./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH --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 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:47:39,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:47:39,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:47:39,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:47:39,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:47:39,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:47:39,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:47:39,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:47:39,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:47:39,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:47:39,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:47:39,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:47:39,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:47:39,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:47:39,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:47:39,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:47:39,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:47:39,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:47:39,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:47:39,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:47:39,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:47:39,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:47:39,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:47:39,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:47:39,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:47:39,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:47:39,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:47:39,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:47:39,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:47:39,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:47:39,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:47:39,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:47:39,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:47:39,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:47:39,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:47:39,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:47:39,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:47:39,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:47:39,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:47:39,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:47:39,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:47:39,974 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 05:47:40,023 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:47:40,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:47:40,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:47:40,025 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:47:40,025 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:47:40,025 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:47:40,025 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:47:40,026 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:47:40,031 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:47:40,032 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:47:40,033 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:47:40,033 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:47:40,033 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:47:40,033 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:47:40,034 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:47:40,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:47:40,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:47:40,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:47:40,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:47:40,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:47:40,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:47:40,036 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:47:40,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:47:40,036 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:47:40,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:47:40,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:47:40,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:47:40,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:47:40,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:47:40,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:47:40,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:47:40,040 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:47:40,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:47:40,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:47:40,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:47:40,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:47:40,041 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_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 [2021-11-03 05:47:40,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:47:40,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:47:40,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:47:40,326 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:47:40,327 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:47:40,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-03 05:47:40,407 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/data/f2508ad48/eeb3ddd470bf418891bf014515c30f1b/FLAG75142ed0e [2021-11-03 05:47:41,282 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:47:41,283 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-03 05:47:41,330 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/data/f2508ad48/eeb3ddd470bf418891bf014515c30f1b/FLAG75142ed0e [2021-11-03 05:47:41,412 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/data/f2508ad48/eeb3ddd470bf418891bf014515c30f1b [2021-11-03 05:47:41,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:47:41,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:47:41,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:47:41,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:47:41,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:47:41,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:47:41" (1/1) ... [2021-11-03 05:47:41,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@754370da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:41, skipping insertion in model container [2021-11-03 05:47:41,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:47:41" (1/1) ... [2021-11-03 05:47:41,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:47:41,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:47:42,301 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:47:42,315 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:47:42,727 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:47:42,961 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:47:42,970 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:47:42,977 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:47:43,054 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:47:43,079 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:47:43,083 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:47:43,102 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:47:43,108 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:47:43,448 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_168427c6-8f36-4d17-9d74-058a8a8ddebd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-03 05:47:43,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:47:43,573 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) [2021-11-03 05:47:43,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d52d38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:43, skipping insertion in model container [2021-11-03 05:47:43,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:47:43,575 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:47:43,577 INFO L168 Benchmark]: Toolchain (without parser) took 2159.43 ms. Allocated memory was 100.7 MB in the beginning and 132.1 MB in the end (delta: 31.5 MB). Free memory was 67.8 MB in the beginning and 73.4 MB in the end (delta: -5.6 MB). Peak memory consumption was 36.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:47:43,578 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 79.7 MB. Free memory was 57.1 MB in the beginning and 57.1 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:47:43,579 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2157.06 ms. Allocated memory was 100.7 MB in the beginning and 132.1 MB in the end (delta: 31.5 MB). Free memory was 67.8 MB in the beginning and 73.4 MB in the end (delta: -5.6 MB). Peak memory consumption was 36.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:47:43,581 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 79.7 MB. Free memory was 57.1 MB in the beginning and 57.1 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2157.06 ms. Allocated memory was 100.7 MB in the beginning and 132.1 MB in the end (delta: 31.5 MB). Free memory was 67.8 MB in the beginning and 73.4 MB in the end (delta: -5.6 MB). Peak memory consumption was 36.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3876]: 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_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH --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 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:47:45,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:47:45,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:47:45,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:47:45,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:47:45,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:47:45,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:47:45,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:47:45,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:47:45,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:47:45,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:47:45,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:47:45,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:47:45,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:47:45,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:47:45,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:47:45,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:47:45,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:47:45,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:47:45,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:47:45,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:47:45,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:47:45,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:47:45,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:47:45,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:47:45,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:47:45,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:47:45,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:47:45,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:47:45,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:47:45,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:47:45,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:47:45,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:47:45,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:47:45,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:47:45,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:47:45,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:47:45,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:47:45,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:47:45,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:47:45,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:47:45,978 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 05:47:46,020 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:47:46,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:47:46,022 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:47:46,022 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:47:46,022 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:47:46,023 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:47:46,023 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:47:46,023 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:47:46,023 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:47:46,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:47:46,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:47:46,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:47:46,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:47:46,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:47:46,025 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:47:46,026 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:47:46,026 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:47:46,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:47:46,026 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:47:46,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:47:46,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:47:46,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:47:46,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:47:46,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:47:46,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:47:46,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:47:46,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:47:46,028 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:47:46,028 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:47:46,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:47:46,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:47:46,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:47:46,029 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_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 [2021-11-03 05:47:46,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:47:46,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:47:46,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:47:46,410 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:47:46,411 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:47:46,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-03 05:47:46,479 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/data/c62624fc0/f02319631bc34901acb88d212d1af13b/FLAG9560e5ed8 [2021-11-03 05:47:47,351 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:47:47,351 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-03 05:47:47,383 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/data/c62624fc0/f02319631bc34901acb88d212d1af13b/FLAG9560e5ed8 [2021-11-03 05:47:47,838 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/data/c62624fc0/f02319631bc34901acb88d212d1af13b [2021-11-03 05:47:47,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:47:47,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:47:47,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:47:47,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:47:47,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:47:47,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:47:47" (1/1) ... [2021-11-03 