./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-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:56:53,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:56:53,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:56:53,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:56:53,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:56:53,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:56:53,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:56:53,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:56:53,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:56:53,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:56:53,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:56:53,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:56:53,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:56:53,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:56:53,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:56:53,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:56:53,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:56:53,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:56:53,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:56:53,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:56:53,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:56:53,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:56:53,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:56:53,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:56:53,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:56:53,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:56:53,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:56:53,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:56:53,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:56:53,238 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:56:53,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:56:53,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:56:53,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:56:53,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:56:53,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:56:53,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:56:53,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:56:53,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:56:53,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:56:53,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:56:53,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:56:53,251 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:56:53,293 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:56:53,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:56:53,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:56:53,295 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:56:53,295 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:56:53,295 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:56:53,295 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:56:53,296 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:56:53,296 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:56:53,296 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:56:53,297 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:56:53,297 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:56:53,297 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:56:53,298 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:56:53,298 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:56:53,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:56:53,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:56:53,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:56:53,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:56:53,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:56:53,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:56:53,300 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:56:53,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:56:53,300 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:56:53,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:56:53,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:56:53,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:56:53,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:56:53,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:56:53,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:56:53,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:56:53,303 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:56:53,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:56:53,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:56:53,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:56:53,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:56:53,304 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_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e [2021-11-07 01:56:53,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:56:53,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:56:53,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:56:53,641 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:56:53,641 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:56:53,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2021-11-07 01:56:53,724 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/data/0ffcc6fe0/4430dfbf3ac2469494e24e6e54297988/FLAG99a292637 [2021-11-07 01:56:54,517 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:56:54,518 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2021-11-07 01:56:54,568 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/data/0ffcc6fe0/4430dfbf3ac2469494e24e6e54297988/FLAG99a292637 [2021-11-07 01:56:55,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/data/0ffcc6fe0/4430dfbf3ac2469494e24e6e54297988 [2021-11-07 01:56:55,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:56:55,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:56:55,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:56:55,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:56:55,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:56:55,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:56:55" (1/1) ... [2021-11-07 01:56:55,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f965509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:55, skipping insertion in model container [2021-11-07 01:56:55,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:56:55" (1/1) ... [2021-11-07 01:56:55,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:56:55,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:56:56,513 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,523 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,579 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,579 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,654 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,697 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,720 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,734 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,748 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,763 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,781 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,786 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,786 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,818 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,823 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,873 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,874 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,874 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,882 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,883 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,883 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,884 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:56:56,905 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_f7f551ef-fffd-4cb8-8589-f13dee37b705/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2021-11-07 01:56:57,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:56:57,161 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:56:57,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f654218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:57, skipping insertion in model container [2021-11-07 01:56:57,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:56:57,162 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:56:57,164 INFO L168 Benchmark]: Toolchain (without parser) took 2103.69 ms. Allocated memory was 104.9 MB in the beginning and 140.5 MB in the end (delta: 35.7 MB). Free memory was 75.8 MB in the beginning and 84.1 MB in the end (delta: -8.3 MB). Peak memory consumption was 40.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:56:57,165 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 104.9 MB. Free memory is still 79.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:56:57,166 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2101.28 ms. Allocated memory was 104.9 MB in the beginning and 140.5 MB in the end (delta: 35.7 MB). Free memory was 75.5 MB in the beginning and 84.1 MB in the end (delta: -8.6 MB). Peak memory consumption was 40.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:56:57,168 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 104.9 MB. Free memory is still 79.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2101.28 ms. Allocated memory was 104.9 MB in the beginning and 140.5 MB in the end (delta: 35.7 MB). Free memory was 75.5 MB in the beginning and 84.1 MB in the end (delta: -8.6 MB). Peak memory consumption was 40.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4011]: 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_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:56:59,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:56:59,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:56:59,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:56:59,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:56:59,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:56:59,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:56:59,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:56:59,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:56:59,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:56:59,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:56:59,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:56:59,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:56:59,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:56:59,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:56:59,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:56:59,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:56:59,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:56:59,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:56:59,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:56:59,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:56:59,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:56:59,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:56:59,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:56:59,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:56:59,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:56:59,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:56:59,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:56:59,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:56:59,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:56:59,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:56:59,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:56:59,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:56:59,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:56:59,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:56:59,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:56:59,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:56:59,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:56:59,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:56:59,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:56:59,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:56:59,608 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:56:59,649 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:56:59,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:56:59,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:56:59,651 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:56:59,651 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:56:59,651 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:56:59,651 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:56:59,652 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:56:59,652 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:56:59,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:56:59,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:56:59,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:56:59,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:56:59,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:56:59,655 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:56:59,655 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:56:59,656 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:56:59,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:56:59,656 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:56:59,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:56:59,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:56:59,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:56:59,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:56:59,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:56:59,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:56:59,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:56:59,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:56:59,658 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:56:59,659 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:59,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:56:59,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:56:59,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:56:59,660 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_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e [2021-11-07 01:56:59,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:57:00,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:57:00,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:57:00,023 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:57:00,024 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:57:00,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2021-11-07 01:57:00,096 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/data/4810cf147/d9b99ec7dd1749aba8d8630c67562269/FLAG79fbd4b8d [2021-11-07 01:57:01,010 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:57:01,010 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2021-11-07 01:57:01,053 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/data/4810cf147/d9b99ec7dd1749aba8d8630c67562269/FLAG79fbd4b8d [2021-11-07 01:57:01,569 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/data/4810cf147/d9b99ec7dd1749aba8d8630c67562269 [2021-11-07 01:57:01,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:57:01,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:57:01,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:57:01,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:57:01,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:57:01,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:01" (1/1) ... [2021-11-07 01:57:01,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cba98ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:01, skipping insertion in model container [2021-11-07 01:57:01,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:01" (1/1) ... [2021-11-07 01:57:01,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:57:01,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:57:03,301 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_f7f551ef-fffd-4cb8-8589-f13dee37b705/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2021-11-07 01:57:03,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:57:03,630 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:57:03,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:57:03,971 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_f7f551ef-fffd-4cb8-8589-f13dee37b705/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2021-11-07 01:57:04,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:57:04,037 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:57:04,303 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_f7f551ef-fffd-4cb8-8589-f13dee37b705/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2021-11-07 01:57:04,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:57:04,460 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:57:04,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04 WrapperNode [2021-11-07 01:57:04,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:57:04,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:57:04,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:57:04,462 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:57:04,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:57:04,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:57:04,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:57:04,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:57:04,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:05,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:05,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:05,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:05,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:57:05,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:57:05,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:57:05,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:57:05,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:05,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:57:05,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:57:05,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:57:05,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:57:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:57:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:57:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:57:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:57:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:57:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:57:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:57:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:57:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:57:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:57:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:57:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:57:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:57:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:57:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:57:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:57:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:57:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:57:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:57:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:57:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:57:05,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:57:42,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:57:42,972 