./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.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_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/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_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/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_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/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 f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:22:31,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:22:31,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:22:31,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:22:31,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:22:31,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:22:31,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:22:31,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:22:31,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:22:31,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:22:31,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:22:31,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:22:31,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:22:31,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:22:31,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:22:31,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:22:31,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:22:31,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:22:31,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:22:31,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:22:31,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:22:31,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:22:31,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:22:31,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:22:31,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:22:31,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:22:31,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:22:31,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:22:31,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:22:31,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:22:31,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:22:31,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:22:31,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:22:31,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:22:31,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:22:31,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:22:31,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:22:31,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:22:31,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:22:31,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:22:31,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:22:31,678 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:22:31,729 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:22:31,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:22:31,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:22:31,731 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:22:31,731 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:22:31,731 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:22:31,732 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:22:31,732 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:22:31,732 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:22:31,732 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:22:31,740 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:22:31,741 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:22:31,741 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:22:31,741 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:22:31,742 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:22:31,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:22:31,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:22:31,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:22:31,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:22:31,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:22:31,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:22:31,744 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:22:31,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:22:31,745 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:22:31,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:22:31,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:22:31,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:22:31,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:22:31,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:22:31,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:22:31,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:22:31,749 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:22:31,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:22:31,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:22:31,750 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:22:31,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:22:31,750 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_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-07 02:22:32,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:22:32,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:22:32,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:22:32,178 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:22:32,179 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:22:32,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-07 02:22:32,264 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/data/505a226a2/b475bcf7cae74265ab69148ed0d3bde9/FLAG58c6660e8 [2021-11-07 02:22:33,250 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:22:33,252 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-07 02:22:33,309 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/data/505a226a2/b475bcf7cae74265ab69148ed0d3bde9/FLAG58c6660e8 [2021-11-07 02:22:33,691 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/data/505a226a2/b475bcf7cae74265ab69148ed0d3bde9 [2021-11-07 02:22:33,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:22:33,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:22:33,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:22:33,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:22:33,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:22:33,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:22:33" (1/1) ... [2021-11-07 02:22:33,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f333f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:33, skipping insertion in model container [2021-11-07 02:22:33,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:22:33" (1/1) ... [2021-11-07 02:22:33,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:22:33,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:22:35,021 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_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-07 02:22:35,152 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 02:22:35,157 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:22:35,194 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 02:22:35,205 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 02:22:35,216 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 02:22:35,262 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 02:22:35,263 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 02:22:35,294 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 02:22:35,354 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 02:22:35,355 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 02:22:35,360 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 02:22:35,361 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 02:22:35,362 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 02:22:35,362 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 02:22:35,363 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 02:22:35,363 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 02:22:35,413 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 02:22:35,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:22:35,458 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 02:22:35,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34ac6adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:35, skipping insertion in model container [2021-11-07 02:22:35,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:22:35,460 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:22:35,462 INFO L168 Benchmark]: Toolchain (without parser) took 1765.93 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 68.5 MB in the beginning and 71.0 MB in the end (delta: -2.5 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:22:35,463 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 72.