./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--misc--ims-pcu.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--misc--ims-pcu.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 7f108eec0e6f75d7c7724c96156fb3bec5ecbcd0f2a8def1b3ebffa34d9deb6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:53:33,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:53:33,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:53:33,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:53:33,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:53:33,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:53:33,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:53:33,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:53:33,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:53:33,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:53:33,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:53:33,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:53:33,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:53:33,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:53:33,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:53:33,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:53:33,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:53:33,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:53:33,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:53:33,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:53:33,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:53:33,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:53:33,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:53:33,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:53:33,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:53:33,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:53:33,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:53:33,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:53:33,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:53:33,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:53:33,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:53:33,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:53:33,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:53:33,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:53:33,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:53:33,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:53:33,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:53:33,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:53:33,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:53:33,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:53:33,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:53:33,650 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 00:53:33,700 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:53:33,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:53:33,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:53:33,701 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:53:33,701 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:53:33,702 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:53:33,702 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:53:33,702 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:53:33,702 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:53:33,702 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:53:33,702 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:53:33,703 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:53:33,703 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:53:33,703 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:53:33,703 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:53:33,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:53:33,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:53:33,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:53:33,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:53:33,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:53:33,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:53:33,709 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:53:33,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:53:33,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:53:33,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:53:33,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:53:33,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:53:33,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:33,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:53:33,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:53:33,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:53:33,714 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:53:33,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:53:33,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:53:33,714 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:53:33,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:53:33,715 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f108eec0e6f75d7c7724c96156fb3bec5ecbcd0f2a8def1b3ebffa34d9deb6c [2021-11-07 00:53:34,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:53:34,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:53:34,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:53:34,040 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:53:34,040 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:53:34,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--misc--ims-pcu.ko-entry_point.cil.out.i [2021-11-07 00:53:34,105 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/data/be88ca332/e685185dd37f4152b6b54b386c4854bb/FLAG8e426c070 [2021-11-07 00:53:34,945 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:53:34,945 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--misc--ims-pcu.ko-entry_point.cil.out.i [2021-11-07 00:53:34,995 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/data/be88ca332/e685185dd37f4152b6b54b386c4854bb/FLAG8e426c070 [2021-11-07 00:53:35,432 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/data/be88ca332/e685185dd37f4152b6b54b386c4854bb [2021-11-07 00:53:35,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:53:35,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:53:35,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:35,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:53:35,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:53:35,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:35" (1/1) ... [2021-11-07 00:53:35,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f99539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:35, skipping insertion in model container [2021-11-07 00:53:35,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:35" (1/1) ... [2021-11-07 00:53:35,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:53:35,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:36,593 WARN L228 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_2ab6199e-69c7-4384-b7b7-ff69accc63e4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--misc--ims-pcu.ko-entry_point.cil.out.i[114617,114630] [2021-11-07 00:53:36,949 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:36,951 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:36,967 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:36,995 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:36,996 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:37,025 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:37,030 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:37,032 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:37,063 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:37,064 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:37,075 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:37,077 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:37,097 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:37,114 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:37,135 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:37,142 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:37,157 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:37,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:37,479 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 00:53:37,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1ebc276f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:37, skipping insertion in model container [2021-11-07 00:53:37,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:37,480 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:53:37,483 INFO L168 Benchmark]: Toolchain (without parser) took 2044.49 ms. Allocated memory was 115.3 MB in the beginning and 161.5 MB in the end (delta: 46.1 MB). Free memory was 87.2 MB in the beginning and 105.7 MB in the end (delta: -18.5 MB). Peak memory consumption was 47.4 MB. Max. memory is 16.1 GB. [2021-11-07 00:53:37,483 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 115.3 MB. Free memory was 88.8 MB in the beginning and 88.8 MB in the end (delta: 62.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:53:37,484 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2041.50 ms. Allocated memory was 115.3 MB in the beginning and 161.5 MB in the end (delta: 46.1 MB). Free memory was 86.8 MB in the beginning and 105.7 MB in the end (delta: -18.8 MB). Peak memory consumption was 47.4 MB. Max. memory is 16.1 GB. [2021-11-07 00:53:37,486 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 115.3 MB. Free memory was 88.8 MB in the beginning and 88.8 MB in the end (delta: 62.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2041.50 ms. Allocated memory was 115.3 MB in the beginning and 161.5 MB in the end (delta: 46.1 MB). Free memory was 86.8 MB in the beginning and 105.7 MB in the end (delta: -18.8 MB). Peak memory consumption was 47.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4145]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--misc--ims-pcu.