INFO L299 CfgBuilder]: Removed 1477 assume(true) statements. [2021-11-07 01:57:42,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:42 BoogieIcfgContainer [2021-11-07 01:57:42,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:57:42,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:57:42,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:57:42,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:57:42,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:57:01" (1/3) ... [2021-11-07 01:57:42,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655bc76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:42, skipping insertion in model container [2021-11-07 01:57:42,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (2/3) ... [2021-11-07 01:57:42,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655bc76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:42, skipping insertion in model container [2021-11-07 01:57:42,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:42" (3/3) ... [2021-11-07 01:57:42,985 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2021-11-07 01:57:42,991 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:57:42,991 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2021-11-07 01:57:43,047 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:57:43,053 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:57:43,053 INFO L340 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2021-11-07 01:57:43,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 1220 states, 1181 states have (on average 1.3742591024555462) internal successors, (1623), 1219 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:57:43,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:43,109 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] [2021-11-07 01:57:43,110 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:57:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:43,115 INFO L85 PathProgramCache]: Analyzing trace with hash -285552863, now seen corresponding path program 1 times [2021-11-07 01:57:43,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:43,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167565361] [2021-11-07 01:57:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:43,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:43,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:43,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:43,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:57:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:45,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:57:45,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:45,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:45,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:45,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167565361] [2021-11-07 01:57:45,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167565361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:45,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:45,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:57:45,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602473803] [2021-11-07 01:57:45,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:57:45,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:45,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:57:45,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:57:45,834 INFO L87 Difference]: Start difference. First operand has 1220 states, 1181 states have (on average 1.3742591024555462) internal successors, (1623), 1219 states have internal predecessors, (1623), 0 states have call successors, (0), 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 34.5) internal successors, (69), 2 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:45,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:45,930 INFO L93 Difference]: Finished difference Result 2436 states and 3241 transitions. [2021-11-07 01:57:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:57:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-07 01:57:45,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:45,956 INFO L225 Difference]: With dead ends: 2436 [2021-11-07 01:57:45,956 INFO L226 Difference]: Without dead ends: 1211 [2021-11-07 01:57:45,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:57:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-11-07 01:57:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1211. [2021-11-07 01:57:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1173 states have (on average 1.3213981244671782) internal successors, (1550), 1210 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1550 transitions. [2021-11-07 01:57:46,079 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1550 transitions. Word has length 69 [2021-11-07 01:57:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:46,079 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 1550 transitions. [2021-11-07 01:57:46,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:46,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1550 transitions. [2021-11-07 01:57:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:57:46,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:46,083 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] [2021-11-07 01:57:46,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:46,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:46,300 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:57:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:46,302 INFO L85 PathProgramCache]: Analyzing trace with hash 738566293, now seen corresponding path program 1 times [2021-11-07 01:57:46,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:46,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153403779] [2021-11-07 01:57:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:46,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:46,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:46,306 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:46,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:57:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:48,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:57:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:48,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:48,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:48,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153403779] [2021-11-07 01:57:48,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153403779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:48,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:48,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:57:48,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051866147] [2021-11-07 01:57:48,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:48,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:48,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:48,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:48,798 INFO L87 Difference]: Start difference. First operand 1211 states and 1550 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:49,169 INFO L93 Difference]: Finished difference Result 2404 states and 3095 transitions. [2021-11-07 01:57:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:57:49,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 69 [2021-11-07 01:57:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:49,178 INFO L225 Difference]: With dead ends: 2404 [2021-11-07 01:57:49,178 INFO L226 Difference]: Without dead ends: 1225 [2021-11-07 01:57:49,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-11-07 01:57:49,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1225. [2021-11-07 01:57:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1187 states have (on average 1.3176074136478517) internal successors, (1564), 1224 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1564 transitions. [2021-11-07 01:57:49,221 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1564 transitions. Word has length 69 [2021-11-07 01:57:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:49,221 INFO L470 AbstractCegarLoop]: Abstraction has 1225 states and 1564 transitions. [2021-11-07 01:57:49,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1564 transitions. [2021-11-07 01:57:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:57:49,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:49,226 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:57:49,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:57:49,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:49,441 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:57:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:49,441 INFO L85 PathProgramCache]: Analyzing trace with hash 109106869, now seen corresponding path program 1 times [2021-11-07 01:57:49,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:49,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208565525] [2021-11-07 01:57:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:49,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:49,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:49,446 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:49,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:57:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:51,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:57:51,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:57:51,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:57:52,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:52,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208565525] [2021-11-07 01:57:52,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208565525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:52,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1779721228] [2021-11-07 01:57:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:52,445 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:52,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:57:52,450 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:57:52,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 01:57:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:53,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:53,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:57:54,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:57:54,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1779721228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:54,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:57:54,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:57:54,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152156941] [2021-11-07 01:57:54,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:54,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:54,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:54,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:57:54,893 INFO L87 Difference]: Start difference. First operand 1225 states and 1564 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:54,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:54,939 INFO L93 Difference]: Finished difference Result 1225 states and 1564 transitions. [2021-11-07 01:57:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:54,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:57:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:54,950 INFO L225 Difference]: With dead ends: 1225 [2021-11-07 01:57:54,950 INFO L226 Difference]: Without dead ends: 1223 [2021-11-07 01:57:54,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:57:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-11-07 01:57:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1223. [2021-11-07 01:57:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 1186 states have (on average 1.3170320404721754) internal successors, (1562), 1222 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1562 transitions. [2021-11-07 01:57:55,001 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1562 transitions. Word has length 83 [2021-11-07 01:57:55,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:55,001 INFO L470 AbstractCegarLoop]: Abstraction has 1223 states and 1562 transitions. [2021-11-07 01:57:55,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:55,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1562 transitions. [2021-11-07 01:57:55,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:57:55,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:55,008 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:57:55,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:55,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:55,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:55,432 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:57:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:55,433 INFO L85 PathProgramCache]: Analyzing trace with hash -912644499, now seen corresponding path program 1 times [2021-11-07 01:57:55,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:55,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407757565] [2021-11-07 01:57:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:55,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:55,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:55,436 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:55,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:57:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:57,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:57:57,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:57:57,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:57:58,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:58,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407757565] [2021-11-07 01:57:58,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407757565] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:58,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1636137857] [2021-11-07 01:57:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:58,289 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:58,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:57:58,296 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:57:58,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 01:57:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:59,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:59,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:00,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:00,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1636137857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:00,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:00,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:58:00,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933810880] [2021-11-07 01:58:00,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:00,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:00,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:00,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:00,613 INFO L87 Difference]: Start difference. First operand 1223 states and 1562 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:00,664 INFO L93 Difference]: Finished difference Result 1223 states and 1562 transitions. [2021-11-07 01:58:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:00,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:58:00,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:00,675 INFO L225 Difference]: With dead ends: 1223 [2021-11-07 01:58:00,675 INFO L226 Difference]: Without dead ends: 1221 [2021-11-07 01:58:00,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-11-07 01:58:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2021-11-07 01:58:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1185 states have (on average 1.3164556962025316) internal successors, (1560), 1220 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1560 transitions. [2021-11-07 01:58:00,738 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1560 transitions. Word has length 84 [2021-11-07 01:58:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:00,740 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 1560 transitions. [2021-11-07 01:58:00,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:00,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1560 transitions. [2021-11-07 01:58:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:58:00,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:00,743 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:58:00,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:00,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-07 01:58:01,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:01,164 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:58:01,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:01,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1037025069, now seen corresponding path program 1 times [2021-11-07 01:58:01,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:01,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204602439] [2021-11-07 01:58:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:01,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:01,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:01,167 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:01,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:58:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:03,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:58:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:58:03,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:58:04,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:04,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204602439] [2021-11-07 01:58:04,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204602439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:04,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [140551511] [2021-11-07 01:58:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:04,052 