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:22:35,464 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1763.05 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 68.2 MB in the beginning and 71.0 MB in the end (delta: -2.8 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:22:35,465 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 72.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1763.05 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 68.2 MB in the beginning and 71.0 MB in the end (delta: -2.8 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5540]: 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_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/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_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/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_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/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 f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:22:38,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:22:38,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:22:38,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:22:38,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:22:38,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:22:38,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:22:38,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:22:38,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:22:38,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:22:38,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:22:38,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:22:38,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:22:38,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:22:38,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:22:38,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:22:38,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:22:38,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:22:38,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:22:38,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:22:38,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:22:38,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:22:38,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:22:38,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:22:38,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:22:38,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:22:38,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:22:38,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:22:38,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:22:38,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:22:38,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:22:38,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:22:38,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:22:38,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:22:38,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:22:38,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:22:38,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:22:38,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:22:38,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:22:38,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:22:38,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:22:38,217 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:22:38,273 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:22:38,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:22:38,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:22:38,276 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:22:38,276 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:22:38,276 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:22:38,277 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:22:38,277 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:22:38,277 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:22:38,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:22:38,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:22:38,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:22:38,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:22:38,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:22:38,282 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:22:38,282 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:22:38,282 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:22:38,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:22:38,283 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:22:38,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:22:38,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:22:38,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:22:38,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:22:38,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:22:38,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:22:38,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:22:38,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:22:38,285 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:22:38,285 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:38,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:22:38,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:22:38,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:22:38,286 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_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-07 02:22:38,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:22:38,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:22:38,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:22:38,780 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:22:38,782 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:22:38,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-07 02:22:38,862 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/data/8b8e7ac2a/9241ec6ed3814596be9f555c60e55c46/FLAG84e78f7f0 [2021-11-07 02:22:40,006 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:22:40,007 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-07 02:22:40,055 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/data/8b8e7ac2a/9241ec6ed3814596be9f555c60e55c46/FLAG84e78f7f0 [2021-11-07 02:22:40,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/data/8b8e7ac2a/9241ec6ed3814596be9f555c60e55c46 [2021-11-07 02:22:40,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:22:40,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:22:40,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:22:40,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:22:40,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:22:40,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:22:40" (1/1) ... [2021-11-07 02:22:40,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1431229a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:40, skipping insertion in model container [2021-11-07 02:22:40,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:22:40" (1/1) ... [2021-11-07 02:22:40,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:22:40,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:22:41,658 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_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-07 02:22:42,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:22:42,157 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:22:42,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:22:42,403 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_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-07 02:22:42,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:22:42,563 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:22:42,748 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_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-07 02:22:42,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:22:42,941 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:22:42,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:42 WrapperNode [2021-11-07 02:22:42,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:22:42,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:22:42,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:22:42,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:22:42,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:42" (1/1) ... [2021-11-07 02:22:43,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:42" (1/1) ... [2021-11-07 02:22:43,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:22:43,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:22:43,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:22:43,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:22:43,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:42" (1/1) ... [2021-11-07 02:22:43,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:42" (1/1) ... [2021-11-07 02:22:43,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:42" (1/1) ... [2021-11-07 02:22:43,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:42" (1/1) ... [2021-11-07 