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 7f108eec0e6f75d7c7724c96156fb3bec5ecbcd0f2a8def1b3ebffa34d9deb6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:53:39,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:53:39,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:53:39,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:53:39,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:53:39,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:53:39,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:53:39,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:53:39,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:53:39,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:53:39,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:53:39,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:53:39,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:53:39,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:53:39,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:53:39,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:53:39,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:53:39,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:53:39,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:53:39,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:53:39,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:53:39,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:53:39,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:53:39,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:53:39,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:53:39,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:53:39,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:53:39,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:53:39,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:53:39,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:53:39,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:53:39,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:53:39,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:53:39,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:53:39,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:53:39,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:53:39,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:53:39,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:53:39,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:53:39,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:53:39,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:53:39,830 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 00:53:39,866 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:53:39,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:53:39,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:53:39,868 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:53:39,868 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:53:39,868 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:53:39,868 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:53:39,869 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:53:39,869 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:53:39,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:53:39,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:53:39,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:53:39,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:53:39,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:53:39,872 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:53:39,872 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:53:39,873 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:53:39,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:53:39,873 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:53:39,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:53:39,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:53:39,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:53:39,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:53:39,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:39,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:53:39,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:53:39,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:53:39,875 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:53:39,875 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:53:39,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:53:39,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:53:39,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:53:39,876 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_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f108eec0e6f75d7c7724c96156fb3bec5ecbcd0f2a8def1b3ebffa34d9deb6c [2021-11-07 00:53:40,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:53:40,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:53:40,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:53:40,314 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:53:40,315 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:53:40,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--misc--ims-pcu.ko-entry_point.cil.out.i [2021-11-07 00:53:40,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/data/43c935370/1c3d176543534e4691ea8c61a4a824f5/FLAGfe9678b14 [2021-11-07 00:53:41,354 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:53:41,355 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--misc--ims-pcu.ko-entry_point.cil.out.i [2021-11-07 00:53:41,390 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/data/43c935370/1c3d176543534e4691ea8c61a4a824f5/FLAGfe9678b14 [2021-11-07 00:53:41,809 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/data/43c935370/1c3d176543534e4691ea8c61a4a824f5 [2021-11-07 00:53:41,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:53:41,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:53:41,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:41,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:53:41,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:53:41,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:41" (1/1) ... [2021-11-07 00:53:41,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58194df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:41, skipping insertion in model container [2021-11-07 00:53:41,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:41" (1/1) ... [2021-11-07 00:53:41,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:53:41,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:43,019 WARN L228 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_2ab6199e-69c7-4384-b7b7-ff69accc63e4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--misc--ims-pcu.ko-entry_point.cil.out.i[114617,114630] [2021-11-07 00:53:43,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:43,742 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:53:43,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:43,940 WARN L228 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_2ab6199e-69c7-4384-b7b7-ff69accc63e4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--misc--ims-pcu.ko-entry_point.cil.out.i[114617,114630] [2021-11-07 00:53:44,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:44,210 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:53:44,351 WARN L228 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_2ab6199e-69c7-4384-b7b7-ff69accc63e4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--misc--ims-pcu.ko-entry_point.cil.out.i[114617,114630] [2021-11-07 00:53:44,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:44,723 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:53:44,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44 WrapperNode [2021-11-07 00:53:44,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:44,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:44,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:53:44,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:53:44,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:44,836 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:45,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:45,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:53:45,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:53:45,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:53:45,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:45,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:45,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:45,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:46,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:46,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:46,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:46,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:53:46,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:53:46,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:53:46,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:53:46,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:46,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:46,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:53:46,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:53:46,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:53:46,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 00:53:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 00:53:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 00:53:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 00:53:46,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 00:53:46,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 00:53:46,742 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-07 00:53:46,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-07 00:53:46,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:53:46,742 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 00:53:46,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 00:53:46,743 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-07 00:53:46,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 00:53:46,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 00:53:46,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 00:53:46,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 00:53:46,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 00:53:46,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 00:53:46,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 00:53:46,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:53:46,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 