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:04,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:04,053 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:04,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 01:58:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:05,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:05,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:05,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:05,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [140551511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:05,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:05,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:58:05,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004722410] [2021-11-07 01:58:05,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:05,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:05,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:05,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:05,870 INFO L87 Difference]: Start difference. First operand 1221 states and 1560 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:06,439 INFO L93 Difference]: Finished difference Result 2930 states and 3743 transitions. [2021-11-07 01:58:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:06,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:58:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:06,451 INFO L225 Difference]: With dead ends: 2930 [2021-11-07 01:58:06,451 INFO L226 Difference]: Without dead ends: 1782 [2021-11-07 01:58:06,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:06,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-11-07 01:58:06,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1734. [2021-11-07 01:58:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1698 states have (on average 1.3150765606595995) internal successors, (2233), 1733 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2233 transitions. [2021-11-07 01:58:06,545 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2233 transitions. Word has length 84 [2021-11-07 01:58:06,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:06,546 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 2233 transitions. [2021-11-07 01:58:06,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2233 transitions. [2021-11-07 01:58:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:58:06,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:06,553 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:58:06,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:06,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:06,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:06,976 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:58:06,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:06,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1772801471, now seen corresponding path program 1 times [2021-11-07 01:58:06,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:06,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147697553] [2021-11-07 01:58:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:06,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:06,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:06,979 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:06,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:58:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:09,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:58:09,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:58:09,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:58:09,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:09,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147697553] [2021-11-07 01:58:09,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147697553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:09,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1048464301] [2021-11-07 01:58:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:09,925 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:09,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:09,926 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:09,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:58:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:11,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:11,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:11,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:12,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1048464301] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:12,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:12,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:58:12,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687788915] [2021-11-07 01:58:12,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:12,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:12,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:12,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:12,460 INFO L87 Difference]: Start difference. First operand 1734 states and 2233 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:12,530 INFO L93 Difference]: Finished difference Result 1734 states and 2233 transitions. [2021-11-07 01:58:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:12,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 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 85 [2021-11-07 01:58:12,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:12,540 INFO L225 Difference]: With dead ends: 1734 [2021-11-07 01:58:12,540 INFO L226 Difference]: Without dead ends: 1732 [2021-11-07 01:58:12,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-11-07 01:58:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1732. [2021-11-07 01:58:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1697 states have (on average 1.3146729522687095) internal successors, (2231), 1731 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2231 transitions. [2021-11-07 01:58:12,626 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2231 transitions. Word has length 85 [2021-11-07 01:58:12,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:12,627 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 2231 transitions. [2021-11-07 01:58:12,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2231 transitions. [2021-11-07 01:58:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:58:12,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:12,629 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:58:12,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:12,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:13,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:13,052 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:58:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:13,052 INFO L85 PathProgramCache]: Analyzing trace with hash -877719369, now seen corresponding path program 1 times [2021-11-07 01:58:13,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:13,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875430328] [2021-11-07 01:58:13,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:13,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:13,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:13,055 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:13,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:58:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:15,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:58:15,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:58:15,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:58:16,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:16,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875430328] [2021-11-07 01:58:16,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875430328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:16,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [768679058] [2021-11-07 01:58:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:16,064 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:16,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:16,064 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:16,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:58:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:17,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:18,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:18,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [768679058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:18,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:18,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:58:18,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694139841] [2021-11-07 01:58:18,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:18,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:18,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:18,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:18,629 INFO L87 Difference]: Start difference. First operand 1732 states and 2231 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:18,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:18,836 INFO L93 Difference]: Finished difference Result 4806 states and 6257 transitions. [2021-11-07 01:58:18,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:18,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:58:18,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:18,854 INFO L225 Difference]: With dead ends: 4806 [2021-11-07 01:58:18,854 INFO L226 Difference]: Without dead ends: 3147 [2021-11-07 01:58:18,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:18,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-11-07 01:58:19,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 3104. [2021-11-07 01:58:19,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3069 states have (on average 1.3268165526230042) internal successors, (4072), 3103 states have internal predecessors, (4072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 4072 transitions. [2021-11-07 01:58:19,019 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 4072 transitions. Word has length 86 [2021-11-07 01:58:19,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:19,020 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 4072 transitions. [2021-11-07 01:58:19,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:19,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 4072 transitions. [2021-11-07 01:58:19,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:58:19,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:19,021 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:58:19,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:58:19,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:19,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:19,444 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:58:19,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:19,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1439486775, now seen corresponding path program 1 times [2021-11-07 01:58:19,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:19,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910520653] [2021-11-07 01:58:19,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:19,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:19,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:19,447 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:19,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:58:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:21,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1389 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:58:21,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:58:22,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:58:22,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:22,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910520653] [2021-11-07 01:58:22,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910520653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:22,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [193135423] [2021-11-07 01:58:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:22,530 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:22,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:22,531 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:22,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:58:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:24,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1389 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:24,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:24,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:25,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [193135423] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:25,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:25,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:58:25,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489513783] [2021-11-07 01:58:25,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:25,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:25,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:25,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:25,259 INFO L87 Difference]: Start difference. First operand 3104 states and 4072 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:25,457 INFO L93 Difference]: Finished difference Result 3104 states and 4072 transitions. [2021-11-07 01:58:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:25,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-07 01:58:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:25,472 INFO L225 Difference]: With dead ends: 3104 [2021-11-07 01:58:25,472 INFO L226 Difference]: Without dead ends: 3094 [2021-11-07 01:58:25,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3094 states. [2021-11-07 01:58:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3094 to 3094. [2021-11-07 01:58:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3094 states, 3064 states have (on average 1.323107049608355) internal successors, (4054), 3093 states have internal predecessors, (4054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3094 states to 3094 states and 4054 transitions. [2021-11-07 01:58:25,636 INFO L78 Accepts]: Start accepts. Automaton has 3094 states and 4054 transitions. Word has length 87 [2021-11-07 01:58:25,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:25,637 INFO L470 AbstractCegarLoop]: Abstraction has 3094 states and 4054 transitions. [2021-11-07 01:58:25,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3094 states and 4054 transitions. [2021-11-07 01:58:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:58:25,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:25,639 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:58:25,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:25,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:58:26,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:26,058 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:58:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:26,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1674407167, now seen corresponding path program 1 times [2021-11-07 01:58:26,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:26,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658584917] [2021-11-07 01:58:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:26,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:26,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:26,061 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:26,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:58:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:28,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1390 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:58:28,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:58:28,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:58:29,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:29,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658584917] [2021-11-07 01:58:29,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658584917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:29,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2089060096] [2021-11-07 01:58:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:29,251 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:29,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:29,252 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:29,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:58:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:30,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1390 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:31,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:31,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:31,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2089060096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:31,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:31,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:58:31,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59965306] [2021-11-07 01:58:31,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:31,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:31,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:31,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:31,908 INFO L87 Difference]: Start difference. First operand 3094 states and 4054 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:32,240 INFO L93 Difference]: Finished difference Result 8738 states and 11542 transitions. [2021-11-07 01:58:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:32,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 01:58:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:32,273 INFO L225 Difference]: With dead ends: 8738 [2021-11-07 01:58:32,273 INFO L226 Difference]: Without dead ends: 5709 [2021-11-07 01:58:32,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5709 states. [2021-11-07 01:58:32,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5709 to 5475. [2021-11-07 01:58:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5475 states, 5445 states have (on average 1.3287419651056014) internal successors, (7235), 5474 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:32,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5475 states to 5475 states and 7235 transitions. [2021-11-07 01:58:32,582 INFO L78 Accepts]: Start accepts. Automaton has 5475 states and 7235 transitions. Word has length 88 [2021-11-07 01:58:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:32,583 INFO L470 AbstractCegarLoop]: Abstraction has 5475 states and 7235 transitions. [2021-11-07 01:58:32,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:32,583 