05:47:47,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7581dee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:47, skipping insertion in model container [2021-11-03 05:47:47,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:47:47" (1/1) ... [2021-11-03 05:47:47,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:47:47,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:47:50,037 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_168427c6-8f36-4d17-9d74-058a8a8ddebd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-03 05:47:50,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:47:50,189 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:47:50,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:47:50,576 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_168427c6-8f36-4d17-9d74-058a8a8ddebd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-03 05:47:50,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:47:50,676 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:47:51,259 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_168427c6-8f36-4d17-9d74-058a8a8ddebd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-03 05:47:51,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:47:51,487 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:47:51,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:51 WrapperNode [2021-11-03 05:47:51,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:47:51,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:47:51,490 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:47:51,490 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:47:51,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:51" (1/1) ... [2021-11-03 05:47:51,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:51" (1/1) ... [2021-11-03 05:47:52,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:47:52,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:47:52,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:47:52,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:47:52,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:51" (1/1) ... [2021-11-03 05:47:52,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:51" (1/1) ... [2021-11-03 05:47:52,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:51" (1/1) ... [2021-11-03 05:47:52,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:51" (1/1) ... [2021-11-03 05:47:52,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:51" (1/1) ... [2021-11-03 05:47:52,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:51" (1/1) ... [2021-11-03 05:47:52,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:51" (1/1) ... [2021-11-03 05:47:52,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:47:52,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:47:52,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:47:52,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:47:52,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:51" (1/1) ... [2021-11-03 05:47:52,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:47:52,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:47:52,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:47:52,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:47:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:47:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2021-11-03 05:47:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-03 05:47:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-03 05:47:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:47:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-03 05:47:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-03 05:47:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-03 05:47:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:47:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 05:47:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:47:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-03 05:47:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-03 05:47:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-03 05:47:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:47:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:47:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 05:47:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-03 05:47:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:47:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-03 05:47:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-03 05:47:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-03 05:47:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-03 05:47:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-03 05:47:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-03 05:47:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:47:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:47:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-03 05:47:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-03 05:47:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-03 05:47:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-03 05:47:52,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-03 05:47:52,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:47:52,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:49:46,287 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:49:46,287 INFO L299 CfgBuilder]: Removed 1993 assume(true) statements. [2021-11-03 05:49:46,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:49:46 BoogieIcfgContainer [2021-11-03 05:49:46,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:49:46,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:49:46,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:49:46,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:49:46,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:47:47" (1/3) ... [2021-11-03 05:49:46,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4715b06f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:49:46, skipping insertion in model container [2021-11-03 05:49:46,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:51" (2/3) ... [2021-11-03 05:49:46,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4715b06f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:49:46, skipping insertion in model container [2021-11-03 05:49:46,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:49:46" (3/3) ... [2021-11-03 05:49:46,301 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-03 05:49:46,306 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:49:46,307 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-11-03 05:49:46,363 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:49:46,369 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 [2021-11-03 05:49:46,369 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-11-03 05:49:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 2026 states, 2006 states have (on average 1.4087736789631107) internal successors, (2826), 2025 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-03 05:49:46,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:46,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:49:46,434 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:49:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:46,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1062845019, now seen corresponding path program 1 times [2021-11-03 05:49:46,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:46,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007647319] [2021-11-03 05:49:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:46,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:46,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:46,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:46,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:49:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:54,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 4613 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:49:54,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:49:55,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:49:56,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:56,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007647319] [2021-11-03 05:49:56,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007647319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:49:56,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:49:56,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:49:56,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971772923] [2021-11-03 05:49:56,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:49:56,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:56,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:49:56,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:49:56,752 INFO L87 Difference]: Start difference. First operand has 2026 states, 2006 states have (on average 1.4087736789631107) internal successors, (2826), 2025 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:56,876 INFO L93 Difference]: Finished difference Result 4048 states and 5647 transitions. [2021-11-03 05:49:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:49:56,878 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-03 05:49:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:56,902 INFO L225 Difference]: With dead ends: 4048 [2021-11-03 05:49:56,903 INFO L226 Difference]: Without dead ends: 2009 [2021-11-03 05:49:56,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:49:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-11-03 05:49:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 2009. [2021-11-03 05:49:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1990 states have (on average 1.3633165829145728) internal successors, (2713), 2008 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2713 transitions. [2021-11-03 05:49:57,042 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2713 transitions. Word has length 103 [2021-11-03 05:49:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:57,042 INFO L470 AbstractCegarLoop]: Abstraction has 2009 states and 2713 transitions. [2021-11-03 05:49:57,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2713 transitions. [2021-11-03 05:49:57,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-03 05:49:57,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:57,047 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:49:57,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 05:49:57,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:49:57,267 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:49:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:57,268 INFO L85 PathProgramCache]: Analyzing trace with hash 666457411, now seen corresponding path program 1 times [2021-11-03 05:49:57,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:57,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390594137] [2021-11-03 05:49:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:57,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:57,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:57,280 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:57,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:50:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:05,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 4613 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:50:05,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:50:06,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:50:06,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:50:06,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390594137] [2021-11-03 05:50:06,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390594137] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:50:06,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:50:06,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:50:06,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895249647] [2021-11-03 05:50:06,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:50:06,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:50:06,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:50:06,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:50:06,844 INFO L87 Difference]: Start difference. First operand 2009 states and 2713 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:50:07,937 INFO L93 Difference]: Finished difference Result 3978 states and 5405 transitions. [2021-11-03 05:50:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:50:07,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-03 05:50:07,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:50:07,951 INFO L225 Difference]: With dead ends: 3978 [2021-11-03 05:50:07,952 INFO L226 Difference]: Without dead ends: 2029 [2021-11-03 05:50:07,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:50:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-11-03 05:50:08,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2029. [2021-11-03 05:50:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2010 states have (on average 1.3597014925373134) internal successors, (2733), 2028 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 2733 transitions. [2021-11-03 05:50:08,017 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 2733 transitions. Word has length 103 [2021-11-03 05:50:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:50:08,019 INFO L470 AbstractCegarLoop]: Abstraction has 2029 states and 2733 transitions. [2021-11-03 05:50:08,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 2733 transitions. [2021-11-03 05:50:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-03 05:50:08,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:50:08,023 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:50:08,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:08,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:50:08,241 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:50:08,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:50:08,242 INFO L85 PathProgramCache]: Analyzing trace with hash 376382417, now seen corresponding path program 1 times [2021-11-03 05:50:08,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:50:08,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486539121] [2021-11-03 05:50:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:08,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:50:08,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:50:08,249 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:50:08,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:50:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:16,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 4688 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:50:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-03 05:50:17,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-03 05:50:19,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:50:19,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486539121] [2021-11-03 