00:53:46,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 00:53:46,745 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_8 [2021-11-07 00:53:46,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_8 [2021-11-07 00:53:46,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 00:53:46,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 00:53:46,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 00:53:46,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 00:53:46,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 00:53:46,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 00:53:46,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 00:53:46,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 00:53:46,748 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 00:53:46,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 00:53:46,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 00:53:46,748 INFO L130 BoogieDeclarations]: Found specification of procedure ims_pcu_irq [2021-11-07 00:53:46,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ims_pcu_irq [2021-11-07 00:53:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 00:53:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:53:46,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:58:05,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:58:05,392 INFO L299 CfgBuilder]: Removed 2529 assume(true) statements. [2021-11-07 00:58:05,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:58:05 BoogieIcfgContainer [2021-11-07 00:58:05,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:58:05,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:58:05,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:58:05,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:58:05,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:53:41" (1/3) ... [2021-11-07 00:58:05,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8a7add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:58:05, skipping insertion in model container [2021-11-07 00:58:05,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (2/3) ... [2021-11-07 00:58:05,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8a7add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:58:05, skipping insertion in model container [2021-11-07 00:58:05,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:58:05" (3/3) ... [2021-11-07 00:58:05,409 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--input--misc--ims-pcu.ko-entry_point.cil.out.i [2021-11-07 00:58:05,414 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:58:05,414 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 00:58:05,473 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:58:05,479 INFO L339 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 00:58:05,479 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 00:58:05,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 2894 states, 2873 states have (on average 1.4246432300730942) internal successors, (4093), 2879 states have internal predecessors, (4093), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-07 00:58:05,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 00:58:05,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:05,555 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:05,555 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:05,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:05,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1256768685, now seen corresponding path program 1 times [2021-11-07 00:58:05,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:05,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073545528] [2021-11-07 00:58:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:05,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:05,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:05,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:05,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:58:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:09,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:58:09,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:09,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:09,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:09,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073545528] [2021-11-07 00:58:09,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073545528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:09,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:09,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:58:09,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763255530] [2021-11-07 00:58:09,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:09,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:09,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:09,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:09,957 INFO L87 Difference]: Start difference. First operand has 2894 states, 2873 states have (on average 1.4246432300730942) internal successors, (4093), 2879 states have internal predecessors, (4093), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:10,643 INFO L93 Difference]: Finished difference Result 5788 states and 8233 transitions. [2021-11-07 00:58:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:10,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 00:58:10,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:10,685 INFO L225 Difference]: With dead ends: 5788 [2021-11-07 00:58:10,685 INFO L226 Difference]: Without dead ends: 2880 [2021-11-07 00:58:10,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:10,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-11-07 00:58:10,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2880. [2021-11-07 00:58:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2880 states, 2860 states have (on average 1.402097902097902) internal successors, (4010), 2865 states have internal predecessors, (4010), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-07 00:58:10,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 4032 transitions. [2021-11-07 00:58:10,886 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 4032 transitions. Word has length 71 [2021-11-07 00:58:10,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:10,887 INFO L470 AbstractCegarLoop]: Abstraction has 2880 states and 4032 transitions. [2021-11-07 00:58:10,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 4032 transitions. [2021-11-07 00:58:10,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 00:58:10,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:10,897 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:10,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:11,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:11,122 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:11,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:11,123 INFO L85 PathProgramCache]: Analyzing trace with hash -693489613, now seen corresponding path program 1 times [2021-11-07 00:58:11,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:11,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697015366] [2021-11-07 00:58:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:11,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:11,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:11,129 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:11,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:58:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:14,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:14,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:14,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:15,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:15,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697015366] [2021-11-07 00:58:15,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697015366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:15,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1091215858] [2021-11-07 00:58:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:15,493 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:15,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:15,504 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:15,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-07 00:58:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:17,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:58:17,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:58:17,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:58:17,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1091215858] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:17,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:17,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 00:58:17,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130215434] [2021-11-07 00:58:17,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:17,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:17,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:17,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:58:17,858 INFO L87 Difference]: Start difference. First operand 2880 states and 4032 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:20,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:20,676 INFO L93 Difference]: Finished difference Result 10954 states and 15460 transitions. [2021-11-07 00:58:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:20,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 00:58:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:20,726 INFO L225 Difference]: With dead ends: 10954 [2021-11-07 00:58:20,726 INFO L226 Difference]: Without dead ends: 8201 [2021-11-07 00:58:20,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:58:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8201 states. [2021-11-07 00:58:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8201 to 8201. [2021-11-07 00:58:21,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8151 states have (on average 1.41209667525457) internal successors, (11510), 8158 states have internal predecessors, (11510), 33 states have call successors, (33), 12 states have call predecessors, (33), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-07 