INFO L276 IsEmpty]: Start isEmpty. Operand 5475 states and 7235 transitions. [2021-11-07 01:58:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 01:58:32,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:32,585 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:58:32,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:32,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:32,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:32,997 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:58:32,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:32,998 INFO L85 PathProgramCache]: Analyzing trace with hash 884083242, now seen corresponding path program 1 times [2021-11-07 01:58:32,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:32,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858665779] [2021-11-07 01:58:32,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:33,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:33,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:33,001 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:33,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:58:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:35,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:58:35,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:58:35,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:58:36,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:36,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858665779] [2021-11-07 01:58:36,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858665779] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:36,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1641228519] [2021-11-07 01:58:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:36,566 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:36,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:36,567 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:36,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:58:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:38,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:38,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:38,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:38,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1641228519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:38,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:38,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:58:38,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840474039] [2021-11-07 01:58:38,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:38,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:38,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:38,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:38,994 INFO L87 Difference]: Start difference. First operand 5475 states and 7235 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:39,642 INFO L93 Difference]: Finished difference Result 13716 states and 18287 transitions. [2021-11-07 01:58:39,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:39,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 101 [2021-11-07 01:58:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:39,704 INFO L225 Difference]: With dead ends: 13716 [2021-11-07 01:58:39,704 INFO L226 Difference]: Without dead ends: 8314 [2021-11-07 01:58:39,715 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8314 states. [2021-11-07 01:58:40,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8314 to 8049. [2021-11-07 01:58:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8049 states, 8019 states have (on average 1.3469260506297542) internal successors, (10801), 8048 states have internal predecessors, (10801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8049 states to 8049 states and 10801 transitions. [2021-11-07 01:58:40,044 INFO L78 Accepts]: Start accepts. Automaton has 8049 states and 10801 transitions. Word has length 101 [2021-11-07 01:58:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:40,045 INFO L470 AbstractCegarLoop]: Abstraction has 8049 states and 10801 transitions. [2021-11-07 01:58:40,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 8049 states and 10801 transitions. [2021-11-07 01:58:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:58:40,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:40,049 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] [2021-11-07 01:58:40,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:40,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:58:40,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:40,464 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:58:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2043118678, now seen corresponding path program 1 times [2021-11-07 01:58:40,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:40,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292311359] [2021-11-07 01:58:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:40,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:40,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:40,468 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:40,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:58:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:43,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1563 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:58:43,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:43,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:44,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:44,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292311359] [2021-11-07 01:58:44,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292311359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:44,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [515563281] [2021-11-07 01:58:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:44,264 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:44,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:44,265 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:44,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:58:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:46,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1563 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:46,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:46,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:46,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [515563281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:46,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:46,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:58:46,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520069816] [2021-11-07 01:58:46,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:46,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:46,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:46,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:46,943 INFO L87 Difference]: Start difference. First operand 8049 states and 10801 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:49,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:49,503 INFO L93 Difference]: Finished difference Result 16047 states and 21544 transitions. [2021-11-07 01:58:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:49,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 [2021-11-07 01:58:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:49,522 INFO L225 Difference]: With dead ends: 16047 [2021-11-07 01:58:49,523 INFO L226 Difference]: Without dead ends: 8069 [2021-11-07 01:58:49,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8069 states. [2021-11-07 01:58:49,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8069 to 8012. [2021-11-07 01:58:49,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8012 states, 7982 states have (on average 1.3475319468804812) internal successors, (10756), 8011 states have internal predecessors, (10756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8012 states to 8012 states and 10756 transitions. [2021-11-07 01:58:49,950 INFO L78 Accepts]: Start accepts. Automaton has 8012 states and 10756 transitions. Word has length 118 [2021-11-07 01:58:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:49,951 INFO L470 AbstractCegarLoop]: Abstraction has 8012 states and 10756 transitions. [2021-11-07 01:58:49,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:49,951 INFO L276 IsEmpty]: Start isEmpty. Operand 8012 states and 10756 transitions. [2021-11-07 01:58:49,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 01:58:49,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:49,955 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] [2021-11-07 01:58:49,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:50,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:50,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:50,372 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:58:50,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:50,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1122513076, now seen corresponding path program 1 times [2021-11-07 01:58:50,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:50,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055601774] [2021-11-07 01:58:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:50,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:50,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:50,376 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:50,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:58:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:53,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1576 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:58:53,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:53,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:58:54,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:54,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055601774] [2021-11-07 01:58:54,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055601774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:54,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1754851496] [2021-11-07 01:58:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:54,065 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:54,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:54,067 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:54,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:58:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:56,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 1576 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:56,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:58:56,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:58:56,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1754851496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:56,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:56,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:58:56,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461088222] [2021-11-07 01:58:56,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:56,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:56,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:56,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:56,773 INFO L87 Difference]: Start difference. First operand 8012 states and 10756 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:59,315 INFO L93 Difference]: Finished difference Result 16045 states and 21554 transitions. [2021-11-07 01:58:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:59,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 121 [2021-11-07 01:58:59,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:59,335 INFO L225 Difference]: With dead ends: 16045 [2021-11-07 01:58:59,335 INFO L226 Difference]: Without dead ends: 8106 [2021-11-07 01:58:59,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:59,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8106 states. [2021-11-07 01:58:59,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8106 to 7880. [2021-11-07 01:58:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7880 states, 7854 states have (on average 1.3450471097529921) internal successors, (10564), 7879 states have internal predecessors, (10564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7880 states to 7880 states and 10564 transitions. [2021-11-07 01:58:59,713 INFO L78 Accepts]: Start accepts. Automaton has 7880 states and 10564 transitions. Word has length 121 [2021-11-07 01:58:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:59,714 INFO L470 AbstractCegarLoop]: Abstraction has 7880 states and 10564 transitions. [2021-11-07 01:58:59,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 7880 states and 10564 transitions. [2021-11-07 01:58:59,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 01:58:59,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:59,718 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] [2021-11-07 01:58:59,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:59,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:00,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:00,131 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:59:00,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1420764211, now seen corresponding path program 1 times [2021-11-07 01:59:00,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:00,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491861720] [2021-11-07 01:59:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:00,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:00,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:00,134 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:00,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:59:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:03,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:59:03,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:59:03,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:59:04,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:04,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491861720] [2021-11-07 01:59:04,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491861720] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:04,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1670172007] [2021-11-07 01:59:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:04,251 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:59:04,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:59:04,252 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:59:04,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:59:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:06,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:59:06,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:59:06,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:59:07,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1670172007] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:07,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:59:07,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:59:07,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20883479] [2021-11-07 01:59:07,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:07,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:07,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:07,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:59:07,291 INFO L87 Difference]: Start difference. First operand 7880 states and 10564 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:10,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:10,392 INFO L93 Difference]: Finished difference Result 20631 states and 27804 transitions. [2021-11-07 01:59:10,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:59:10,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 121 [2021-11-07 01:59:10,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:10,423 INFO L225 Difference]: With dead ends: 20631 [2021-11-07 01:59:10,423 INFO L226 Difference]: Without dead ends: 12824 [2021-11-07 01:59:10,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:59:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12824 states. [2021-11-07 01:59:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12824 to 12450. [2021-11-07 01:59:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12450 states, 12424 states have (on average 1.3504507405022537) internal successors, (16778), 12449 states have internal predecessors, (16778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12450 states to 12450 states and 16778 transitions. [2021-11-07 01:59:10,990 INFO L78 Accepts]: Start accepts. Automaton has 12450 states and 16778 transitions. Word has length 121 [2021-11-07 01:59:10,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:10,991 INFO L470 AbstractCegarLoop]: Abstraction has 12450 states and 16778 transitions. [2021-11-07 01:59:10,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:10,991 INFO L276 IsEmpty]: Start isEmpty. Operand 12450 states and 16778 transitions. [2021-11-07 01:59:10,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 01:59:10,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:10,994 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, 1] [2021-11-07 01:59:11,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-07 01:59:11,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:11,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:11,408 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:59:11,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:11,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1230845283, now seen corresponding path program 1 times [2021-11-07 01:59:11,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:11,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175689748] [2021-11-07 01:59:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:11,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:11,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:11,411 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:11,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:59:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:14,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:59:14,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:59:14,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:59:15,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:15,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175689748] [2021-11-07 01:59:15,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175689748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:15,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [516495564] [2021-11-07 01:59:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:15,316 