 Difference]: Start difference. First operand 13979 states and 69058 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:32,349 INFO L93 Difference]: Finished difference Result 14356 states and 70942 transitions. [2022-11-18 18:58:32,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:58:32,350 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:32,408 INFO L225 Difference]: With dead ends: 14356 [2022-11-18 18:58:32,408 INFO L226 Difference]: Without dead ends: 14356 [2022-11-18 18:58:32,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:58:32,408 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:32,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 37 Unchecked, 0.5s Time] [2022-11-18 18:58:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14356 states. [2022-11-18 18:58:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14356 to 13978. [2022-11-18 18:58:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13978 states, 13973 states have (on average 4.941887926715809) internal successors, (69053), 13977 states have internal predecessors, (69053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13978 states to 13978 states and 69053 transitions. [2022-11-18 18:58:32,932 INFO L78 Accepts]: Start accepts. Automaton has 13978 states and 69053 transitions. Word has length 15 [2022-11-18 18:58:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:32,932 INFO L495 AbstractCegarLoop]: Abstraction has 13978 states and 69053 transitions. [2022-11-18 18:58:32,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 13978 states and 69053 transitions. [2022-11-18 18:58:32,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:58:32,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:32,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:32,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (199)] Ended with exit code 0 [2022-11-18 18:58:33,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:33,139 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:58:33,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:33,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2141177048, now seen corresponding path program 10 times [2022-11-18 18:58:33,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:33,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556525212] [2022-11-18 18:58:33,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:58:33,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:33,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:33,141 INFO L229 MonitoredProcess]: Starting monitored process 200 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:33,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Waiting until timeout for monitored process [2022-11-18 18:58:33,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:58:33,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:33,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:58:33,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:33,792 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:58:33,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:58:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:34,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:34,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:34,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556525212] [2022-11-18 18:58:34,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556525212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:34,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:34,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:58:34,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986331825] [2022-11-18 18:58:34,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:34,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:58:34,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:34,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:58:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:58:34,955 INFO L87 Difference]: Start difference. First operand 13978 states and 69053 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:35,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:35,585 INFO L93 Difference]: Finished difference Result 14445 states and 71407 transitions. [2022-11-18 18:58:35,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:58:35,587 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:35,842 INFO L225 Difference]: With dead ends: 14445 [2022-11-18 18:58:35,843 INFO L226 Difference]: Without dead ends: 14445 [2022-11-18 18:58:35,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:58:35,843 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:35,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-11-18 18:58:35,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14445 states. [2022-11-18 18:58:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14445 to 13978. [2022-11-18 18:58:36,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13978 states, 13973 states have (on average 4.941887926715809) internal successors, (69053), 13977 states have internal predecessors, (69053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13978 states to 13978 states and 69053 transitions. [2022-11-18 18:58:36,189 INFO L78 Accepts]: Start accepts. Automaton has 13978 states and 69053 transitions. Word has length 15 [2022-11-18 18:58:36,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:36,189 INFO L495 AbstractCegarLoop]: Abstraction has 13978 states and 69053 transitions. [2022-11-18 18:58:36,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:36,189 INFO L276 IsEmpty]: Start isEmpty. Operand 13978 states and 69053 transitions. [2022-11-18 18:58:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:58:36,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:36,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:36,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:36,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:36,396 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:58:36,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:36,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2136758897, now seen corresponding path program 11 times [2022-11-18 18:58:36,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:36,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435839057] [2022-11-18 18:58:36,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:58:36,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:36,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:36,398 INFO L229 MonitoredProcess]: Starting monitored process 201 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:36,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (201)] Waiting until timeout for monitored process [2022-11-18 18:58:37,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:58:37,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:37,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:58:37,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:37,238 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:58:37,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:58:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:58:37,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:58:38,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:38,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435839057] [2022-11-18 18:58:38,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435839057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:38,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:38,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:58:38,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655879655] [2022-11-18 18:58:38,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:38,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:58:38,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:38,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:58:38,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:58:38,799 INFO L87 Difference]: Start difference. First operand 13978 states and 69053 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:39,470 INFO L93 Difference]: Finished difference Result 14296 states and 70551 transitions. [2022-11-18 18:58:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:58:39,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:39,531 INFO L225 Difference]: With dead ends: 14296 [2022-11-18 18:58:39,532 INFO L226 Difference]: Without dead ends: 14296 [2022-11-18 18:58:39,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:58:39,532 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:39,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 67 Unchecked, 0.5s Time] [2022-11-18 18:58:39,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14296 states. [2022-11-18 18:58:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14296 to 13979. [2022-11-18 18:58:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13979 states, 13974 states have (on average 4.9418205238299695) internal successors, (69057), 13978 states have internal predecessors, (69057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13979 states to 13979 states and 69057 transitions. [2022-11-18 18:58:39,893 INFO L78 Accepts]: Start accepts. Automaton has 13979 states and 69057 transitions. Word has length 15 [2022-11-18 18:58:39,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:39,893 INFO L495 AbstractCegarLoop]: Abstraction has 13979 states and 69057 transitions. [2022-11-18 18:58:39,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:39,893 INFO L276 IsEmpty]: Start isEmpty. Operand 13979 states and 69057 transitions. [2022-11-18 18:58:39,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:58:39,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:39,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:39,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (201)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:40,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:40,099 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:58:40,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:40,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2136763268, now seen corresponding path program 11 times [2022-11-18 18:58:40,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:40,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805450783] [2022-11-18 18:58:40,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:58:40,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:40,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:40,101 INFO L229 MonitoredProcess]: Starting monitored process 202 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:40,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (202)] Waiting until timeout for monitored process [2022-11-18 18:58:40,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:58:40,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:40,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:58:40,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:40,913 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:58:40,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:58:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:58:41,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:58:42,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:42,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805450783] [2022-11-18 18:58:42,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805450783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:42,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:42,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 18:58:42,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056685173] [2022-11-18 18:58:42,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:42,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:58:42,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:42,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:58:42,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:58:42,349 INFO L87 Difference]: Start difference. First operand 13979 states and 69057 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:42,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:42,743 INFO L93 Difference]: Finished difference Result 14271 states and 70515 transitions. [2022-11-18 18:58:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:58:42,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:42,809 INFO L225 Difference]: With dead ends: 14271 [2022-11-18 18:58:42,809 INFO L226 Difference]: Without dead ends: 14271 [2022-11-18 18:58:42,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:58:42,810 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:42,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-18 18:58:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14271 states. [2022-11-18 18:58:43,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14271 to 13979. [2022-11-18 18:58:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13979 states, 13974 states have (on average 4.9418205238299695) internal successors, (69057), 13978 states have internal predecessors, (69057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:43,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13979 states to 13979 states and 69057 transitions. [2022-11-18 18:58:43,319 INFO L78 Accepts]: Start accepts. Automaton has 13979 states and 69057 transitions. Word has length 15 [2022-11-18 18:58:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:43,320 INFO L495 AbstractCegarLoop]: Abstraction has 13979 states and 69057 transitions. [2022-11-18 18:58:43,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 13979 states and 69057 transitions. [2022-11-18 18:58:43,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:58:43,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:43,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:43,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (202)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:43,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:43,526 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 18:58:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash 531560241, now seen corresponding path program 12 times [2022-11-18 18:58:43,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:43,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365435486] [2022-11-18 18:58:43,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:58:43,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:43,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:43,528 INFO L229 MonitoredProcess]: Starting monitored process 203 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:43,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c78c316-c357-4cdc-aa01-e7baa29faa22/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (203)] Waiting until timeout for monitored process [2022-11-18 18:58:44,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:58:44,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:44,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:58:44,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:44,181 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 18:58:44,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 18:58:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:44,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:58:45,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:45,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365435486] [2022-11-18 18:58:45,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365435486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:45,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:45,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 18:58:45,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311815265] [2022-11-18 18:58:45,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:45,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:58:45,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:58:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:58:45,371 INFO L87 Difference]: Start difference. First operand 13979 states and 69057 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:46,267 INFO L93 Difference]: Finished difference Result 14936 states and 73453 transitions. [2022-11-18 18:58:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:58:46,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:58:46,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:46,333 INFO L225 Difference]: With dead ends: 14936 [2022-11-18 18:58:46,333 INFO L226 Difference]: Without dead ends: 14936 [2022-11-18 18:58:46,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:58:46,333 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:46,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 52 Unchecked, 0.7s Time] [2022-11-18 18:58:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14936 states.