00:58:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 11576 transitions. [2021-11-07 00:58:21,114 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 11576 transitions. Word has length 73 [2021-11-07 00:58:21,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:21,116 INFO L470 AbstractCegarLoop]: Abstraction has 8201 states and 11576 transitions. [2021-11-07 00:58:21,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 11576 transitions. [2021-11-07 00:58:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 00:58:21,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:21,119 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:21,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:21,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:21,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:21,553 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash -320884959, now seen corresponding path program 1 times [2021-11-07 00:58:21,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:21,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404192284] [2021-11-07 00:58:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:21,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:21,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:21,558 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:21,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:58:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:25,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:25,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:25,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:25,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:25,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404192284] [2021-11-07 00:58:25,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404192284] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:25,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1395315936] [2021-11-07 00:58:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:25,917 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:25,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:25,928 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:25,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 00:58:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:58:27,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:58:29,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:58:30,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1395315936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:30,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:30,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-07 00:58:30,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380437679] [2021-11-07 00:58:30,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:30,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:30,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:30,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:58:30,228 INFO L87 Difference]: Start difference. First operand 8201 states and 11576 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:31,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:31,399 INFO L93 Difference]: Finished difference Result 24347 states and 34522 transitions. [2021-11-07 00:58:31,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:31,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 00:58:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:31,535 INFO L225 Difference]: With dead ends: 24347 [2021-11-07 00:58:31,535 INFO L226 Difference]: Without dead ends: 16273 [2021-11-07 00:58:31,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:58:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16273 states. [2021-11-07 00:58:32,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16273 to 16261. [2021-11-07 00:58:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16261 states, 16166 states have (on average 1.4120994680192998) internal successors, (22828), 16176 states have internal predecessors, (22828), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (99), 66 states have call predecessors, (99), 66 states have call successors, (99) [2021-11-07 00:58:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16261 states to 16261 states and 22993 transitions. [2021-11-07 00:58:32,385 INFO L78 Accepts]: Start accepts. Automaton has 16261 states and 22993 transitions. Word has length 80 [2021-11-07 00:58:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:32,388 INFO L470 AbstractCegarLoop]: Abstraction has 16261 states and 22993 transitions. [2021-11-07 00:58:32,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:32,389 INFO L276 IsEmpty]: Start isEmpty. Operand 16261 states and 22993 transitions. [2021-11-07 00:58:32,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 00:58:32,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:32,393 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:32,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:32,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-07 00:58:32,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:32,817 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:32,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:32,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1357491264, now seen corresponding path program 1 times [2021-11-07 00:58:32,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:32,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747002458] [2021-11-07 00:58:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:32,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:32,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:32,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:32,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:58:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:36,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:36,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:36,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:37,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:37,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747002458] [2021-11-07 00:58:37,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747002458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:37,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [402856076] [2021-11-07 00:58:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:37,213 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:37,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:37,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:37,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 00:58:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:39,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:58:39,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:58:40,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:58:41,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [402856076] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:41,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:41,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-07 00:58:41,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005198798] [2021-11-07 00:58:41,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:41,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:41,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:41,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:58:41,186 INFO L87 Difference]: Start difference. First operand 16261 states and 22993 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:41,863 INFO L93 Difference]: Finished difference Result 16261 states and 22993 transitions. [2021-11-07 00:58:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:58:41,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 00:58:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:41,909 INFO L225 Difference]: With dead ends: 16261 [2021-11-07 00:58:41,909 INFO L226 Difference]: Without dead ends: 16259 [2021-11-07 00:58:41,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:58:41,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16259 states. [2021-11-07 00:58:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16259 to 16259. [2021-11-07 00:58:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16259 states, 16165 states have (on average 1.4120630992885865) internal successors, (22826), 16174 states have internal predecessors, (22826), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (99), 66 states have call predecessors, (99), 66 states have call successors, (99) [2021-11-07 00:58:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16259 states to 16259 states and 22991 transitions. [2021-11-07 00:58:42,576 INFO L78 Accepts]: Start accepts. Automaton has 16259 states and 22991 transitions. Word has length 81 [2021-11-07 00:58:42,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:42,578 INFO L470 AbstractCegarLoop]: Abstraction has 16259 states and 22991 transitions. [2021-11-07 00:58:42,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 16259 states and 22991 transitions. [2021-11-07 00:58:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 00:58:42,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:42,580 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:42,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:42,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:42,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:43,000 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:43,000 INFO L85 PathProgramCache]: Analyzing trace with hash 867451659, now seen corresponding path program 1 times [2021-11-07 00:58:43,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:43,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085031959] [2021-11-07 00:58:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:43,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:43,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:43,003 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:43,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:58:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:46,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1663 