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:59:15,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:59:15,322 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:59:15,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:59:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:17,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:59:17,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:59:18,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:59:18,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [516495564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:18,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:59:18,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:59:18,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579107535] [2021-11-07 01:59:18,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:18,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:18,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:18,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:59:18,329 INFO L87 Difference]: Start difference. First operand 12450 states and 16778 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:20,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:20,925 INFO L93 Difference]: Finished difference Result 12450 states and 16778 transitions. [2021-11-07 01:59:20,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:20,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 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 124 [2021-11-07 01:59:20,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:20,961 INFO L225 Difference]: With dead ends: 12450 [2021-11-07 01:59:20,961 INFO L226 Difference]: Without dead ends: 12442 [2021-11-07 01:59:20,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:59:20,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12442 states. [2021-11-07 01:59:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12442 to 12442. [2021-11-07 01:59:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12442 states, 12420 states have (on average 1.3489533011272141) internal successors, (16754), 12441 states have internal predecessors, (16754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12442 states to 12442 states and 16754 transitions. [2021-11-07 01:59:21,642 INFO L78 Accepts]: Start accepts. Automaton has 12442 states and 16754 transitions. Word has length 124 [2021-11-07 01:59:21,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:21,643 INFO L470 AbstractCegarLoop]: Abstraction has 12442 states and 16754 transitions. [2021-11-07 01:59:21,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:21,643 INFO L276 IsEmpty]: Start isEmpty. Operand 12442 states and 16754 transitions. [2021-11-07 01:59:21,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 01:59:21,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:21,646 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, 1, 1, 1] [2021-11-07 01:59:21,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-07 01:59:21,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:22,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:22,060 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:59:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:22,060 INFO L85 PathProgramCache]: Analyzing trace with hash 985493973, now seen corresponding path program 1 times [2021-11-07 01:59:22,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:22,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775670674] [2021-11-07 01:59:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:22,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:22,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:22,063 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:22,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:59:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:25,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 1619 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:59:25,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:59:25,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:59:26,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:26,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775670674] [2021-11-07 01:59:26,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775670674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:26,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [438221215] [2021-11-07 01:59:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:26,413 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:59:26,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:59:26,419 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:59:26,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:59:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:29,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1619 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:59:29,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:59:29,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:59:29,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [438221215] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:29,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:59:29,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:59:29,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545580536] [2021-11-07 01:59:29,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:29,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:29,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:29,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:59:29,836 INFO L87 Difference]: Start difference. First operand 12442 states and 16754 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:32,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:32,896 INFO L93 Difference]: Finished difference Result 33179 states and 45219 transitions. [2021-11-07 01:59:32,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:59:32,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 126 [2021-11-07 01:59:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:32,921 INFO L225 Difference]: With dead ends: 33179 [2021-11-07 01:59:32,921 INFO L226 Difference]: Without dead ends: 20810 [2021-11-07 01:59:32,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:59:32,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20810 states. [2021-11-07 01:59:33,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20810 to 20302. [2021-11-07 01:59:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20302 states, 20280 states have (on average 1.3691321499013807) internal successors, (27766), 20301 states have internal predecessors, (27766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20302 states to 20302 states and 27766 transitions. [2021-11-07 01:59:33,791 INFO L78 Accepts]: Start accepts. Automaton has 20302 states and 27766 transitions. Word has length 126 [2021-11-07 01:59:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:33,791 INFO L470 AbstractCegarLoop]: Abstraction has 20302 states and 27766 transitions. [2021-11-07 01:59:33,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 20302 states and 27766 transitions. [2021-11-07 01:59:33,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-07 01:59:33,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:33,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:33,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:34,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:34,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:59:34,212 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:59:34,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:34,212 INFO L85 PathProgramCache]: Analyzing trace with hash -317588352, now seen corresponding path program 1 times [2021-11-07 01:59:34,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:34,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812222141] [2021-11-07 01:59:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:34,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:34,215 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:34,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:59:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:37,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:59:37,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:59:37,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:59:38,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:38,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812222141] [2021-11-07 01:59:38,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812222141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:38,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2121473444] [2021-11-07 01:59:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:38,545 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:59:38,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:59:38,546 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:59:38,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:59:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:41,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:59:41,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:59:41,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:59:42,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2121473444] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:42,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:59:42,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:59:42,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424984064] [2021-11-07 01:59:42,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:59:42,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:42,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:59:42,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:59:42,071 INFO L87 Difference]: Start difference. First operand 20302 states and 27766 transitions. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:46,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:46,858 INFO L93 Difference]: Finished difference Result 93452 states and 128064 transitions. [2021-11-07 01:59:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:59:46,859 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 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 133 [2021-11-07 01:59:46,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:47,011 INFO L225 Difference]: With dead ends: 93452 [2021-11-07 01:59:47,011 INFO L226 Difference]: Without dead ends: 93324 [2021-11-07 01:59:47,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:59:47,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93324 states. [2021-11-07 01:59:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93324 to 20174. [2021-11-07 01:59:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20174 states, 20156 states have (on average 1.3685255010914863) internal successors, (27584), 20173 states have internal predecessors, (27584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20174 states to 20174 states and 27584 transitions. [2021-11-07 01:59:49,014 INFO L78 Accepts]: Start accepts. Automaton has 20174 states and 27584 transitions. Word has length 133 [2021-11-07 01:59:49,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:49,014 INFO L470 AbstractCegarLoop]: Abstraction has 20174 states and 27584 transitions. [2021-11-07 01:59:49,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:49,014 INFO L276 IsEmpty]: Start isEmpty. Operand 20174 states and 27584 transitions. [2021-11-07 01:59:49,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-07 01:59:49,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:49,018 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:59:49,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:49,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:49,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:49,432 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 01:59:49,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:49,434 INFO L85 PathProgramCache]: Analyzing trace with hash -676718706, now seen corresponding path program 1 times [2021-11-07 01:59:49,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:49,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310612499] [2021-11-07 01:59:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:49,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:49,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:49,437 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:49,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:59:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:52,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:59:52,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:59:53,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:59:53,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:53,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310612499] [2021-11-07 01:59:53,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310612499] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:53,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [651368591] [2021-11-07 01:59:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:53,934 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:59:53,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:59:53,935 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:59:53,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 01:59:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:56,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:59:56,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:59:57,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:59:57,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [651368591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:57,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:59:57,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:59:57,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569133400] [2021-11-07 01:59:57,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:59:57,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:57,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:59:57,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:59:57,743 INFO L87 Difference]: Start difference. First operand 20174 states and 27584 transitions. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:03,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:03,019 INFO L93 Difference]: Finished difference Result 52889 states and 71964 transitions. [2021-11-07 02:00:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:00:03,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 138 [2021-11-07 02:00:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:03,071 INFO L225 Difference]: With dead ends: 52889 [2021-11-07 02:00:03,071 INFO L226 Difference]: Without dead ends: 32788 [2021-11-07 02:00:03,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-07 02:00:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32788 states. [2021-11-07 02:00:04,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32788 to 20222. [2021-11-07 02:00:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20222 states, 20204 states have (on average 1.3676499703029104) internal successors, (27632), 20221 states have internal predecessors, (27632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20222 states to 20222 states and 27632 transitions. [2021-11-07 02:00:04,579 INFO L78 Accepts]: Start accepts. Automaton has 20222 states and 27632 transitions. Word has length 138 [2021-11-07 02:00:04,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:04,580 INFO L470 AbstractCegarLoop]: Abstraction has 20222 states and 27632 transitions. [2021-11-07 02:00:04,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 20222 states and 27632 transitions. [2021-11-07 02:00:04,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-07 02:00:04,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:04,584 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-07 02:00:04,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-07 02:00:04,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:04,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:04,998 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 02:00:04,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:04,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1034864155, now seen corresponding path program 1 times [2021-11-07 02:00:05,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:05,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266251978] [2021-11-07 02:00:05,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:05,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:05,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:05,001 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:05,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 02:00:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:08,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:00:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 02:00:08,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 02:00:09,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:09,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266251978] [2021-11-07 02:00:09,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266251978] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:00:09,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [31689610] [2021-11-07 02:00:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:09,680 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:00:09,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:00:09,681 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:00:09,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 02:00:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:12,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:00:12,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:00:13,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:00:13,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [31689610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:13,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:00:13,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 02:00:13,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779859622] [2021-11-07 02:00:13,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:00:13,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:13,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:00:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:00:13,598 INFO L87 Difference]: Start difference. First operand 20222 states and 27632 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:18,387 INFO L93 Difference]: Finished difference Result 77319 states and 105816 transitions. [2021-11-07 02:00:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:00:18,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-07 