05:50:19,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486539121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:50:19,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1347399343] [2021-11-03 05:50:19,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:19,071 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:50:19,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:50:19,076 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:50:19,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-03 05:50:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 4688 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:50:24,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:50:24,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:50:25,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1347399343] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:50:25,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:50:25,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:50:25,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700273251] [2021-11-03 05:50:25,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:50:25,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:50:25,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:50:25,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:50:25,215 INFO L87 Difference]: Start difference. First operand 2029 states and 2733 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:50:27,122 INFO L93 Difference]: Finished difference Result 5124 states and 7012 transitions. [2021-11-03 05:50:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:50:27,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-03 05:50:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:50:27,142 INFO L225 Difference]: With dead ends: 5124 [2021-11-03 05:50:27,142 INFO L226 Difference]: Without dead ends: 3194 [2021-11-03 05:50:27,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:50:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2021-11-03 05:50:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3183. [2021-11-03 05:50:27,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 3164 states have (on average 1.3840075853350189) internal successors, (4379), 3182 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4379 transitions. [2021-11-03 05:50:27,249 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4379 transitions. Word has length 118 [2021-11-03 05:50:27,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:50:27,250 INFO L470 AbstractCegarLoop]: Abstraction has 3183 states and 4379 transitions. [2021-11-03 05:50:27,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:27,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4379 transitions. [2021-11-03 05:50:27,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-03 05:50:27,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:50:27,258 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:50:27,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:27,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:27,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:50:27,681 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:50:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:50:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash -614159399, now seen corresponding path program 1 times [2021-11-03 05:50:27,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:50:27,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477927485] [2021-11-03 05:50:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:27,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:50:27,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:50:27,692 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:50:27,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:50:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:35,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 4701 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:50:35,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-03 05:50:36,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-03 05:50:38,246 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:50:38,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477927485] [2021-11-03 05:50:38,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477927485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:50:38,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1502704784] [2021-11-03 05:50:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:38,247 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:50:38,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:50:38,248 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:50:38,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-03 05:50:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:43,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 4701 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:50:43,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:50:43,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:50:44,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1502704784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:50:44,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:50:44,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:50:44,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543800596] [2021-11-03 05:50:44,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:50:44,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:50:44,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:50:44,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:50:44,357 INFO L87 Difference]: Start difference. First operand 3183 states and 4379 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:50:47,822 INFO L93 Difference]: Finished difference Result 8897 states and 12311 transitions. [2021-11-03 05:50:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:50:47,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-03 05:50:47,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:50:47,856 INFO L225 Difference]: With dead ends: 8897 [2021-11-03 05:50:47,856 INFO L226 Difference]: Without dead ends: 5813 [2021-11-03 05:50:47,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:50:47,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5813 states. [2021-11-03 05:50:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5813 to 5753. [2021-11-03 05:50:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5734 states have (on average 1.3937914196023717) internal successors, (7992), 5752 states have internal predecessors, (7992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 7992 transitions. [2021-11-03 05:50:48,060 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 7992 transitions. Word has length 119 [2021-11-03 05:50:48,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:50:48,061 INFO L470 AbstractCegarLoop]: Abstraction has 5753 states and 7992 transitions. [2021-11-03 05:50:48,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 7992 transitions. [2021-11-03 05:50:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-03 05:50:48,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:50:48,064 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:50:48,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:48,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-03 05:50:48,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:50:48,481 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:50:48,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:50:48,482 INFO L85 PathProgramCache]: Analyzing trace with hash -379267393, now seen corresponding path program 1 times [2021-11-03 05:50:48,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:50:48,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501675620] [2021-11-03 05:50:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:48,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:50:48,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:50:48,492 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:50:48,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:50:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:56,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 4709 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:50:56,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-03 05:50:57,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-03 05:50:59,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:50:59,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501675620] [2021-11-03 05:50:59,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501675620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:50:59,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2080691828] [2021-11-03 05:50:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:59,212 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:50:59,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:50:59,215 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:50:59,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-03 05:51:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:04,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 4709 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:51:04,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:51:05,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:51:05,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2080691828] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:05,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:51:05,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:51:05,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433911245] [2021-11-03 05:51:05,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:51:05,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:05,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:51:05,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:51:05,594 INFO L87 Difference]: Start difference. First operand 5753 states and 7992 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:10,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:10,292 INFO L93 Difference]: Finished difference Result 13691 states and 18905 transitions. [2021-11-03 05:51:10,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:51:10,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-03 05:51:10,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:10,339 INFO L225 Difference]: With dead ends: 13691 [2021-11-03 05:51:10,339 INFO L226 Difference]: Without dead ends: 8037 [2021-11-03 05:51:10,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:51:10,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8037 states. [2021-11-03 05:51:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8037 to 8005. [2021-11-03 05:51:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8005 states, 7986 states have (on average 1.3774104683195592) internal successors, (11000), 8004 states have internal predecessors, (11000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8005 states to 8005 states and 11000 transitions. [2021-11-03 05:51:10,640 INFO L78 Accepts]: Start accepts. Automaton has 8005 states and 11000 transitions. Word has length 123 [2021-11-03 05:51:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:10,640 INFO L470 AbstractCegarLoop]: Abstraction has 8005 states and 11000 transitions. [2021-11-03 05:51:10,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:10,642 INFO L276 IsEmpty]: Start isEmpty. Operand 8005 states and 11000 transitions. [2021-11-03 05:51:10,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-03 05:51:10,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:10,646 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:51:10,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:10,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-03 05:51:11,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:51:11,065 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:51:11,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:11,066 INFO L85 PathProgramCache]: Analyzing trace with hash 880537164, now seen corresponding path program 1 times [2021-11-03 05:51:11,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:11,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329089719] [2021-11-03 05:51:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:11,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:11,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:11,073 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:11,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:51:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:19,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 4892 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:51:19,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:51:21,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:51:22,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:22,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329089719] [2021-11-03 05:51:22,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329089719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:51:22,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1331353055] [2021-11-03 05:51:22,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:22,936 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:51:22,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:51:22,937 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:51:22,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-03 05:51:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:28,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 4892 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:51:28,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:51:28,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:51:29,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1331353055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:29,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:51:29,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:51:29,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182596346] [2021-11-03 05:51:29,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:51:29,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:29,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:51:29,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:51:29,382 INFO L87 Difference]: Start difference. First operand 8005 states and 11000 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:30,244 INFO L93 Difference]: Finished difference Result 15911 states and 21893 transitions. [2021-11-03 05:51:30,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:51:30,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-03 05:51:30,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:30,286 INFO L225 Difference]: With dead ends: 15911 [2021-11-03 05:51:30,286 INFO L226 Difference]: Without dead ends: 8005 [2021-11-03 05:51:30,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:51:30,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8005 states. [2021-11-03 05:51:30,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8005 to 7849. [2021-11-03 05:51:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7849 states, 