02:22:43,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:42" (1/1) ... [2021-11-07 02:22:43,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:42" (1/1) ... [2021-11-07 02:22:43,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:42" (1/1) ... [2021-11-07 02:22:43,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:22:43,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:22:43,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:22:43,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:22:43,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:42" (1/1) ... [2021-11-07 02:22:43,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:22:43,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:22:43,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:22:43,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:22:43,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:22:43,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:22:43,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:22:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:22:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 02:22:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:22:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:22:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:22:43,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:22:43,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:22:43,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:22:43,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:22:43,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:22:43,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:22:43,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:22:43,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:22:43,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 02:22:43,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:22:43,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 02:22:43,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:22:43,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 02:22:43,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:22:43,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:22:43,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 02:22:43,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 02:22:43,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:22:43,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:22:43,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:22:43,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:23:06,175 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:23:06,175 INFO L299 CfgBuilder]: Removed 769 assume(true) statements. [2021-11-07 02:23:06,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:23:06 BoogieIcfgContainer [2021-11-07 02:23:06,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:23:06,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:23:06,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:23:06,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:23:06,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:22:40" (1/3) ... [2021-11-07 02:23:06,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a30ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:23:06, skipping insertion in model container [2021-11-07 02:23:06,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:42" (2/3) ... [2021-11-07 02:23:06,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a30ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:23:06, skipping insertion in model container [2021-11-07 02:23:06,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:23:06" (3/3) ... [2021-11-07 02:23:06,189 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-07 02:23:06,195 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:23:06,196 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:23:06,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:23:06,263 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 02:23:06,263 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:23:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 0 states have call successors, (0), 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 02:23:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:23:06,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:06,316 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] [2021-11-07 02:23:06,317 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:06,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:06,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1898451720, now seen corresponding path program 1 times [2021-11-07 02:23:06,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:06,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401102947] [2021-11-07 02:23:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:06,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:06,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:06,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:06,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:23:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:06,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:06,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:07,195 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 02:23:07,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:07,429 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 02:23:07,430 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:07,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401102947] [2021-11-07 02:23:07,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401102947] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:07,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:07,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:23:07,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794358682] [2021-11-07 02:23:07,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:07,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:07,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:07,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:07,456 INFO L87 Difference]: Start difference. First operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 0 states have call successors, (0), 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 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 02:23:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:08,367 INFO L93 Difference]: Finished difference Result 3424 states and 5255 transitions. [2021-11-07 02:23:08,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:08,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 02:23:08,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:08,417 INFO L225 Difference]: With dead ends: 3424 [2021-11-07 02:23:08,417 INFO L226 Difference]: Without dead ends: 2515 [2021-11-07 02:23:08,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 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 02:23:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-11-07 02:23:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2515. [2021-11-07 02:23:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2515 states, 2514 states have (on average 1.4657915672235482) internal successors, (3685), 2514 states have internal predecessors, (3685), 0 states have call successors, (0), 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 02:23:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 3685 transitions. [2021-11-07 02:23:08,687 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 3685 transitions. Word has length 36 [2021-11-07 02:23:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:08,688 INFO L470 AbstractCegarLoop]: Abstraction has 2515 states and 3685 transitions. [2021-11-07 02:23:08,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 02:23:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 3685 transitions. [2021-11-07 02:23:08,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:23:08,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:08,704 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] [2021-11-07 02:23:08,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:08,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:08,922 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:08,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash 331004688, now seen corresponding path program 1 times [2021-11-07 02:23:08,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:08,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957899629] [2021-11-07 02:23:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:08,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:08,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:08,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:08,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:23:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:09,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:09,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:09,828 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 