02:00:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:18,467 INFO L225 Difference]: With dead ends: 77319 [2021-11-07 02:00:18,467 INFO L226 Difference]: Without dead ends: 57170 [2021-11-07 02:00:18,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:00:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57170 states. [2021-11-07 02:00:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57170 to 20222. [2021-11-07 02:00:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20222 states, 20204 states have (on average 1.3668580479113046) internal successors, (27616), 20221 states have internal predecessors, (27616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:20,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20222 states to 20222 states and 27616 transitions. [2021-11-07 02:00:20,333 INFO L78 Accepts]: Start accepts. Automaton has 20222 states and 27616 transitions. Word has length 147 [2021-11-07 02:00:20,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:20,333 INFO L470 AbstractCegarLoop]: Abstraction has 20222 states and 27616 transitions. [2021-11-07 02:00:20,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:20,333 INFO L276 IsEmpty]: Start isEmpty. Operand 20222 states and 27616 transitions. [2021-11-07 02:00:20,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 02:00:20,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:20,338 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:00:20,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:20,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:20,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:00:20,752 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 02:00:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1667204246, now seen corresponding path program 1 times [2021-11-07 02:00:20,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:20,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838034457] [2021-11-07 02:00:20,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:20,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:20,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:20,756 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:20,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 02:00:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:24,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:00:24,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:00:24,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:00:25,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:25,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838034457] [2021-11-07 02:00:25,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838034457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:00:25,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1941499075] [2021-11-07 02:00:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:25,581 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:00:25,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:00:25,586 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:00:25,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-07 02:00:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:28,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:00:28,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:00:29,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:00:30,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1941499075] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:30,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:00:30,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-07 02:00:30,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627672810] [2021-11-07 02:00:30,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:00:30,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:30,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:00:30,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:00:30,039 INFO L87 Difference]: Start difference. First operand 20222 states and 27616 transitions. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:38,576 INFO L93 Difference]: Finished difference Result 66202 states and 90189 transitions. [2021-11-07 02:00:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 02:00:38,577 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 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 148 [2021-11-07 02:00:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:38,634 INFO L225 Difference]: With dead ends: 66202 [2021-11-07 02:00:38,634 INFO L226 Difference]: Without dead ends: 46053 [2021-11-07 02:00:38,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=433, Invalid=1547, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 02:00:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46053 states. [2021-11-07 02:00:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46053 to 20254. [2021-11-07 02:00:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20254 states, 20236 states have (on average 1.3662779205376556) internal successors, (27648), 20253 states have internal predecessors, (27648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20254 states to 20254 states and 27648 transitions. [2021-11-07 02:00:41,059 INFO L78 Accepts]: Start accepts. Automaton has 20254 states and 27648 transitions. Word has length 148 [2021-11-07 02:00:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:41,059 INFO L470 AbstractCegarLoop]: Abstraction has 20254 states and 27648 transitions. [2021-11-07 02:00:41,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 20254 states and 27648 transitions. [2021-11-07 02:00:41,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-07 02:00:41,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:41,062 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:00:41,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:41,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-07 02:00:41,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:41,464 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 02:00:41,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:41,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1638499708, now seen corresponding path program 1 times [2021-11-07 02:00:41,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:41,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368810371] [2021-11-07 02:00:41,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:41,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:41,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:41,467 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:41,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-07 02:00:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:45,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:00:45,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:00:45,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:00:46,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:46,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368810371] [2021-11-07 02:00:46,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368810371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:00:46,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [164302410] [2021-11-07 02:00:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:46,394 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:00:46,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:00:46,395 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:00:46,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-07 02:00:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:49,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:00:49,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:00:50,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:00:50,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [164302410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:50,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:00:50,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:00:50,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385968052] [2021-11-07 02:00:50,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:00:50,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:50,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:00:50,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:00:50,800 INFO L87 Difference]: Start difference. First operand 20254 states and 27648 transitions. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:59,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:59,050 INFO L93 Difference]: Finished difference Result 57783 states and 78320 transitions. [2021-11-07 02:00:59,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:00:59,050 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 0 states have call successors, (0), 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 151 [2021-11-07 02:00:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:59,095 INFO L225 Difference]: With dead ends: 57783 [2021-11-07 02:00:59,095 INFO L226 Difference]: Without dead ends: 37602 [2021-11-07 02:00:59,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:00:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37602 states. [2021-11-07 02:01:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37602 to 20310. [2021-11-07 02:01:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20310 states, 20292 states have (on average 1.3648728562980486) internal successors, (27696), 20309 states have internal predecessors, (27696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20310 states to 20310 states and 27696 transitions. [2021-11-07 02:01:01,255 INFO L78 Accepts]: Start accepts. Automaton has 20310 states and 27696 transitions. Word has length 151 [2021-11-07 02:01:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:01,255 INFO L470 AbstractCegarLoop]: Abstraction has 20310 states and 27696 transitions. [2021-11-07 02:01:01,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 20310 states and 27696 transitions. [2021-11-07 02:01:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-07 02:01:01,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:01,258 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:01:01,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:01,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-11-07 02:01:01,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:01,658 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 02:01:01,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:01,659 INFO L85 PathProgramCache]: Analyzing trace with hash 613794355, now seen corresponding path program 1 times [2021-11-07 02:01:01,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:01,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368717532] [2021-11-07 02:01:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:01,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:01,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:01,662 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:01,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-07 02:01:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:05,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:01:05,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:01:06,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:01:06,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:06,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368717532] [2021-11-07 02:01:06,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368717532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:06,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2067982807] [2021-11-07 02:01:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:06,844 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:06,845 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:06,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-07 02:01:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:10,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:01:10,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:01:11,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:01:11,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2067982807] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:11,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:01:11,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:01:11,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438782422] [2021-11-07 02:01:11,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:01:11,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:11,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:01:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:01:11,720 INFO L87 Difference]: Start difference. First operand 20310 states and 27696 transitions. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:15,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:15,685 INFO L93 Difference]: Finished difference Result 52179 states and 70876 transitions. [2021-11-07 02:01:15,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:01:15,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 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 168 [2021-11-07 02:01:15,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:15,730 INFO L225 Difference]: With dead ends: 52179 [2021-11-07 02:01:15,731 INFO L226 Difference]: Without dead ends: 31942 [2021-11-07 02:01:15,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:01:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31942 states. [2021-11-07 02:01:18,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31942 to 20374. [2021-11-07 02:01:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20374 states, 20356 states have (on average 1.3637256828453528) internal successors, (27760), 20373 states have internal predecessors, (27760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20374 states to 20374 states and 27760 transitions. [2021-11-07 02:01:18,083 INFO L78 Accepts]: Start accepts. Automaton has 20374 states and 27760 transitions. Word has length 168 [2021-11-07 02:01:18,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:18,083 INFO L470 AbstractCegarLoop]: Abstraction has 20374 states and 27760 transitions. [2021-11-07 02:01:18,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:18,084 INFO L276 IsEmpty]: Start isEmpty. Operand 20374 states and 27760 transitions. [2021-11-07 02:01:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-07 02:01:18,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:18,086 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:01:18,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-07 02:01:18,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:18,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:18,488 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 02:01:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:18,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1768460082, now seen corresponding path program 1 times [2021-11-07 02:01:18,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:18,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808678033] [2021-11-07 02:01:18,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:18,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:18,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:18,492 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:18,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-07 02:01:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:22,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1751 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:01:22,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:01:23,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:01:23,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:23,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808678033] [2021-11-07 02:01:23,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808678033] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:23,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [637267359] [2021-11-07 02:01:23,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:23,739 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:23,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:23,740 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:23,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-07 02:01:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:29,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 1751 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:01:29,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:01:29,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:01:30,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [637267359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:30,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509319340] [2021-11-07 02:01:30,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:30,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:01:30,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:01:30,207 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:01:30,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 02:01:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:33,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 1751 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:01:33,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 02:01:34,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 02:01:34,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509319340] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:34,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:01:34,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-07 02:01:34,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128439810] [2021-11-07 02:01:34,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:01:34,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:34,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:01:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:01:34,488 INFO L87 Difference]: Start difference. First operand 20374 states and 27760 transitions. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:40,200 INFO L93 Difference]: Finished difference Result 48670 states and 66374 transitions. [2021-11-07 02:01:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:01:40,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 0 states have call successors, (0), 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 [2021-11-07 02:01:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:40,263 INFO L225 Difference]: With dead ends: 48670 [2021-11-07 02:01:40,263 INFO L226 Difference]: Without dead ends: 48580 [2021-11-07 02:01:40,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1017 GetRequests, 1003 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:01:40,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48580 states. [2021-11-07 02:01:42,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48580 to 20286. [2021-11-07 02:01:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20286 states, 20268 states have (on average 1.3632820209196763) internal successors, (27631), 20285 states have internal predecessors, (27631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20286 states to 20286 states and 27631 transitions. [2021-11-07 02:01:42,914 INFO L78 Accepts]: Start accepts. Automaton has 20286 states and 27631 transitions. Word has length 170 [2021-11-07 02:01:42,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:42,914 INFO L470 AbstractCegarLoop]: Abstraction has 20286 states and 27631 transitions. [2021-11-07 02:01:42,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:42,915 INFO L276 IsEmpty]: Start isEmpty. Operand 20286 states and 27631 transitions. [2021-11-07 02:01:42,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-07 02:01:42,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:42,917 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:01:42,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:43,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:43,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-07 02:01:43,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:43,518 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 02:01:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:43,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1067395504, now seen corresponding path program 1 times [2021-11-07 02:01:43,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:43,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346509090] [2021-11-07 02:01:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:43,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:43,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:43,521 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:43,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-07 02:01:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:47,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:01:47,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:01:48,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:01:49,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:49,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346509090] [2021-11-07 02:01:49,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346509090] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:49,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1774116140] [2021-11-07 02:01:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:49,095 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:49,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:49,096 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:49,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-07 02:01:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:53,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:53,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 02:01:53,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 02:01:53,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1774116140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:53,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:01:53,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:01:53,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232125472] [2021-11-07 02:01:53,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:53,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:53,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:53,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:01:53,852 INFO L87 Difference]: Start difference. First operand 20286 states and 27631 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:58,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:58,023 INFO L93 Difference]: Finished difference Result 35861 states and 48779 transitions. [2021-11-07 02:01:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:58,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-07 02:01:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:58,040 INFO L225 Difference]: With dead ends: 35861 [2021-11-07 02:01:58,040 INFO L226 Difference]: Without dead ends: 15648 [2021-11-07 02:01:58,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 669 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:01:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15648 states. [2021-11-07 02:02:00,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15648 to 15460. [2021-11-07 02:02:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15460 states, 15450 states have (on average 1.3583818770226537) internal successors, (20987), 15459 states have internal predecessors, (20987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15460 states to 15460 states and 20987 transitions. [2021-11-07 02:02:00,135 INFO L78 Accepts]: Start accepts. Automaton has 15460 states and 20987 transitions. Word has length 170 [2021-11-07 02:02:00,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:00,136 INFO L470 AbstractCegarLoop]: Abstraction has 15460 states and 20987 transitions. [2021-11-07 02:02:00,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 15460 states and 20987 transitions. [2021-11-07 02:02:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-07 02:02:00,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:00,139 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2021-11-07 02:02:00,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:00,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-07 02:02:00,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:00,540 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 02:02:00,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1057836203, now seen corresponding path program 1 times [2021-11-07 02:02:00,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:00,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35818243] [2021-11-07 02:02:00,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:00,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:00,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:00,543 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:00,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-07 02:02:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:04,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:02:05,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 02:02:05,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 02:02:06,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:06,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35818243] [2021-11-07 02:02:06,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35818243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:06,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2129743184] [2021-11-07 02:02:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:06,424 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:06,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:02:06,425 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:02:06,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-07 02:02:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:12,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:02:12,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 02:02:13,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 02:02:13,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2129743184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:13,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904671118] [2021-11-07 02:02:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:13,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:02:13,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:02:13,675 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:02:13,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 02:02:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:17,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:02:17,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 02:02:17,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 02:02:18,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904671118] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:18,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:02:18,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-07 02:02:18,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759933670] [2021-11-07 02:02:18,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:02:18,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:18,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:02:18,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:02:18,419 INFO L87 Difference]: Start difference. First operand 15460 states and 20987 transitions. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:21,557 INFO L93 Difference]: Finished difference Result 35927 states and 48735 transitions. [2021-11-07 02:02:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:02:21,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 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 175 [2021-11-07 02:02:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:21,581 INFO L225 Difference]: With dead ends: 35927 [2021-11-07 02:02:21,581 INFO L226 Difference]: Without dead ends: 20540 [2021-11-07 02:02:21,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 1033 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:02:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20540 states. [2021-11-07 02:02:23,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20540 to 10406. [2021-11-07 02:02:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10406 states, 10396 states have (on average 1.354270873412851) internal successors, (14079), 10405 states have internal predecessors, (14079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10406 states to 10406 states and 14079 transitions. [2021-11-07 02:02:23,154 INFO L78 Accepts]: Start accepts. Automaton has 10406 states and 14079 transitions. Word has length 175 [2021-11-07 02:02:23,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:23,154 INFO L470 AbstractCegarLoop]: Abstraction has 10406 states and 14079 transitions. [2021-11-07 02:02:23,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:23,155 INFO L276 IsEmpty]: Start isEmpty. Operand 10406 states and 14079 transitions. [2021-11-07 02:02:23,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-07 02:02:23,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:23,160 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:23,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:23,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:23,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:23,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:02:23,764 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 02:02:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash -878089451, now seen corresponding path program 1 times [2021-11-07 02:02:23,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:23,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511486640] [2021-11-07 02:02:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:23,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:23,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:23,768 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:23,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-07 02:02:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:28,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 2294 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:02:28,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:02:29,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:02:30,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:30,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511486640] [2021-11-07 02:02:30,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511486640] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:30,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1855139856] [2021-11-07 02:02:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:30,743 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:30,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:02:30,743 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:02:30,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-07 02:02:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:35,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 2294 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:35,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:02:36,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:02:36,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1855139856] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:36,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:02:36,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:02:36,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389267117] [2021-11-07 02:02:36,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:36,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:36,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:36,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:02:36,681 INFO L87 Difference]: Start difference. First operand 10406 states and 14079 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:39,867 INFO L93 Difference]: Finished difference Result 20747 states and 28092 transitions. [2021-11-07 02:02:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:39,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 219 [2021-11-07 02:02:39,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:39,881 INFO L225 Difference]: With dead ends: 20747 [2021-11-07 02:02:39,881 INFO L226 Difference]: Without dead ends: 10414 [2021-11-07 02:02:39,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 865 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:02:39,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10414 states. [2021-11-07 02:02:41,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10414 to 10414. [2021-11-07 02:02:41,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10414 states, 10404 states have (on average 1.3539984621299501) internal successors, (14087), 10413 states have internal predecessors, (14087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10414 states to 10414 states and 14087 transitions. [2021-11-07 02:02:41,368 INFO L78 Accepts]: Start accepts. Automaton has 10414 states and 14087 transitions. Word has length 219 [2021-11-07 02:02:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:41,368 INFO L470 AbstractCegarLoop]: Abstraction has 10414 states and 14087 transitions. [2021-11-07 02:02:41,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 10414 states and 14087 transitions. [2021-11-07 02:02:41,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-07 02:02:41,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:41,373 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:41,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2021-11-07 02:02:41,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2021-11-07 02:02:41,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:41,774 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 02:02:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:41,775 INFO L85 PathProgramCache]: Analyzing trace with hash -893608169, now seen corresponding path program 1 times [2021-11-07 02:02:41,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:41,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133400628] [2021-11-07 02:02:41,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:41,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:41,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:41,779 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:41,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-07 02:02:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:47,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 2296 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:02:47,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:02:48,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:02:49,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:49,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133400628] [2021-11-07 02:02:49,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133400628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:49,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1583573414] [2021-11-07 02:02:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:49,017 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:49,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:02:49,018 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:02:49,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-07 02:02:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:54,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 2296 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:02:54,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:02:54,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:02:55,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1583573414] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:55,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:02:55,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 02:02:55,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263273529] [2021-11-07 02:02:55,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:02:55,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:02:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:02:55,404 INFO L87 Difference]: Start difference. First operand 10414 states and 14087 transitions. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:58,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:58,373 INFO L93 Difference]: Finished difference Result 27684 states and 37502 transitions. [2021-11-07 02:02:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:02:58,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 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 219 [2021-11-07 02:02:58,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:58,397 INFO L225 Difference]: With dead ends: 27684 [2021-11-07 02:02:58,397 INFO L226 Difference]: Without dead ends: 17343 [2021-11-07 02:02:58,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 865 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:02:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17343 states. [2021-11-07 02:02:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17343 to 10438. [2021-11-07 02:02:59,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10438 states, 10428 states have (on average 1.3531837360951284) internal successors, (14111), 10437 states have internal predecessors, (14111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10438 states to 10438 states and 14111 transitions. [2021-11-07 02:03:00,013 INFO L78 Accepts]: Start accepts. Automaton has 10438 states and 14111 transitions. Word has length 219 [2021-11-07 02:03:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:00,013 INFO L470 AbstractCegarLoop]: Abstraction has 10438 states and 14111 transitions. [2021-11-07 02:03:00,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 10438 states and 14111 transitions. [2021-11-07 02:03:00,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-07 02:03:00,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:00,018 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:00,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:00,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:00,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:00,419 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 02:03:00,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:00,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1929246978, now seen corresponding path program 1 times [2021-11-07 02:03:00,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:00,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400405983] [2021-11-07 02:03:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:00,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:00,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:00,423 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:00,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-07 02:03:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 2303 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:03:06,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:03:06,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:03:07,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:07,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400405983] [2021-11-07 02:03:07,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400405983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:03:07,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [62165686] [2021-11-07 02:03:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:07,886 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:03:07,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:03:07,887 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:03:07,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-07 02:03:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:13,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 2303 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:03:13,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:03:14,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:03:15,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [62165686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:15,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:03:15,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-07 02:03:15,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325611758] [2021-11-07 02:03:15,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:03:15,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:03:15,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:03:15,293 INFO L87 Difference]: Start difference. First operand 10438 states and 14111 transitions. Second operand has 12 states, 12 states have (on average 18.333333333333332) internal successors, (220), 12 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:29,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:29,550 INFO L93 Difference]: Finished difference Result 43758 states and 59501 transitions. [2021-11-07 02:03:29,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 02:03:29,551 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 18.333333333333332) internal successors, (220), 12 states have internal predecessors, (220), 0 states have call successors, (0), 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 221 [2021-11-07 02:03:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:29,598 INFO L225 Difference]: With dead ends: 43758 [2021-11-07 02:03:29,598 INFO L226 Difference]: Without dead ends: 33393 [2021-11-07 02:03:29,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-11-07 02:03:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33393 states. [2021-11-07 02:03:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33393 to 10478. [2021-11-07 02:03:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10478 states, 10468 states have (on average 1.3518341612533435) internal successors, (14151), 10477 states have internal predecessors, (14151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10478 states to 10478 states and 14151 transitions. [2021-11-07 02:03:31,662 INFO L78 Accepts]: Start accepts. Automaton has 10478 states and 14151 transitions. Word has length 221 [2021-11-07 02:03:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:31,662 INFO L470 AbstractCegarLoop]: Abstraction has 10478 states and 14151 transitions. [2021-11-07 02:03:31,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.333333333333332) internal successors, (220), 12 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 10478 states and 14151 transitions. [2021-11-07 02:03:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-07 02:03:31,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:31,667 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:31,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:31,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:32,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:03:32,068 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 02:03:32,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1323399942, now seen corresponding path program 1 times [2021-11-07 02:03:32,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:32,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184636125] [2021-11-07 02:03:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:32,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:32,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:32,071 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:32,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-07 02:03:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:38,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 2314 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:03:38,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:03:38,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 02:03:39,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:39,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184636125] [2021-11-07 02:03:39,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184636125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:03:39,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1146225905] [2021-11-07 02:03:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:39,799 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:03:39,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:03:39,800 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:03:39,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2021-11-07 02:03:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:45,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 2314 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:03:45,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:46,148 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 02:03:46,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 22 [2021-11-07 02:03:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 02:03:46,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 02:03:48,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1146225905] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:48,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:03:48,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-07 02:03:48,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034471317] [2021-11-07 02:03:48,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:03:48,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:48,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:03:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=120, Unknown=1, NotChecked=0, Total=156 [2021-11-07 02:03:48,947 INFO L87 Difference]: Start difference. First operand 10478 states and 14151 transitions. Second operand has 7 states, 7 states have (on average 30.571428571428573) internal successors, (214), 7 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:14,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:14,731 INFO L93 Difference]: Finished difference Result 21036 states and 28422 transitions. [2021-11-07 02:04:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:04:14,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.571428571428573) internal successors, (214), 7 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2021-11-07 02:04:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:14,756 INFO L225 Difference]: With dead ends: 21036 [2021-11-07 02:04:14,756 INFO L226 Difference]: Without dead ends: 10631 [2021-11-07 02:04:14,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2021-11-07 02:04:14,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10631 states. [2021-11-07 02:04:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10631 to 10623. [2021-11-07 02:04:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10623 states, 10614 states have (on average 1.3507631430186546) internal successors, (14337), 10622 states have internal predecessors, (14337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:16,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10623 states to 10623 states and 14337 transitions. [2021-11-07 02:04:16,736 INFO L78 Accepts]: Start accepts. Automaton has 10623 states and 14337 transitions. Word has length 223 [2021-11-07 02:04:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:16,737 INFO L470 AbstractCegarLoop]: Abstraction has 10623 states and 14337 transitions. [2021-11-07 02:04:16,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.571428571428573) internal successors, (214), 7 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:16,737 INFO L276 IsEmpty]: Start isEmpty. Operand 10623 states and 14337 transitions. [2021-11-07 02:04:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 02:04:16,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:16,743 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:16,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:16,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:17,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:17,144 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 02:04:17,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:17,144 INFO L85 PathProgramCache]: Analyzing trace with hash 573687521, now seen corresponding path program 1 times [2021-11-07 02:04:17,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:17,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477133041] [2021-11-07 02:04:17,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:17,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:17,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:17,148 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:17,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-07 02:04:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:23,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 2361 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:04:23,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 02:04:24,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 02:04:25,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:25,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477133041] [2021-11-07 02:04:25,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477133041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:25,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [933092834] [2021-11-07 02:04:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:25,243 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:25,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:04:25,244 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:04:25,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-11-07 02:04:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:31,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 2361 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:04:31,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:32,074 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 02:04:32,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 21 [2021-11-07 02:04:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 02:04:34,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 02:04:37,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [933092834] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:37,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:04:37,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-07 02:04:37,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755605305] [2021-11-07 02:04:37,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:04:37,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:37,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:04:37,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=119, Unknown=2, NotChecked=0, Total=156 [2021-11-07 02:04:37,255 INFO L87 Difference]: Start difference. First operand 10623 states and 14337 transitions. Second operand has 7 states, 7 states have (on average 33.42857142857143) internal successors, (234), 7 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:04,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:04,628 INFO L93 Difference]: Finished difference Result 21105 states and 28500 transitions. [2021-11-07 02:05:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:05:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.42857142857143) internal successors, (234), 7 states have internal predecessors, (234), 0 states have call successors, (0), 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 243 [2021-11-07 02:05:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:04,653 INFO L225 Difference]: With dead ends: 21105 [2021-11-07 02:05:04,653 INFO L226 Difference]: Without dead ends: 10555 [2021-11-07 02:05:04,664 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 957 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=41, Invalid=139, Unknown=2, NotChecked=0, Total=182 [2021-11-07 02:05:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10555 states. [2021-11-07 02:05:06,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10555 to 10547. [2021-11-07 02:05:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10547 states, 10538 states have (on average 1.3506357942683622) internal successors, (14233), 10546 states have internal predecessors, (14233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:06,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10547 states to 10547 states and 14233 transitions. [2021-11-07 02:05:06,681 INFO L78 Accepts]: Start accepts. Automaton has 10547 states and 14233 transitions. Word has length 243 [2021-11-07 02:05:06,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:06,681 INFO L470 AbstractCegarLoop]: Abstraction has 10547 states and 14233 transitions. [2021-11-07 02:05:06,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.42857142857143) internal successors, (234), 7 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 10547 states and 14233 transitions. [2021-11-07 02:05:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-07 02:05:06,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:06,692 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:06,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:06,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:07,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:07,116 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 35 more)] === [2021-11-07 02:05:07,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash -481958064, now seen corresponding path program 1 times [2021-11-07 02:05:07,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:07,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768024936] [2021-11-07 02:05:07,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:07,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:07,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:07,121 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:07,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-07 02:05:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:14,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 2408 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:05:14,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 02:05:15,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 02:05:16,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:16,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768024936] [2021-11-07 02:05:16,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768024936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:16,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [118023900] [2021-11-07 02:05:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:16,685 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:16,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:16,686 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:16,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7f551ef-fffd-4cb8-8589-f13dee37b705/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-11-07 02:05:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:23,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 2408 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 02:05:23,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 02:05:28,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 02:05:33,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [118023900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:33,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:05:33,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 7] imperfect sequences [5, 5] total 25 [2021-11-07 02:05:33,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464679095] [2021-11-07 02:05:33,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 02:05:33,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:33,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 02:05:33,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-07 02:05:33,182 INFO L87 Difference]: Start difference. First operand 10547 states and 14233 transitions. Second operand has 19 states, 19 states have (on average 24.105263157894736) internal successors, (458), 18 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)