7830 states have (on average 1.3804597701149426) internal successors, (10809), 7848 states have internal predecessors, (10809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7849 states to 7849 states and 10809 transitions. [2021-11-03 05:51:30,584 INFO L78 Accepts]: Start accepts. Automaton has 7849 states and 10809 transitions. Word has length 152 [2021-11-03 05:51:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:30,585 INFO L470 AbstractCegarLoop]: Abstraction has 7849 states and 10809 transitions. [2021-11-03 05:51:30,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:30,585 INFO L276 IsEmpty]: Start isEmpty. Operand 7849 states and 10809 transitions. [2021-11-03 05:51:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-03 05:51:30,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:30,589 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:51:30,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:30,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:31,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:51:31,005 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:51:31,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:31,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1896517377, now seen corresponding path program 1 times [2021-11-03 05:51:31,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:31,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721877966] [2021-11-03 05:51:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:31,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:31,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:31,013 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:31,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:51:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:39,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 4833 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:51:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:51:40,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:51:42,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:42,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721877966] [2021-11-03 05:51:42,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721877966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:51:42,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [433395530] [2021-11-03 05:51:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:42,554 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:51:42,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:51:42,554 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:51:42,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-03 05:51:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:48,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 4833 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:51:48,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:51:51,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:51:54,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [433395530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:54,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:51:54,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-03 05:51:54,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582596893] [2021-11-03 05:51:54,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:51:54,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:54,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:51:54,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:51:54,014 INFO L87 Difference]: Start difference. First operand 7849 states and 10809 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:54,935 INFO L93 Difference]: Finished difference Result 7849 states and 10809 transitions. [2021-11-03 05:51:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:51:54,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-03 05:51:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:54,948 INFO L225 Difference]: With dead ends: 7849 [2021-11-03 05:51:54,948 INFO L226 Difference]: Without dead ends: 7825 [2021-11-03 05:51:54,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 605 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:51:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7825 states. [2021-11-03 05:51:55,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7825 to 7825. [2021-11-03 05:51:55,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7825 states, 7818 states have (on average 1.3749040675364543) internal successors, (10749), 7824 states have internal predecessors, (10749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7825 states to 7825 states and 10749 transitions. [2021-11-03 05:51:55,205 INFO L78 Accepts]: Start accepts. Automaton has 7825 states and 10749 transitions. Word has length 154 [2021-11-03 05:51:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:55,206 INFO L470 AbstractCegarLoop]: Abstraction has 7825 states and 10749 transitions. [2021-11-03 05:51:55,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:55,206 INFO L276 IsEmpty]: Start isEmpty. Operand 7825 states and 10749 transitions. [2021-11-03 05:51:55,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-03 05:51:55,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:55,210 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:51:55,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:55,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:55,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:55,630 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:51:55,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1087316916, now seen corresponding path program 1 times [2021-11-03 05:51:55,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:55,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560345770] [2021-11-03 05:51:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:55,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:55,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:55,638 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:55,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:52:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:52:04,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 4851 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:52:04,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:52:06,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:52:07,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:52:07,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560345770] [2021-11-03 05:52:07,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560345770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:52:07,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1299936367] [2021-11-03 05:52:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:52:07,778 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:52:07,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:52:07,778 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:52:07,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-03 05:52:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:52:13,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 4851 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:52:13,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:52:14,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:52:15,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1299936367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:52:15,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:52:15,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-03 05:52:15,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225810243] [2021-11-03 05:52:15,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:52:15,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:52:15,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:52:15,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:52:15,527 INFO L87 Difference]: Start difference. First operand 7825 states and 10749 transitions. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:52:20,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:52:20,801 INFO L93 Difference]: Finished difference Result 15555 states and 21395 transitions. [2021-11-03 05:52:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:52:20,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-11-03 05:52:20,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:52:20,819 INFO L225 Difference]: With dead ends: 15555 [2021-11-03 05:52:20,819 INFO L226 Difference]: Without dead ends: 7825 [2021-11-03 05:52:20,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:52:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7825 states. [2021-11-03 05:52:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7825 to 7825. [2021-11-03 05:52:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7825 states, 7818 states have (on average 1.3746482476336659) internal successors, (10747), 7824 states have internal predecessors, (10747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:52:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7825 states to 7825 states and 10747 transitions. [2021-11-03 05:52:21,096 INFO L78 Accepts]: Start accepts. Automaton has 7825 states and 10747 transitions. Word has length 159 [2021-11-03 05:52:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:52:21,097 INFO L470 AbstractCegarLoop]: Abstraction has 7825 states and 10747 transitions. [2021-11-03 05:52:21,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:52:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 7825 states and 10747 transitions. [2021-11-03 05:52:21,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-03 05:52:21,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:52:21,103 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:52:21,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:52:21,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:52:21,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:52:21,517 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:52:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:52:21,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1104502042, now seen corresponding path program 1 times [2021-11-03 05:52:21,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:52:21,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992811200] [2021-11-03 05:52:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:52:21,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:52:21,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:52:21,526 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:52:21,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:52:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:52:30,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 4936 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:52:30,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:52:32,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:52:34,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:52:34,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992811200] [2021-11-03 05:52:34,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992811200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:52:34,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [779458732] [2021-11-03 05:52:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:52:34,249 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:52:34,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:52:34,250 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:52:34,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 05:52:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:52:40,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 4936 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:52:40,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:52:41,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:52:42,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [779458732] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:52:42,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:52:42,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-03 05:52:42,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815898311] [2021-11-03 05:52:42,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:52:42,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:52:42,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:52:42,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:52:42,225 INFO L87 Difference]: Start difference. First operand 7825 states and 10747 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:52:45,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:52:45,628 INFO L93 Difference]: Finished difference Result 15534 states and 21369 transitions. [2021-11-03 05:52:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:52:45,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-11-03 05:52:45,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:52:45,647 INFO L225 Difference]: With dead ends: 15534 [2021-11-03 05:52:45,647 INFO L226 Difference]: Without dead ends: 7800 [2021-11-03 05:52:45,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:52:45,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2021-11-03 05:52:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 7783. [2021-11-03 05:52:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7783 states, 7776 states have (on average 1.3759002057613168) internal successors, (10699), 7782 states have internal predecessors, (10699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:52:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7783 states to 7783 states and 10699 transitions. [2021-11-03 05:52:45,918 INFO L78 Accepts]: Start accepts. Automaton has 7783 states and 10699 transitions. Word has length 163 [2021-11-03 05:52:45,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:52:45,919 INFO L470 AbstractCegarLoop]: Abstraction has 7783 states and 10699 transitions. [2021-11-03 05:52:45,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:52:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 7783 states and 10699 transitions. [2021-11-03 05:52:45,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-03 05:52:45,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:52:45,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:52:45,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:52:46,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 05:52:46,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:52:46,353 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:52:46,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:52:46,354 INFO L85 PathProgramCache]: Analyzing trace with hash 943145502, now seen corresponding path program 1 times [2021-11-03 05:52:46,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:52:46,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282488079] [2021-11-03 05:52:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:52:46,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:52:46,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:52:46,362 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:52:46,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:52:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:52:55,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 4959 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:52:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:52:57,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:52:58,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:52:58,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282488079] [2021-11-03 05:52:58,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282488079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:52:58,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [894752077] [2021-11-03 05:52:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:52:58,900 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:52:58,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:52:58,901 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:52:58,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-03 05:53:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:53:05,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 4959 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:53:05,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:53:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:53:06,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:53:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:53:07,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [894752077] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:53:07,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:53:07,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-03 05:53:07,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547220426] [2021-11-03 05:53:07,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:53:07,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:53:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:53:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:53:07,129 INFO L87 Difference]: Start difference. First operand 7783 states and 10699 transitions. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:11,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:53:11,331 INFO L93 Difference]: Finished difference Result 20323 states and 28301 transitions. [2021-11-03 05:53:11,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:53:11,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have 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 [2021-11-03 05:53:11,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:53:11,366 INFO L225 Difference]: With dead ends: 20323 [2021-11-03 05:53:11,366 INFO L226 Difference]: Without dead ends: 12639 [2021-11-03 05:53:11,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 644 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:53:11,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12639 states. [2021-11-03 05:53:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12639 to 12599. [2021-11-03 05:53:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12599 states, 12592 states have (on average 1.3998570520965692) internal successors, (17627), 12598 states have internal predecessors, (17627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12599 states to 12599 states and 17627 transitions. [2021-11-03 05:53:11,804 INFO L78 Accepts]: Start accepts. Automaton has 12599 states and 17627 transitions. Word has length 164 [2021-11-03 05:53:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:53:11,805 INFO L470 AbstractCegarLoop]: Abstraction has 12599 states and 17627 transitions. [2021-11-03 05:53:11,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:11,805 INFO L276 IsEmpty]: Start isEmpty. Operand 12599 states and 17627 transitions. [2021-11-03 05:53:11,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-03 05:53:11,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:53:11,812 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:53:11,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:53:12,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:53:12,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:53:12,238 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:53:12,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:53:12,238 INFO L85 PathProgramCache]: Analyzing trace with hash 116833897, now seen corresponding path program 1 times [2021-11-03 05:53:12,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:53:12,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421432995] [2021-11-03 05:53:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:53:12,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:53:12,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:53:12,245 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:53:12,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:53:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:53:21,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 4990 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:53:21,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:53:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:53:23,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:53:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:53:25,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:53:25,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421432995] [2021-11-03 05:53:25,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421432995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:53:25,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1240667502] [2021-11-03 05:53:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:53:25,161 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:53:25,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:53:25,169 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:53:25,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 05:53:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:53:31,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 4990 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:53:31,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:53:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:53:32,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:53:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:53:33,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1240667502] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:53:33,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:53:33,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-03 05:53:33,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311301060] [2021-11-03 05:53:33,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:53:33,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:53:33,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:53:33,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:53:33,589 INFO L87 Difference]: Start difference. First operand 12599 states and 17627 transitions. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:40,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:53:40,489 INFO L93 Difference]: Finished difference Result 31667 states and 44451 transitions. [2021-11-03 05:53:40,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:53:40,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-03 05:53:40,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:53:40,524 INFO L225 Difference]: With dead ends: 31667 [2021-11-03 05:53:40,524 INFO L226 Difference]: Without dead ends: 19167 [2021-11-03 05:53:40,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:53:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19167 states. [2021-11-03 05:53:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19167 to 19087. [2021-11-03 05:53:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19087 states, 19080 states have (on average 1.3900943396226415) internal successors, (26523), 19086 states have internal predecessors, (26523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19087 states to 19087 states and 26523 transitions. [2021-11-03 05:53:41,081 INFO L78 Accepts]: Start accepts. Automaton has 19087 states and 26523 transitions. Word has length 170 [2021-11-03 05:53:41,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:53:41,081 INFO L470 AbstractCegarLoop]: Abstraction has 19087 states and 26523 transitions. [2021-11-03 05:53:41,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:41,082 INFO L276 IsEmpty]: Start isEmpty. Operand 19087 states and 26523 transitions. [2021-11-03 05:53:41,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-03 05:53:41,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:53:41,095 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:53:41,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:53:41,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-03 05:53:41,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:53:41,509 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:53:41,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:53:41,510 INFO L85 PathProgramCache]: Analyzing trace with hash 105899242, now seen corresponding path program 1 times [2021-11-03 05:53:41,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:53:41,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313984023] [2021-11-03 05:53:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:53:41,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:53:41,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:53:41,518 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:53:41,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:53:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:53:51,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 5068 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:53:51,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:53:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 05:53:53,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:53:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 05:53:55,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:53:55,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313984023] [2021-11-03 05:53:55,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313984023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:53:55,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [770774725] [2021-11-03 05:53:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:53:55,243 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:53:55,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:53:55,244 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:53:55,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 05:54:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:54:02,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 5068 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:54:02,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:54:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:54:03,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:54:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:54:04,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [770774725] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:54:04,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:54:04,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-03 05:54:04,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066611700] [2021-11-03 05:54:04,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:54:04,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:54:04,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:54:04,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:54:04,999 INFO L87 Difference]: Start difference. First operand 19087 states and 26523 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) [2021-11-03 05:54:08,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:54:08,653 INFO L93 Difference]: Finished difference Result 38154 states and 53052 transitions. [2021-11-03 05:54:08,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:54:08,654 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 190 [2021-11-03 05:54:08,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:54:08,683 INFO L225 Difference]: With dead ends: 38154 [2021-11-03 05:54:08,683 INFO L226 Difference]: Without dead ends: 19163 [2021-11-03 05:54:08,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 746 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:54:08,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19163 states. [2021-11-03 05:54:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19163 to 19087. [2021-11-03 05:54:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19087 states, 19080 states have (on average 1.390041928721174) internal successors, (26522), 19086 states have internal predecessors, (26522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:54:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19087 states to 19087 states and 26522 transitions. [2021-11-03 05:54:09,321 INFO L78 Accepts]: Start accepts. Automaton has 19087 states and 26522 transitions. Word has length 190 [2021-11-03 05:54:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:54:09,321 INFO L470 AbstractCegarLoop]: Abstraction has 19087 states and 26522 transitions. [2021-11-03 05:54:09,321 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) [2021-11-03 05:54:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 19087 states and 26522 transitions. [2021-11-03 05:54:09,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-03 05:54:09,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:54:09,335 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:54:09,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-03 05:54:09,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-03 05:54:09,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:54:09,761 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:54:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:54:09,761 INFO L85 PathProgramCache]: Analyzing trace with hash 993122088, now seen corresponding path program 1 times [2021-11-03 05:54:09,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:54:09,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550220575] [2021-11-03 05:54:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:54:09,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:54:09,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:54:09,770 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:54:09,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 05:54:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:54:20,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 5068 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:54:20,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:54:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 05:54:22,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:54:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 05:54:24,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:54:24,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550220575] [2021-11-03 05:54:24,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550220575] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:54:24,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [376094188] [2021-11-03 