02:23:09,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:09,992 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 02:23:09,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:09,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957899629] [2021-11-07 02:23:09,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957899629] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:09,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:09,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:23:09,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027337748] [2021-11-07 02:23:09,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:23:09,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:10,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:23:10,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:23:10,003 INFO L87 Difference]: Start difference. First operand 2515 states and 3685 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 02:23:10,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:10,569 INFO L93 Difference]: Finished difference Result 6629 states and 9733 transitions. [2021-11-07 02:23:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:23:10,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 02:23:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:10,599 INFO L225 Difference]: With dead ends: 6629 [2021-11-07 02:23:10,599 INFO L226 Difference]: Without dead ends: 4167 [2021-11-07 02:23:10,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:23:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2021-11-07 02:23:10,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 2518. [2021-11-07 02:23:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2517 states have (on average 1.464839094159714) internal successors, (3687), 2517 states have internal predecessors, (3687), 0 states have call successors, (0), 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 02:23:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3687 transitions. [2021-11-07 02:23:10,790 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3687 transitions. Word has length 40 [2021-11-07 02:23:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:10,791 INFO L470 AbstractCegarLoop]: Abstraction has 2518 states and 3687 transitions. [2021-11-07 02:23:10,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 02:23:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3687 transitions. [2021-11-07 02:23:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:23:10,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:10,796 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] [2021-11-07 02:23:10,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:11,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:11,012 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:11,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:11,013 INFO L85 PathProgramCache]: Analyzing trace with hash -349053682, now seen corresponding path program 1 times [2021-11-07 02:23:11,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:11,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132950680] [2021-11-07 02:23:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:11,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:11,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:11,015 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:11,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:23:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:11,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:11,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:11,947 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 02:23:11,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:12,340 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 02:23:12,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:12,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132950680] [2021-11-07 02:23:12,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132950680] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:12,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:12,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 02:23:12,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617409739] [2021-11-07 02:23:12,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:23:12,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:23:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:23:12,344 INFO L87 Difference]: Start difference. First operand 2518 states and 3687 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 02:23:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:14,624 INFO L93 Difference]: Finished difference Result 7446 states and 10934 transitions. [2021-11-07 02:23:14,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:23:14,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 02:23:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:14,657 INFO L225 Difference]: With dead ends: 7446 [2021-11-07 02:23:14,657 INFO L226 Difference]: Without dead ends: 4975 [2021-11-07 02:23:14,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:23:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4975 states. [2021-11-07 02:23:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4975 to 4831. [2021-11-07 02:23:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4830 states have (on average 1.4737060041407868) internal successors, (7118), 4830 states have internal predecessors, (7118), 0 states have call successors, (0), 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 02:23:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 7118 transitions. [2021-11-07 02:23:14,961 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 7118 transitions. Word has length 40 [2021-11-07 02:23:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:14,962 INFO L470 AbstractCegarLoop]: Abstraction has 4831 states and 7118 transitions. [2021-11-07 02:23:14,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 02:23:14,963 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 7118 transitions. [2021-11-07 02:23:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:23:14,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:14,969 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:14,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:15,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:15,187 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:15,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2050141973, now seen corresponding path program 1 times [2021-11-07 02:23:15,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:15,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098615816] [2021-11-07 02:23:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:15,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:15,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:15,193 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:15,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:23:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:15,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:15,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:16,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:16,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:16,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098615816] [2021-11-07 02:23:16,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098615816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:16,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:16,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:23:16,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208918497] [2021-11-07 02:23:16,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:16,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:16,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:16,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:16,653 INFO L87 Difference]: Start difference. First operand 4831 states and 7118 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 02:23:17,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:17,363 INFO L93 Difference]: Finished difference Result 11795 states and 17437 transitions. [2021-11-07 02:23:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:17,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 02:23:17,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:17,407 INFO L225 Difference]: With dead ends: 11795 [2021-11-07 02:23:17,407 INFO L226 Difference]: Without dead ends: 7017 [2021-11-07 02:23:17,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-11-07 02:23:17,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 6991. [2021-11-07 02:23:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 1.4804005722460658) internal successors, (10348), 6990 states have internal predecessors, (10348), 0 states have call successors, (0), 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 02:23:17,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 10348 transitions. [2021-11-07 02:23:17,919 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 10348 