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:46,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:47,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:47,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:47,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085031959] [2021-11-07 00:58:47,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085031959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:47,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [376350579] [2021-11-07 00:58:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:47,493 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:47,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:47,495 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:47,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 00:58:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:49,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1663 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:58:49,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:58:50,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:58:50,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [376350579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:50,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:50,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 00:58:50,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906344894] [2021-11-07 00:58:50,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:58:50,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:50,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:58:50,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:58:50,802 INFO L87 Difference]: Start difference. First operand 16259 states and 22991 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:51,324 INFO L93 Difference]: Finished difference Result 16259 states and 22991 transitions. [2021-11-07 00:58:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:58:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 00:58:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:51,366 INFO L225 Difference]: With dead ends: 16259 [2021-11-07 00:58:51,366 INFO L226 Difference]: Without dead ends: 16257 [2021-11-07 00:58:51,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:58:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16257 states. [2021-11-07 00:58:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16257 to 16257. [2021-11-07 00:58:52,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16257 states, 16164 states have (on average 1.4120267260579065) internal successors, (22824), 16172 states have internal predecessors, (22824), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (99), 66 states have call predecessors, (99), 66 states have call successors, (99) [2021-11-07 00:58:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16257 states to 16257 states and 22989 transitions. [2021-11-07 00:58:52,221 INFO L78 Accepts]: Start accepts. Automaton has 16257 states and 22989 transitions. Word has length 82 [2021-11-07 00:58:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:52,222 INFO L470 AbstractCegarLoop]: Abstraction has 16257 states and 22989 transitions. [2021-11-07 00:58:52,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 16257 states and 22989 transitions. [2021-11-07 00:58:52,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 00:58:52,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:52,231 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:52,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:52,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:52,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:52,652 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:52,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:52,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1121205546, now seen corresponding path program 1 times [2021-11-07 00:58:52,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:52,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232590811] [2021-11-07 00:58:52,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:52,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:52,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:52,660 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:52,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 00:58:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:56,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:56,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:57,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:57,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232590811] [2021-11-07 00:58:57,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232590811] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:57,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1376128341] [2021-11-07 00:58:57,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:57,495 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:57,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:57,500 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:57,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 00:58:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:59,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:58:59,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:59:00,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:59:00,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1376128341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:00,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:59:00,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 00:59:00,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652106587] [2021-11-07 00:59:00,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:00,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:00,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:00,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:59:00,692 INFO L87 Difference]: Start difference. First operand 16257 states and 22989 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:01,358 INFO L93 Difference]: Finished difference Result 16257 states and 22989 transitions. [2021-11-07 00:59:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:01,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 00:59:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:01,400 INFO L225 Difference]: With dead ends: 16257 [2021-11-07 00:59:01,401 INFO L226 Difference]: Without dead ends: 16255 [2021-11-07 00:59:01,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:59:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16255 states. [2021-11-07 00:59:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16255 to 16255. [2021-11-07 00:59:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16255 states, 16163 states have (on average 1.4119903483264244) internal successors, (22822), 16170 states have internal predecessors, (22822), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (99), 66 states have call predecessors, (99), 66 states have call successors, (99) [2021-11-07 00:59:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16255 states to 16255 states and 22987 transitions. [2021-11-07 00:59:02,204 INFO L78 Accepts]: Start accepts. Automaton has 16255 states and 22987 transitions. Word has length 83 [2021-11-07 00:59:02,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:02,205 INFO L470 AbstractCegarLoop]: Abstraction has 16255 states and 22987 transitions. [2021-11-07 00:59:02,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:02,205 INFO L276 IsEmpty]: Start isEmpty. Operand 16255 states and 22987 transitions. [2021-11-07 00:59:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 00:59:02,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:02,209 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:02,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:02,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:02,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:02,633 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:02,633 INFO L85 PathProgramCache]: Analyzing trace with hash 397641461, now seen corresponding path program 1 times [2021-11-07 00:59:02,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:02,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907123544] [2021-11-07 00:59:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:02,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:02,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:02,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:02,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 00:59:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:06,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:59:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:06,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:07,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:07,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907123544] [2021-11-07 00:59:07,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907123544] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:07,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [568830443] [2021-11-07 00:59:07,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:07,315 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:07,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:59:07,317 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:59:07,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 00:59:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:09,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:59:09,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:59:10,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:59:10,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [568830443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:10,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:59:10,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 00:59:10,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626285891] [2021-11-07 00:59:10,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:10,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:10,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:10,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:59:10,567 INFO L87 Difference]: Start difference. First operand 16255 states and 22987 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:11,046 INFO L93 Difference]: Finished difference Result 16255 states and 22987 transitions. [2021-11-07 00:59:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:11,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 00:59:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:11,087 INFO L225 Difference]: With dead ends: 16255 [2021-11-07 00:59:11,087 INFO L226 Difference]: Without dead ends: 16246 [2021-11-07 00:59:11,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:59:11,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16246 states. [2021-11-07 00:59:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16246 to 16246. [2021-11-07 00:59:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16246 states, 16155 states have (on average 1.4119467657072113) internal successors, (22810), 16161 states have internal predecessors, (22810), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (99), 66 states have call predecessors, (99), 66 states have call successors, (99) [2021-11-07 00:59:11,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16246 states to 16246 states and 22975 transitions. [2021-11-07 00:59:11,801 INFO L78 Accepts]: Start accepts. Automaton has 16246 states and 22975 transitions. Word has length 84 [2021-11-07 00:59:11,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:11,801 INFO L470 AbstractCegarLoop]: Abstraction has 16246 states and 22975 transitions. [2021-11-07 00:59:11,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:11,801 INFO L276 IsEmpty]: Start isEmpty. Operand 16246 states and 22975 transitions. [2021-11-07 00:59:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 00:59:11,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:11,816 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:11,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:12,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:12,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:12,234 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:12,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:12,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1557808505, now seen corresponding path program 1 times [2021-11-07 00:59:12,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:12,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377970875] [2021-11-07 00:59:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:12,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:12,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:12,239 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:12,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 00:59:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:16,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 2010 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:59:16,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 00:59:16,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 00:59:17,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:17,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377970875] [2021-11-07 00:59:17,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377970875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:17,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1360268796] [2021-11-07 00:59:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:17,516 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:17,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:59:17,531 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:59:17,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 00:59:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:19,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 2010 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:59:19,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:59:20,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:59:20,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1360268796] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:20,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:59:20,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 00:59:20,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914443399] [2021-11-07 00:59:20,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:20,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:20,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:20,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:59:20,908 INFO L87 Difference]: Start difference. First operand 16246 states and 22975 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:21,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:21,942 INFO L93 Difference]: Finished difference Result 42523 states and 60524 transitions. [2021-11-07 00:59:21,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:21,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-07 00:59:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:21,998 INFO L225 Difference]: With dead ends: 42523 [2021-11-07 00:59:21,999 INFO L226 Difference]: Without dead ends: 26404 [2021-11-07 00:59:22,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:59:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26404 states. [2021-11-07 00:59:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26404 to 24704. [2021-11-07 00:59:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24704 states, 24613 states have (on average 1.4248567830008532) internal successors, (35070), 24619 states have internal predecessors, (35070), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (99), 66 states have call predecessors, (99), 66 states have call successors, (99) [2021-11-07 00:59:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24704 states to 24704 states and 35235 transitions. [2021-11-07 00:59:23,382 INFO L78 Accepts]: Start accepts. Automaton has 24704 states and 35235 transitions. Word has length 141 [2021-11-07 00:59:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:23,382 INFO L470 AbstractCegarLoop]: Abstraction has 24704 states and 35235 transitions. [2021-11-07 00:59:23,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:23,383 INFO L276 IsEmpty]: Start isEmpty. Operand 24704 states and 35235 transitions. [2021-11-07 00:59:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 00:59:23,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:23,408 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:23,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:23,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 00:59:23,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:23,828 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:23,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1371645422, now seen corresponding path program 1 times [2021-11-07 00:59:23,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:23,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744969723] [2021-11-07 00:59:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:23,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:23,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:23,831 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:23,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 00:59:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:27,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:59:27,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-07 00:59:28,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-07 00:59:29,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:29,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744969723] [2021-11-07 00:59:29,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744969723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:29,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1636326599] [2021-11-07 00:59:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:29,201 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:29,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:59:29,207 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:59:29,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 00:59:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:31,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:59:31,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 00:59:32,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 00:59:32,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1636326599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:32,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:59:32,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 00:59:32,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421370741] [2021-11-07 00:59:32,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:32,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:32,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:32,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:59:32,718 INFO L87 Difference]: Start difference. First operand 24704 states and 35235 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:35,580 INFO L93 Difference]: Finished difference Result 42274 states and 60329 transitions. [2021-11-07 00:59:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:35,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-07 00:59:35,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:35,615 INFO L225 Difference]: With dead ends: 42274 [2021-11-07 00:59:35,615 INFO L226 Difference]: Without dead ends: 17696 [2021-11-07 00:59:35,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:59:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17696 states. [2021-11-07 00:59:36,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17696 to 17693. [2021-11-07 00:59:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17693 states, 17632 states have (on average 1.4253062613430127) internal successors, (25131), 17636 states have internal predecessors, (25131), 44 states have call successors, (44), 16 states have call predecessors, (44), 16 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-07 00:59:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17693 states to 17693 states and 25241 transitions. [2021-11-07 00:59:36,762 INFO L78 Accepts]: Start accepts. Automaton has 17693 