05:54:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:54:24,944 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:54:24,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:54:24,945 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:54:24,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-03 05:54:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:54:32,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 5068 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 05:54:32,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:54:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:54:35,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:54:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:54:37,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [376094188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:54:37,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:54:37,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-03 05:54:37,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705842087] [2021-11-03 05:54:37,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 05:54:37,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:54:37,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 05:54:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-03 05:54:37,901 INFO L87 Difference]: Start difference. First operand 19087 states and 26522 transitions. Second operand has 12 states, 12 states have (on average 15.416666666666666) internal successors, (185), 12 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:54:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:54:49,299 INFO L93 Difference]: Finished difference Result 55773 states and 77901 transitions. [2021-11-03 05:54:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:54:49,300 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.416666666666666) internal successors, (185), 12 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-11-03 05:54:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:54:49,353 INFO L225 Difference]: With dead ends: 55773 [2021-11-03 05:54:49,353 INFO L226 Difference]: Without dead ends: 36772 [2021-11-03 05:54:49,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 740 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-11-03 05:54:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36772 states. [2021-11-03 05:54:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36772 to 19087. [2021-11-03 05:54:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19087 states, 19080 states have (on average 1.3899895178197066) internal successors, (26521), 19086 states have internal predecessors, (26521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:54:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19087 states to 19087 states and 26521 transitions. [2021-11-03 05:54:50,229 INFO L78 Accepts]: Start accepts. Automaton has 19087 states and 26521 transitions. Word has length 190 [2021-11-03 05:54:50,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:54:50,229 INFO L470 AbstractCegarLoop]: Abstraction has 19087 states and 26521 transitions. [2021-11-03 05:54:50,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.416666666666666) internal successors, (185), 12 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:54:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 19087 states and 26521 transitions. [2021-11-03 05:54:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-03 05:54:50,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:54:50,239 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:54:50,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:54:50,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:54:50,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:54:50,666 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:54:50,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:54:50,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1780874352, now seen corresponding path program 1 times [2021-11-03 05:54:50,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:54:50,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042190739] [2021-11-03 05:54:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:54:50,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:54:50,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:54:50,679 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:54:50,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 05:55:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:55:01,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 5094 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:55:01,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:55:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 05:55:04,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:55:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 05:55:07,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:55:07,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042190739] [2021-11-03 05:55:07,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042190739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:55:07,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1650467330] [2021-11-03 05:55:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:55:07,122 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:55:07,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:55:07,123 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:55:07,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-03 05:55:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:55:14,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 5094 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:55:14,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:55:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 05:55:15,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:55:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 05:55:15,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1650467330] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:55:15,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:55:15,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-03 05:55:15,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943196042] [2021-11-03 05:55:15,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:55:15,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:55:15,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:55:15,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:55:15,858 INFO L87 Difference]: Start difference. First operand 19087 states and 26521 transitions. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:17,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:55:17,803 INFO L93 Difference]: Finished difference Result 33789 states and 47472 transitions. [2021-11-03 05:55:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:55:17,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-03 05:55:17,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:55:17,842 INFO L225 Difference]: With dead ends: 33789 [2021-11-03 05:55:17,842 INFO L226 Difference]: Without dead ends: 33779 [2021-11-03 05:55:17,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 780 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:55:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33779 states. [2021-11-03 05:55:18,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33779 to 19077. [2021-11-03 05:55:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19077 states, 19075 states have (on average 1.3879947575360418) internal successors, (26476), 19076 states have internal predecessors, (26476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19077 states to 19077 states and 26476 transitions. [2021-11-03 05:55:18,567 INFO L78 Accepts]: Start accepts. Automaton has 19077 states and 26476 transitions. Word has length 196 [2021-11-03 05:55:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:55:18,567 INFO L470 AbstractCegarLoop]: Abstraction has 19077 states and 26476 transitions. [2021-11-03 05:55:18,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 19077 states and 26476 transitions. [2021-11-03 05:55:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-03 05:55:18,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:55:18,586 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:55:18,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-03 05:55:18,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-03 05:55:18,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:55:18,987 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:55:18,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:55:18,988 INFO L85 PathProgramCache]: Analyzing trace with hash -435360243, now seen corresponding path program 1 times [2021-11-03 05:55:18,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:55:18,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930855213] [2021-11-03 05:55:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:55:18,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:55:18,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:55:18,998 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:55:19,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 05:55:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:55:29,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 5245 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:55:29,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:55:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-03 05:55:32,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:55:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-03 05:55:35,950 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:55:35,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930855213] [2021-11-03 05:55:35,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930855213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:55:35,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [102993522] [2021-11-03 05:55:35,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:55:35,951 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:55:35,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:55:35,952 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:55:35,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-03 05:55:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:55:43,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 5245 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:55:43,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:55:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-03 05:55:45,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:55:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-03 05:55:46,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [102993522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:55:46,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:55:46,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-03 05:55:46,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687697701] [2021-11-03 05:55:46,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:55:46,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:55:46,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:55:46,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:55:46,546 INFO L87 Difference]: Start difference. First operand 19077 states and 26476 transitions. Second operand has 6 states, 6 states have (on average 33.166666666666664) internal successors, (199), 6 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) [2021-11-03 05:55:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:55:55,148 INFO L93 Difference]: Finished difference Result 55105 states and 76218 transitions. [2021-11-03 05:55:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:55:55,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 33.166666666666664) internal successors, (199), 6 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 212 [2021-11-03 05:55:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:55:55,192 INFO L225 Difference]: With dead ends: 55105 [2021-11-03 05:55:55,192 INFO L226 Difference]: Without dead ends: 36127 [2021-11-03 05:55:55,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 836 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:55:55,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36127 states. [2021-11-03 05:55:56,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36127 to 19093. [2021-11-03 05:55:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19093 states, 19091 states have (on average 1.3876695825257974) internal successors, (26492), 19092 states have internal predecessors, (26492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19093 states to 19093 states and 26492 transitions. [2021-11-03 05:55:56,144 INFO L78 Accepts]: Start accepts. Automaton has 19093 states and 26492 transitions. Word has length 212 [2021-11-03 05:55:56,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:55:56,145 INFO L470 AbstractCegarLoop]: Abstraction has 19093 states and 26492 transitions. [2021-11-03 05:55:56,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.166666666666664) internal successors, (199), 6 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) [2021-11-03 05:55:56,145 INFO L276 IsEmpty]: Start isEmpty. Operand 19093 states and 26492 transitions. [2021-11-03 05:55:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-03 05:55:56,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:55:56,161 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:55:56,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-03 05:55:56,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 05:55:56,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:55:56,565 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:55:56,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:55:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash -488871854, now seen corresponding path program 1 times [2021-11-03 05:55:56,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:55:56,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806609552] [2021-11-03 05:55:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:55:56,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:55:56,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:55:56,574 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:55:56,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 05:56:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:56:07,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 5306 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:56:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:56:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-03 05:56:10,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:56:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-03 05:56:14,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:56:14,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806609552] [2021-11-03 05:56:14,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806609552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:56:14,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [664284170] [2021-11-03 