transitions. Word has length 69 [2021-11-07 02:23:17,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:17,920 INFO L470 AbstractCegarLoop]: Abstraction has 6991 states and 10348 transitions. [2021-11-07 02:23:17,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 02:23:17,920 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 10348 transitions. [2021-11-07 02:23:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:23:17,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:17,929 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:23:17,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:18,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:18,143 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:18,144 INFO L85 PathProgramCache]: Analyzing trace with hash -643253754, now seen corresponding path program 1 times [2021-11-07 02:23:18,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:18,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994703313] [2021-11-07 02:23:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:18,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:18,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:18,147 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:18,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:23:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:18,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:18,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:19,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:19,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:19,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994703313] [2021-11-07 02:23:19,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994703313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:19,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:19,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:23:19,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353112457] [2021-11-07 02:23:19,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:19,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:19,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:19,902 INFO L87 Difference]: Start difference. First operand 6991 states and 10348 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 02:23:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:20,488 INFO L93 Difference]: Finished difference Result 16727 states and 24734 transitions. [2021-11-07 02:23:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:20,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:23:20,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:20,556 INFO L225 Difference]: With dead ends: 16727 [2021-11-07 02:23:20,557 INFO L226 Difference]: Without dead ends: 9789 [2021-11-07 02:23:20,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:20,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9789 states. [2021-11-07 02:23:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9789 to 9760. [2021-11-07 02:23:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9760 states, 9759 states have (on average 1.4756634901116918) internal successors, (14401), 9759 states have internal predecessors, (14401), 0 states have call successors, (0), 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 02:23:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9760 states to 9760 states and 14401 transitions. [2021-11-07 02:23:21,211 INFO L78 Accepts]: Start accepts. Automaton has 9760 states and 14401 transitions. Word has length 75 [2021-11-07 02:23:21,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:21,213 INFO L470 AbstractCegarLoop]: Abstraction has 9760 states and 14401 transitions. [2021-11-07 02:23:21,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 02:23:21,214 INFO L276 IsEmpty]: Start isEmpty. Operand 9760 states and 14401 transitions. [2021-11-07 02:23:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:23:21,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:21,229 INFO L513 BasicCegarLoop]: trace histogram [3, 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 02:23:21,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:21,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:21,451 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:21,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:21,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1358903704, now seen corresponding path program 1 times [2021-11-07 02:23:21,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:21,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13981307] [2021-11-07 02:23:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:21,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:21,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:21,455 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:21,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:23:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:22,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:22,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:22,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:23,259 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:23,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13981307] [2021-11-07 02:23:23,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13981307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:23,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:23,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:23:23,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57054012] [2021-11-07 02:23:23,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:23,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:23,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:23,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:23,262 INFO L87 Difference]: Start difference. First operand 9760 states and 14401 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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 02:23:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:24,870 INFO L93 Difference]: Finished difference Result 24595 states and 36627 transitions. [2021-11-07 02:23:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:24,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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 83 [2021-11-07 02:23:24,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:24,914 INFO L225 Difference]: With dead ends: 24595 [2021-11-07 02:23:24,914 INFO L226 Difference]: Without dead ends: 14888 [2021-11-07 02:23:24,930 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 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 02:23:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14888 states. [2021-11-07 02:23:25,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14888 to 14836. [2021-11-07 02:23:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14836 states, 14835 states have (on average 1.4816986855409504) internal successors, (21981), 14835 states have internal predecessors, (21981), 0 states have call successors, (0), 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 02:23:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14836 states to 14836 states and 21981 transitions. [2021-11-07 02:23:25,670 INFO L78 Accepts]: Start accepts. Automaton has 14836 states and 21981 transitions. Word has length 83 [2021-11-07 02:23:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:25,672 INFO L470 AbstractCegarLoop]: Abstraction has 14836 states and 21981 transitions. [2021-11-07 02:23:25,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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 02:23:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 14836 states and 21981 transitions. [2021-11-07 02:23:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:23:25,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:25,687 INFO L513 BasicCegarLoop]: trace histogram [3, 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 02:23:25,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:25,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:25,903 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:25,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1475894567, now seen corresponding path program 1 times [2021-11-07 02:23:25,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:25,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752909686] [2021-11-07 02:23:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:25,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:25,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:25,906 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:25,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:23:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:26,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:26,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:23:27,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:23:27,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:27,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752909686] [2021-11-07 