states and 25241 transitions. Word has length 164 [2021-11-07 00:59:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:36,762 INFO L470 AbstractCegarLoop]: Abstraction has 17693 states and 25241 transitions. [2021-11-07 00:59:36,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 17693 states and 25241 transitions. [2021-11-07 00:59:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-07 00:59:36,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:36,783 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:36,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:37,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:37,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:37,203 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:37,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:37,203 INFO L85 PathProgramCache]: Analyzing trace with hash 326023896, now seen corresponding path program 1 times [2021-11-07 00:59:37,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:37,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958189717] [2021-11-07 00:59:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:37,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:37,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:37,207 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:37,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 00:59:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:41,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 2165 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:59:41,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 00:59:42,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 00:59:42,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:42,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958189717] [2021-11-07 00:59:42,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958189717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:42,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1356373473] [2021-11-07 00:59:42,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:42,899 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:42,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:59:42,899 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:59:42,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 00:59:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:45,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 2165 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:59:45,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 00:59:46,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 00:59:46,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1356373473] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:46,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:59:46,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 00:59:46,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128477957] [2021-11-07 00:59:46,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:59:46,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:46,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:59:46,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 00:59:46,737 INFO L87 Difference]: Start difference. First operand 17693 states and 25241 transitions. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:48,950 INFO L93 Difference]: Finished difference Result 71293 states and 102253 transitions. [2021-11-07 00:59:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:59:48,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-07 00:59:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:49,054 INFO L225 Difference]: With dead ends: 71293 [2021-11-07 00:59:49,054 INFO L226 Difference]: Without dead ends: 55419 [2021-11-07 00:59:49,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 731 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:59:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55419 states. [2021-11-07 00:59:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55419 to 17701. [2021-11-07 00:59:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17701 states, 17640 states have (on average 1.4251133786848074) internal successors, (25139), 17644 states have internal predecessors, (25139), 44 states have call successors, (44), 16 states have call predecessors, (44), 16 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-07 00:59:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17701 states to 17701 states and 25249 transitions. [2021-11-07 00:59:50,444 INFO L78 Accepts]: Start accepts. Automaton has 17701 states and 25249 transitions. Word has length 186 [2021-11-07 00:59:50,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:50,445 INFO L470 AbstractCegarLoop]: Abstraction has 17701 states and 25249 transitions. [2021-11-07 00:59:50,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:50,445 INFO L276 IsEmpty]: Start isEmpty. Operand 17701 states and 25249 transitions. [2021-11-07 00:59:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-07 00:59:50,470 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:50,471 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:50,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:50,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-07 00:59:50,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:50,885 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:50,885 INFO L85 PathProgramCache]: Analyzing trace with hash 914734618, now seen corresponding path program 1 times [2021-11-07 00:59:50,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:50,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707126480] [2021-11-07 00:59:50,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:50,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:50,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:50,889 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:50,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 00:59:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:55,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 2287 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:59:55,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 00:59:56,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 00:59:57,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:57,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707126480] [2021-11-07 00:59:57,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707126480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:57,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1086149922] [2021-11-07 00:59:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:57,337 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:57,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:59:57,337 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:59:57,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:00:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:00,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 2287 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:00:00,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:00:01,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:00:01,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1086149922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:01,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:00:01,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:00:01,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894350870] [2021-11-07 01:00:01,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:00:01,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:01,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:00:01,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:00:01,606 INFO L87 Difference]: Start difference. First operand 17701 states and 25249 transitions. Second operand has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:05,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:05,224 INFO L93 Difference]: Finished difference Result 71613 states and 102637 transitions. [2021-11-07 01:00:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:00:05,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-11-07 01:00:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:05,323 INFO L225 Difference]: With dead ends: 71613 [2021-11-07 01:00:05,323 INFO L226 Difference]: Without dead ends: 55731 [2021-11-07 01:00:05,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 821 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:00:05,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55731 states. [2021-11-07 01:00:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55731 to 17713. [2021-11-07 01:00:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17713 states, 17652 states have (on average 1.4248243825062317) internal successors, (25151), 17656 states have internal predecessors, (25151), 44 states have call successors, (44), 16 states have call predecessors, (44), 16 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-07 01:00:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17713 states to 17713 states and 25261 transitions. [2021-11-07 01:00:06,702 INFO L78 Accepts]: Start accepts. Automaton has 17713 states and 25261 transitions. Word has length 208 [2021-11-07 01:00:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:06,702 INFO L470 AbstractCegarLoop]: Abstraction has 17713 states and 25261 transitions. [2021-11-07 01:00:06,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 17713 states and 25261 transitions. [2021-11-07 01:00:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-07 01:00:06,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:06,718 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:06,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:06,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:07,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:00:07,133 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:07,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1130634817, now seen corresponding path program 1 times [2021-11-07 01:00:07,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:07,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489715372] [2021-11-07 