05:56:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:56:14,364 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:56:14,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:56:14,365 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:56:14,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 05:56:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:56:22,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 5306 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:56:22,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:56:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-03 05:56:24,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:56:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-03 05:56:27,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [664284170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:56:27,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:56:27,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-03 05:56:27,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562315173] [2021-11-03 05:56:27,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:56:27,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:56:27,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:56:27,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:56:27,081 INFO L87 Difference]: Start difference. First operand 19093 states and 26492 transitions. Second operand has 8 states, 8 states have (on average 30.75) internal successors, (246), 8 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:56:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:56:40,282 INFO L93 Difference]: Finished difference Result 74737 states and 103778 transitions. [2021-11-03 05:56:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:56:40,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.75) internal successors, (246), 8 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2021-11-03 05:56:40,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:56:40,358 INFO L225 Difference]: With dead ends: 74737 [2021-11-03 05:56:40,358 INFO L226 Difference]: Without dead ends: 55743 [2021-11-03 05:56:40,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 947 GetRequests, 927 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-11-03 05:56:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55743 states. [2021-11-03 05:56:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55743 to 19317. [2021-11-03 05:56:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19317 states, 19315 states have (on average 1.3848304426611442) internal successors, (26748), 19316 states have internal predecessors, (26748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:56:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19317 states to 19317 states and 26748 transitions. [2021-11-03 05:56:41,589 INFO L78 Accepts]: Start accepts. Automaton has 19317 states and 26748 transitions. Word has length 235 [2021-11-03 05:56:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:56:41,589 INFO L470 AbstractCegarLoop]: Abstraction has 19317 states and 26748 transitions. [2021-11-03 05:56:41,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.75) internal successors, (246), 8 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:56:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 19317 states and 26748 transitions. [2021-11-03 05:56:41,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-03 05:56:41,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:56:41,610 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:56:41,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-03 05:56:41,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-03 05:56:42,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:56:42,012 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:56:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:56:42,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2120093765, now seen corresponding path program 1 times [2021-11-03 05:56:42,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:56:42,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874996294] [2021-11-03 05:56:42,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:56:42,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:56:42,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:56:42,021 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:56:42,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-03 05:56:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:56:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 5858 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:56:53,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:56:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-03 05:56:58,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:57:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-03 05:57:02,878 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:57:02,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874996294] [2021-11-03 05:57:02,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874996294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:57:02,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1144726942] [2021-11-03 05:57:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:57:02,878 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:57:02,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:57:02,879 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:57:02,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-03 05:57:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:57:11,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 5858 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:57:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:57:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:57:12,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:57:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:57:14,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1144726942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:57:14,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:57:14,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:57:14,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242372789] [2021-11-03 05:57:14,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:57:14,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:57:14,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:57:14,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:57:14,224 INFO L87 Difference]: Start difference. First operand 19317 states and 26748 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:57:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:57:21,057 INFO L93 Difference]: Finished difference Result 38559 states and 53437 transitions. [2021-11-03 05:57:21,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:57:21,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 313 [2021-11-03 05:57:21,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:57:21,080 INFO L225 Difference]: With dead ends: 38559 [2021-11-03 05:57:21,081 INFO L226 Difference]: Without dead ends: 19341 [2021-11-03 05:57:21,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1248 GetRequests, 1241 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:57:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19341 states. [2021-11-03 05:57:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19341 to 19341. [2021-11-03 05:57:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19341 states, 19339 states have (on average 1.3843528620921455) internal successors, (26772), 19340 states have internal predecessors, (26772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:57:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19341 states to 19341 states and 26772 transitions. [2021-11-03 05:57:22,108 INFO L78 Accepts]: Start accepts. Automaton has 19341 states and 26772 transitions. Word has length 313 [2021-11-03 05:57:22,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:57:22,108 INFO L470 AbstractCegarLoop]: Abstraction has 19341 states and 26772 transitions. [2021-11-03 05:57:22,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:57:22,109 INFO L276 IsEmpty]: Start isEmpty. Operand 19341 states and 26772 transitions. [2021-11-03 05:57:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-03 05:57:22,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:57:22,123 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:57:22,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-03 05:57:22,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-03 05:57:22,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:57:22,529 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:57:22,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:57:22,530 INFO L85 PathProgramCache]: Analyzing trace with hash 209051207, now seen corresponding path program 1 times [2021-11-03 05:57:22,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:57:22,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29644172] [2021-11-03 05:57:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:57:22,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:57:22,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:57:22,538 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:57:22,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-03 05:57:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:57:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 5860 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:57:34,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:57:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-03 05:57:38,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:57:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-03 05:57:43,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:57:43,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29644172] [2021-11-03 05:57:43,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29644172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:57:43,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [850330731] [2021-11-03 05:57:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:57:43,342 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:57:43,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:57:43,342 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:57:43,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-03 05:57:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:57:52,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 5860 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:57:52,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:57:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:57:55,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:57:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:57:58,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [850330731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:57:58,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:57:58,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-03 05:57:58,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155606088] [2021-11-03 05:57:58,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:57:58,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:57:58,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:57:58,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:57:58,752 INFO L87 Difference]: Start difference. First operand 19341 states and 26772 transitions. Second operand has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:58:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:58:02,166 INFO L93 Difference]: Finished difference Result 42173 states and 58556 transitions. [2021-11-03 05:58:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:58:02,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 313 [2021-11-03 05:58:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:58:02,193 INFO L225 Difference]: With dead ends: 42173 [2021-11-03 05:58:02,193 INFO L226 Difference]: Without dead ends: 22931 [2021-11-03 05:58:02,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1248 GetRequests, 1240 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:58:02,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22931 states. [2021-11-03 05:58:03,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22931 to 19541. [2021-11-03 05:58:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19541 states, 19539 states have (on average 1.384513025231588) internal successors, (27052), 19540 states have internal predecessors, (27052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:58:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19541 states to 19541 states and 27052 transitions. [2021-11-03 05:58:03,256 INFO L78 Accepts]: Start accepts. Automaton has 19541 states and 27052 transitions. Word has length 313 [2021-11-03 05:58:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:58:03,256 INFO L470 AbstractCegarLoop]: Abstraction has 19541 states and 27052 transitions. [2021-11-03 05:58:03,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:58:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 19541 states and 27052 transitions. [2021-11-03 05:58:03,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-03 05:58:03,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:58:03,269 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:58:03,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-03 05:58:03,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-03 05:58:03,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:58:03,675 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:58:03,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:58:03,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1034053782, now seen corresponding path program 1 times [2021-11-03 05:58:03,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:58:03,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082845311] [2021-11-03 05:58:03,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:58:03,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:58:03,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:58:03,692 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:58:03,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-03 05:58:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:58:15,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 5896 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:58:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:58:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-03 05:58:20,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:58:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-03 05:58:25,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:58:25,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082845311] [2021-11-03 05:58:25,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082845311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:58:25,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2020703276] [2021-11-03 05:58:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:58:25,031 