02:23:27,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752909686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:27,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:27,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:23:27,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443607447] [2021-11-07 02:23:27,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:27,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:27,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:27,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:27,415 INFO L87 Difference]: Start difference. First operand 14836 states and 21981 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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 02:23:29,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:29,081 INFO L93 Difference]: Finished difference Result 35912 states and 53342 transitions. [2021-11-07 02:23:29,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:29,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 02:23:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:29,193 INFO L225 Difference]: With dead ends: 35912 [2021-11-07 02:23:29,194 INFO L226 Difference]: Without dead ends: 28317 [2021-11-07 02:23:29,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:29,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28317 states. [2021-11-07 02:23:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28317 to 15028. [2021-11-07 02:23:30,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15028 states, 15027 states have (on average 1.4755440207626274) internal successors, (22173), 15027 states have internal predecessors, (22173), 0 states have call successors, (0), 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 02:23:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15028 states to 15028 states and 22173 transitions. [2021-11-07 02:23:30,473 INFO L78 Accepts]: Start accepts. Automaton has 15028 states and 22173 transitions. Word has length 84 [2021-11-07 02:23:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:30,474 INFO L470 AbstractCegarLoop]: Abstraction has 15028 states and 22173 transitions. [2021-11-07 02:23:30,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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 02:23:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 15028 states and 22173 transitions. [2021-11-07 02:23:30,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:23:30,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:30,494 INFO L513 BasicCegarLoop]: trace histogram [3, 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 02:23:30,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:30,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:30,716 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash 341292008, now seen corresponding path program 1 times [2021-11-07 02:23:30,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:30,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39454549] [2021-11-07 02:23:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:30,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:30,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:30,720 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:30,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:23:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:31,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:23:31,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:23:32,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:23:33,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:33,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39454549] [2021-11-07 02:23:33,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39454549] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:33,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:33,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:23:33,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064972784] [2021-11-07 02:23:33,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:33,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:33,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:33,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:23:33,407 INFO L87 Difference]: Start difference. First operand 15028 states and 22173 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 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 02:23:39,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:39,051 INFO L93 Difference]: Finished difference Result 43004 states and 63555 transitions. [2021-11-07 02:23:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:23:39,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have 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 02:23:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:39,167 INFO L225 Difference]: With dead ends: 43004 [2021-11-07 02:23:39,167 INFO L226 Difference]: Without dead ends: 28029 [2021-11-07 02:23:39,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:23:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28029 states. [2021-11-07 02:23:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28029 to 14398. [2021-11-07 02:23:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14398 states, 14397 states have (on average 1.4649579773563937) internal successors, (21091), 14397 states have internal predecessors, (21091), 0 states have call successors, (0), 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 02:23:40,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14398 states to 14398 states and 21091 transitions. [2021-11-07 02:23:40,221 INFO L78 Accepts]: Start accepts. Automaton has 14398 states and 21091 transitions. Word has length 86 [2021-11-07 02:23:40,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:40,222 INFO L470 AbstractCegarLoop]: Abstraction has 14398 states and 21091 transitions. [2021-11-07 02:23:40,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 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 02:23:40,222 INFO L276 IsEmpty]: Start isEmpty. Operand 14398 states and 21091 transitions. [2021-11-07 02:23:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 02:23:40,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:40,246 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-11-07 02:23:40,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:40,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:40,467 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:40,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:40,468 INFO L85 PathProgramCache]: Analyzing trace with hash -265952138, now seen corresponding path program 1 times [2021-11-07 02:23:40,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:40,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858228339] [2021-11-07 02:23:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:40,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:40,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:40,474 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:40,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:23:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:41,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:23:41,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:42,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:42,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:42,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858228339] [2021-11-07 02:23:42,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858228339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:42,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:42,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:23:42,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680311122] [2021-11-07 02:23:42,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:42,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:42,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:42,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:23:42,803 INFO L87 Difference]: Start difference. First operand 14398 states and 21091 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:23:44,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:44,408 INFO L93 Difference]: Finished difference Result 36643 states and 53395 transitions. [2021-11-07 02:23:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:23:44,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-07 02:23:44,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:44,487 INFO L225 Difference]: With dead ends: 36643 [2021-11-07 02:23:44,487 INFO L226 Difference]: Without dead ends: 22298 [2021-11-07 02:23:44,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:23:44,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22298 states. [2021-11-07 02:23:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22298 to 14422. [2021-11-07 02:23:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14422 states, 14421 states have (on average 1.4641841758546563) internal successors, (21115), 14421 states have internal predecessors, (21115), 