01:00:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:07,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:07,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:07,137 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:07,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:00:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:11,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 2294 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:00:11,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 01:00:12,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 01:00:13,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:13,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489715372] [2021-11-07 01:00:13,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489715372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:00:13,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [774467441] [2021-11-07 01:00:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:13,630 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:00:13,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:00:13,631 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:00:13,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:00:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:16,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 2294 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:00:16,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:00:17,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:00:18,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [774467441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:18,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:00:18,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:00:18,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018667602] [2021-11-07 01:00:18,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:00:18,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:18,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:00:18,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:00:18,168 INFO L87 Difference]: Start difference. First operand 17713 states and 25261 transitions. Second operand has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:22,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:22,340 INFO L93 Difference]: Finished difference Result 71685 states and 102725 transitions. [2021-11-07 01:00:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:00:22,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-11-07 01:00:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:22,578 INFO L225 Difference]: With dead ends: 71685 [2021-11-07 01:00:22,578 INFO L226 Difference]: Without dead ends: 55791 [2021-11-07 01:00:22,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 829 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:00:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55791 states. [2021-11-07 01:00:24,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55791 to 17725. [2021-11-07 01:00:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17725 states, 17664 states have (on average 1.4245357789855073) internal successors, (25163), 17668 states have internal predecessors, (25163), 44 states have call successors, (44), 16 states have call predecessors, (44), 16 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-07 01:00:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17725 states to 17725 states and 25273 transitions. [2021-11-07 01:00:24,141 INFO L78 Accepts]: Start accepts. Automaton has 17725 states and 25273 transitions. Word has length 210 [2021-11-07 01:00:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:24,142 INFO L470 AbstractCegarLoop]: Abstraction has 17725 states and 25273 transitions. [2021-11-07 01:00:24,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 17725 states and 25273 transitions. [2021-11-07 01:00:24,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-07 01:00:24,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:24,162 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:24,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:24,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:24,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:24,584 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:24,584 INFO L85 PathProgramCache]: Analyzing trace with hash -916700582, now seen corresponding path program 1 times [2021-11-07 01:00:24,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:24,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445603742] [2021-11-07 01:00:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:24,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:24,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:24,589 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:24,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:00:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:29,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 2301 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:00:29,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 01:00:30,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 01:00:31,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:31,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445603742] [2021-11-07 01:00:31,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445603742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:00:31,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1583206431] [2021-11-07 01:00:31,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:31,435 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:00:31,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:00:31,440 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:00:31,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:00:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:35,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 2301 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:00:35,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:00:35,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:00:36,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1583206431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:36,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:00:36,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-07 01:00:36,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376707162] [2021-11-07 01:00:36,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:00:36,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:36,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:00:36,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:00:36,675 INFO L87 Difference]: Start difference. First operand 17725 states and 25273 transitions. Second operand has 12 states, 12 states have (on average 17.833333333333332) internal successors, (214), 12 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:56,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:56,260 INFO L93 Difference]: Finished difference Result 154761 states and 221803 transitions. [2021-11-07 01:00:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 01:00:56,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.833333333333332) internal successors, (214), 12 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2021-11-07 01:00:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:56,737 INFO L225 Difference]: With dead ends: 154761 [2021-11-07 01:00:56,737 INFO L226 Difference]: Without dead ends: 138855 [2021-11-07 01:00:56,780 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 840 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=581, Invalid=2499, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 01:00:56,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138855 states. [2021-11-07 01:00:59,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138855 to 17769. [2021-11-07 01:00:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17769 states, 17708 states have (on average 1.423593855884346) internal successors, (25209), 17712 states have internal predecessors, (25209), 44 states have call successors, (44), 16 states have call predecessors, (44), 16 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-07 01:01:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17769 states to 17769 states and 25319 transitions. [2021-11-07 01:01:00,001 INFO L78 Accepts]: Start accepts. Automaton has 17769 states and 25319 transitions. Word has length 212 [2021-11-07 01:01:00,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:00,002 INFO L470 AbstractCegarLoop]: Abstraction has 17769 states and 25319 transitions. [2021-11-07 01:01:00,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.833333333333332) internal successors, (214), 12 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:00,002 INFO L276 IsEmpty]: Start isEmpty. Operand 17769 states and 25319 transitions. [2021-11-07 01:01:00,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-07 01:01:00,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:00,017 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:01:00,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:00,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:00,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:01:00,418 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:01:00,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:00,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1689322972, now seen corresponding path program 1 times [2021-11-07 01:01:00,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:00,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068063786] [2021-11-07 01:01:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:00,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:00,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:00,423 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:00,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ab6199e-69c7-4384-b7b7-ff69accc63e4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:01:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:06,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 2299 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:01:06,262 INFO L286 TraceCheckSpWp]: Computing forward predicates...