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:58:25,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:58:25,032 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:58:25,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-03 05:58:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:58:33,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 5896 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:58:33,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:58:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:58:36,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:58:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:58:39,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2020703276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:58:39,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:58:39,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:58:39,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171419032] [2021-11-03 05:58:39,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:58:39,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:58:39,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:58:39,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:58:39,739 INFO L87 Difference]: Start difference. First operand 19541 states and 27052 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:58:43,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:58:43,202 INFO L93 Difference]: Finished difference Result 57001 states and 78926 transitions. [2021-11-03 05:58:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:58:43,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 319 [2021-11-03 05:58:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:58:43,246 INFO L225 Difference]: With dead ends: 57001 [2021-11-03 05:58:43,246 INFO L226 Difference]: Without dead ends: 37559 [2021-11-03 05:58:43,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1272 GetRequests, 1265 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:58:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37559 states. [2021-11-03 05:58:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37559 to 19541. [2021-11-03 05:58:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19541 states, 19539 states have (on average 1.384103587696402) internal successors, (27044), 19540 states have internal predecessors, (27044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:58:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19541 states to 19541 states and 27044 transitions. [2021-11-03 05:58:44,489 INFO L78 Accepts]: Start accepts. Automaton has 19541 states and 27044 transitions. Word has length 319 [2021-11-03 05:58:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:58:44,489 INFO L470 AbstractCegarLoop]: Abstraction has 19541 states and 27044 transitions. [2021-11-03 05:58:44,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:58:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 19541 states and 27044 transitions. [2021-11-03 05:58:44,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-03 05:58:44,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:58:44,502 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:58:44,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-03 05:58:44,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-03 05:58:44,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:58:44,904 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:58:44,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:58:44,905 INFO L85 PathProgramCache]: Analyzing trace with hash -794374770, now seen corresponding path program 1 times [2021-11-03 05:58:44,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:58:44,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877196926] [2021-11-03 05:58:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:58:44,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:58:44,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:58:44,930 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:58:44,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-03 05:58:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:58:57,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 5903 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:58:57,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:59:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-03 05:59:01,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:59:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-03 05:59:06,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:59:06,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877196926] [2021-11-03 05:59:06,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877196926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:59:06,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260642546] [2021-11-03 05:59:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:59:06,613 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:59:06,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:59:06,613 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:59:06,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-03 05:59:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:59:15,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 5903 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:59:15,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:59:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:59:18,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:59:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:59:20,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260642546] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:59:20,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:59:20,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:59:20,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923109648] [2021-11-03 05:59:20,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:59:20,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:59:20,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:59:20,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:59:20,993 INFO L87 Difference]: Start difference. First operand 19541 states and 27044 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:59:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:59:22,743 INFO L93 Difference]: Finished difference Result 38991 states and 53997 transitions. [2021-11-03 05:59:22,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:59:22,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-11-03 05:59:22,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:59:22,764 INFO L225 Difference]: With dead ends: 38991 [2021-11-03 05:59:22,764 INFO L226 Difference]: Without dead ends: 19549 [2021-11-03 05:59:22,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1280 GetRequests, 1273 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:59:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19549 states. [2021-11-03 05:59:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19549 to 19549. [2021-11-03 05:59:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19549 states, 19547 states have (on average 1.3839463856346241) internal successors, (27052), 19548 states have internal predecessors, (27052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:59:23,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19549 states to 19549 states and 27052 transitions. [2021-11-03 05:59:23,858 INFO L78 Accepts]: Start accepts. Automaton has 19549 states and 27052 transitions. Word has length 321 [2021-11-03 05:59:23,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:59:23,858 INFO L470 AbstractCegarLoop]: Abstraction has 19549 states and 27052 transitions. [2021-11-03 05:59:23,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:59:23,858 INFO L276 IsEmpty]: Start isEmpty. Operand 19549 states and 27052 transitions. [2021-11-03 05:59:23,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-03 05:59:23,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:59:23,877 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:59:23,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-03 05:59:24,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-03 05:59:24,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:59:24,280 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 05:59:24,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:59:24,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2117553716, now seen corresponding path program 1 times [2021-11-03 05:59:24,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:59:24,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481530521] [2021-11-03 05:59:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:59:24,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:59:24,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:59:24,312 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:59:24,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-03 05:59:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:59:37,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 5907 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:59:37,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:59:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-03 05:59:41,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:59:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-03 05:59:46,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:59:46,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481530521] [2021-11-03 05:59:46,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481530521] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:59:46,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1624633708] [2021-11-03 05:59:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:59:46,353 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:59:46,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:59:46,354 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:59:46,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-03 05:59:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:59:56,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 5907 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:59:56,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:59:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:59:59,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 06:00:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 06:00:02,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1624633708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 06:00:02,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 06:00:02,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-03 06:00:02,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807445009] [2021-11-03 06:00:02,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 06:00:02,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 06:00:02,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 06:00:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 06:00:02,669 INFO L87 Difference]: Start difference. First operand 19549 states and 27052 transitions. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 06:00:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 06:00:08,724 INFO L93 Difference]: Finished difference Result 76331 states and 105767 transitions. [2021-11-03 06:00:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 06:00:08,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-11-03 06:00:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 06:00:08,800 INFO L225 Difference]: With dead ends: 76331 [2021-11-03 06:00:08,800 INFO L226 Difference]: Without dead ends: 56881 [2021-11-03 06:00:08,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1280 GetRequests, 1272 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 06:00:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56881 states. [2021-11-03 06:00:10,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56881 to 22861. [2021-11-03 06:00:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22861 states, 22859 states have (on average 1.3734634060982545) internal successors, (31396), 22860 states have internal predecessors, (31396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 06:00:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22861 states to 22861 states and 31396 transitions. [2021-11-03 06:00:10,528 INFO L78 Accepts]: Start accepts. Automaton has 22861 states and 31396 transitions. Word has length 321 [2021-11-03 06:00:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 06:00:10,529 INFO L470 AbstractCegarLoop]: Abstraction has 22861 states and 31396 transitions. [2021-11-03 06:00:10,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 06:00:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 22861 states and 31396 transitions. [2021-11-03 06:00:10,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-03 06:00:10,559 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 06:00:10,559 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 06:00:10,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-03 06:00:10,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-03 06:00:10,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 06:00:10,971 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 16 more)] === [2021-11-03 06:00:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 06:00:10,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1470816974, now seen corresponding path program 1 times [2021-11-03 06:00:10,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 06:00:10,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817443855] [2021-11-03 06:00:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 06:00:10,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 06:00:10,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 06:00:10,986 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 06:00:10,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-03 06:00:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 06:00:24,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 5907 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 06:00:24,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 06:00:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-03 06:00:29,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 06:00:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-03 06:00:33,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 06:00:33,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817443855] [2021-11-03 06:00:33,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817443855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 06:00:33,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1783203967] [2021-11-03 06:00:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 06:00:33,892 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 06:00:33,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 06:00:33,893 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 06:00:33,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_168427c6-8f36-4d17-9d74-058a8a8ddebd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process