0 states have call successors, (0), 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 02:23:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14422 states to 14422 states and 21115 transitions. [2021-11-07 02:23:45,809 INFO L78 Accepts]: Start accepts. Automaton has 14422 states and 21115 transitions. Word has length 119 [2021-11-07 02:23:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:45,809 INFO L470 AbstractCegarLoop]: Abstraction has 14422 states and 21115 transitions. [2021-11-07 02:23:45,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:23:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 14422 states and 21115 transitions. [2021-11-07 02:23:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 02:23:45,831 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:45,831 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-11-07 02:23:45,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:46,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:46,047 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:46,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash 464660825, now seen corresponding path program 1 times [2021-11-07 02:23:46,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:46,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561578865] [2021-11-07 02:23:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:46,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:46,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:46,050 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:46,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:23:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:46,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:46,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:47,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:48,445 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:48,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561578865] [2021-11-07 02:23:48,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561578865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:48,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:48,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:23:48,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255875839] [2021-11-07 02:23:48,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:23:48,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:48,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:23:48,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:23:48,447 INFO L87 Difference]: Start difference. First operand 14422 states and 21115 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 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 02:23:51,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:51,872 INFO L93 Difference]: Finished difference Result 43979 states and 64011 transitions. [2021-11-07 02:23:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 02:23:51,873 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 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 126 [2021-11-07 02:23:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:51,945 INFO L225 Difference]: With dead ends: 43979 [2021-11-07 02:23:51,946 INFO L226 Difference]: Without dead ends: 29610 [2021-11-07 02:23:51,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:23:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29610 states. [2021-11-07 02:23:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29610 to 14422. [2021-11-07 02:23:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14422 states, 14421 states have (on average 1.4641841758546563) internal successors, (21115), 14421 states have internal predecessors, (21115), 0 states have call successors, (0), 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 02:23:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14422 states to 14422 states and 21115 transitions. [2021-11-07 02:23:53,293 INFO L78 Accepts]: Start accepts. Automaton has 14422 states and 21115 transitions. Word has length 126 [2021-11-07 02:23:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:53,294 INFO L470 AbstractCegarLoop]: Abstraction has 14422 states and 21115 transitions. [2021-11-07 02:23:53,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 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 02:23:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 14422 states and 21115 transitions. [2021-11-07 02:23:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 02:23:53,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:53,314 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-11-07 02:23:53,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:53,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:53,527 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:53,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:53,527 INFO L85 PathProgramCache]: Analyzing trace with hash -443712689, now seen corresponding path program 1 times [2021-11-07 02:23:53,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:53,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905972352] [2021-11-07 02:23:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:53,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:53,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:53,530 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:53,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:23:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:54,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:23:54,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:56,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:57,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:57,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905972352] [2021-11-07 02:23:57,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905972352] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:57,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:57,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 02:23:57,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895697263] [2021-11-07 02:23:57,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:23:57,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:57,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:23:57,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:23:57,298 INFO L87 Difference]: Start difference. First operand 14422 states and 21115 transitions. Second operand has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:05,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:05,374 INFO L93 Difference]: Finished difference Result 53690 states and 78603 transitions. [2021-11-07 02:24:05,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:24:05,375 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-07 02:24:05,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:05,431 INFO L225 Difference]: With dead ends: 53690 [2021-11-07 02:24:05,431 INFO L226 Difference]: Without dead ends: 39321 [2021-11-07 02:24:05,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:24:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39321 states. [2021-11-07 02:24:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39321 to 14482. [2021-11-07 02:24:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14482 states, 14481 states have (on average 1.4622608935846972) internal successors, (21175), 14481 states have internal predecessors, (21175), 0 states have call successors, (0), 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 02:24:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14482 states to 14482 states and 21175 transitions. [2021-11-07 02:24:06,702 INFO L78 Accepts]: Start accepts. Automaton has 14482 states and 21175 transitions. Word has length 141 [2021-11-07 02:24:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:06,703 INFO L470 AbstractCegarLoop]: Abstraction has 14482 states and 21175 transitions. [2021-11-07 02:24:06,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 14482 states and 21175 transitions. [2021-11-07 02:24:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 02:24:06,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:06,724 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-11-07 02:24:06,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:06,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:06,925 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:24:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:06,925 INFO L85 PathProgramCache]: Analyzing trace with hash 549404179, now seen corresponding path program 1 times [2021-11-07 02:24:06,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:06,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899878714] [2021-11-07 02:24:06,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:06,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:06,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:06,930 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:06,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:24:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:08,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:24:08,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:24:09,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:24:09,939 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:09,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899878714] [2021-11-07 02:24:09,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899878714] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:09,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:09,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:24:09,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42698787] [2021-11-07 02:24:09,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:24:09,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:09,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:24:09,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:24:09,940 INFO L87 Difference]: Start difference. First operand 14482 states and 21175 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 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 02:24:15,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:15,005 INFO L93 Difference]: Finished difference Result 66222 states and 96797 transitions. [2021-11-07 02:24:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:24:15,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 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 143 [2021-11-07 02:24:15,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:15,093 INFO L225 Difference]: With dead ends: 66222 [2021-11-07 02:24:15,093 INFO L226 Difference]: Without dead ends: 51793 [2021-11-07 02:24:15,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:24:15,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51793 states. [2021-11-07 02:24:16,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51793 to 14530. [2021-11-07 02:24:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14530 states, 14529 states have (on average 1.4607337050037856) internal successors, (21223), 14529 states have internal predecessors, (21223), 0 states have call successors, (0), 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 02:24:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14530 states to 14530 states and 21223 transitions. [2021-11-07 02:24:16,636 INFO L78 Accepts]: Start accepts. Automaton has 14530 states and 21223 transitions. Word has length 143 [2021-11-07 02:24:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:16,636 INFO L470 AbstractCegarLoop]: Abstraction has 14530 states and 21223 transitions. [2021-11-07 02:24:16,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 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 02:24:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 14530 states and 21223 transitions. [2021-11-07 02:24:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 02:24:16,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:16,650 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-11-07 02:24:16,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:16,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:16,875 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:24:16,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:16,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1758105866, now seen corresponding path program 1 times [2021-11-07 02:24:16,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:16,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544843261] [2021-11-07 02:24:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:16,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:16,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:16,878 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:16,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:24:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:18,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:24:18,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:24:22,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:24:24,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:24,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544843261] [2021-11-07 02:24:24,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544843261] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:24,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:24,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-07 02:24:24,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053333371] [2021-11-07 02:24:24,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 02:24:24,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:24,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 02:24:24,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:24:24,234 INFO L87 Difference]: Start difference. First operand 14530 states and 21223 transitions. Second operand has 11 states, 11 states have (on average 19.90909090909091) internal successors, (219), 11 states have internal predecessors, (219), 0 states have call successors, (0), 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 02:24:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:38,869 INFO L93 Difference]: Finished difference Result 123871 states and 180787 transitions. [2021-11-07 02:24:38,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 02:24:38,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 19.90909090909091) internal successors, (219), 11 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-07 02:24:38,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:39,173 INFO L225 Difference]: With dead ends: 123871 [2021-11-07 02:24:39,173 INFO L226 Difference]: Without dead ends: 109394 [2021-11-07 02:24:39,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:24:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109394 states. [2021-11-07 02:24:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109394 to 30574. [2021-11-07 02:24:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30574 states, 30573 states have (on average 1.4598829032152554) internal successors, (44633), 30573 states have internal predecessors, (44633), 0 states have call successors, (0), 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 02:24:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30574 states to 30574 states and 44633 transitions. [2021-11-07 02:24:43,505 INFO L78 Accepts]: Start accepts. Automaton has 30574 states and 44633 transitions. Word has length 143 [2021-11-07 02:24:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:43,505 INFO L470 AbstractCegarLoop]: Abstraction has 30574 states and 44633 transitions. [2021-11-07 02:24:43,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.90909090909091) internal successors, (219), 11 states have internal predecessors, (219), 0 states have call successors, (0), 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 02:24:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 30574 states and 44633 transitions. [2021-11-07 02:24:43,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 02:24:43,530 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:43,530 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-11-07 02:24:43,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 02:24:43,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:43,755 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:24:43,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash 691494264, now seen corresponding path program 1 times [2021-11-07 02:24:43,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:43,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013188092] [2021-11-07 02:24:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:43,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:43,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:43,758 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:43,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e4b6f9-41d3-4a61-ac0b-3b75194d37a9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:24:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:45,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:24:45,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:24:46,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:24:46,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:46,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013188092] [2021-11-07 02:24:46,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013188092] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:46,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:46,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:24:46,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900000643] [2021-11-07 02:24:46,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:46,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:46,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:46,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:46,891 INFO L87 Difference]: Start difference. First operand 30574 states and 44633 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)