./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.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_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/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_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/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_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/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 57ba9a4d546a973620a0029f54a814a104db676a0fd0f250dd5545a7c0f94302 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:06,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:06,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:06,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:06,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:06,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:06,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:06,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:06,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:06,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:06,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:06,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:06,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:06,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:06,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:06,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:06,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:06,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:06,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:06,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:06,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:06,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:06,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:06,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:06,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:06,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:06,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:06,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:06,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:06,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:06,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:06,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:06,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:06,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:06,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:06,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:06,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:06,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:06,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:06,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:06,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:06,609 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:44:06,634 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:06,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:06,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:06,636 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:06,636 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:06,636 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:06,636 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:44:06,637 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:06,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:06,637 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:44:06,637 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:44:06,637 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:06,638 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:44:06,638 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:44:06,638 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:44:06,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:06,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:44:06,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:06,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:06,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:06,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:06,640 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:06,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:06,640 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:06,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:06,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:06,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:06,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:06,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:06,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:06,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:06,642 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:44:06,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:44:06,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:06,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:06,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:06,643 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_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57ba9a4d546a973620a0029f54a814a104db676a0fd0f250dd5545a7c0f94302 [2021-11-07 01:44:06,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:06,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:06,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:06,958 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:06,958 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:06,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2021-11-07 01:44:07,053 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/data/c148f1527/8792942c29ef4d87a7196cb48f2affec/FLAG716027f12 [2021-11-07 01:44:07,842 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:07,843 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2021-11-07 01:44:07,885 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/data/c148f1527/8792942c29ef4d87a7196cb48f2affec/FLAG716027f12 [2021-11-07 01:44:07,921 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/data/c148f1527/8792942c29ef4d87a7196cb48f2affec [2021-11-07 01:44:07,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:07,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:07,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:07,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:07,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:07,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:07" (1/1) ... [2021-11-07 01:44:07,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@656f9432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:07, skipping insertion in model container [2021-11-07 01:44:07,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:07" (1/1) ... [2021-11-07 01:44:07,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:08,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:08,685 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:44:08,903 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_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i[101600,101613] [2021-11-07 01:44:09,028 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:44:09,035 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:44:09,040 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:44:09,046 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:44:09,065 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:44:09,083 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:44:09,085 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:44:09,085 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:44:09,090 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:44:09,091 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:44:09,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:09,256 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:44:09,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@465e1b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:09, skipping insertion in model container [2021-11-07 01:44:09,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:09,257 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:44:09,260 INFO L168 Benchmark]: Toolchain (without parser) took 1328.60 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 50.2 MB in the beginning and 83.7 MB in the end (delta: -33.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:09,261 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 92.3 MB. Free memory is still 72.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:44:09,263 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1324.56 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 50.0 MB in the beginning and 83.7 MB in the end (delta: -33.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:09,265 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 92.3 MB. Free memory is still 72.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1324.56 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 50.0 MB in the beginning and 83.7 MB in the end (delta: -33.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3466]: 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_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/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_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/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_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/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 57ba9a4d546a973620a0029f54a814a104db676a0fd0f250dd5545a7c0f94302 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:11,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:11,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:11,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:11,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:11,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:11,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:11,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:11,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:11,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:11,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:11,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:11,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:11,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:11,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:11,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:11,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:11,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:11,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:11,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:11,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:11,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:11,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:11,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:11,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:11,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:11,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:11,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:11,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:11,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:11,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:11,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:11,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:11,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:11,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:11,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:11,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:11,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:11,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:11,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:11,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:11,777 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:44:11,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:11,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:11,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:11,823 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:11,823 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:11,823 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:11,823 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:11,824 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:11,824 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:11,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:11,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:11,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:11,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:11,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:11,827 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:11,828 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:44:11,828 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:44:11,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:11,828 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:11,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:11,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:11,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:44:11,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:11,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:11,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:11,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:11,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:11,830 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:44:11,831 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:11,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:11,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:11,831 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:11,831 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_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57ba9a4d546a973620a0029f54a814a104db676a0fd0f250dd5545a7c0f94302 [2021-11-07 01:44:12,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:12,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:12,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:12,257 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:12,258 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:12,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2021-11-07 01:44:12,334 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/data/fb8ced92b/558115761c4a4815a8655128fe6a57e7/FLAG4ab8cd6f1 [2021-11-07 01:44:13,296 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:13,298 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2021-11-07 01:44:13,340 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/data/fb8ced92b/558115761c4a4815a8655128fe6a57e7/FLAG4ab8cd6f1 [2021-11-07 01:44:13,763 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/data/fb8ced92b/558115761c4a4815a8655128fe6a57e7 [2021-11-07 01:44:13,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:13,767 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:13,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:13,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:13,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:13,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9c61819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13, skipping insertion in model container [2021-11-07 01:44:13,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:13,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:14,497 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_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i[101600,101613] [2021-11-07 01:44:14,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:14,860 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:44:14,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:15,054 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_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i[101600,101613] [2021-11-07 01:44:15,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:15,181 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:44:15,303 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i[101600,101613] [2021-11-07 01:44:15,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:15,497 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:44:15,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:15 WrapperNode [2021-11-07 01:44:15,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:15,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:15,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:44:15,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:44:15,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:15" (1/1) ... [2021-11-07 01:44:15,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:15" (1/1) ... [2021-11-07 01:44:15,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:15,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:44:15,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:44:15,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:44:15,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:15" (1/1) ... [2021-11-07 01:44:15,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:15" (1/1) ... [2021-11-07 01:44:15,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:15" (1/1) ... [2021-11-07 01:44:15,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:15" (1/1) ... [2021-11-07 01:44:15,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:15" (1/1) ... [2021-11-07 01:44:15,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:15" (1/1) ... [2021-11-07 01:44:15,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:15" (1/1) ... [2021-11-07 01:44:15,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:44:15,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:44:15,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:44:15,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:44:15,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:15" (1/1) ... [2021-11-07 01:44:15,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:15,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:15,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:44:15,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:44:15,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:44:15,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:44:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:44:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:44:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:44:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:44:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:44:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:44:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:44:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:44:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:44:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:44:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:44:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 01:44:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:44:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:44:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:44:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:44:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:44:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:44:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:44:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:44:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:44:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:44:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:44:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:44:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:44:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:44:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:44:15,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:44:26,669 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:44:26,670 INFO L299 CfgBuilder]: Removed 333 assume(true) statements. [2021-11-07 01:44:26,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:26 BoogieIcfgContainer [2021-11-07 01:44:26,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:44:26,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:44:26,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:44:26,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:44:26,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:44:13" (1/3) ... [2021-11-07 01:44:26,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a40fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:26, skipping insertion in model container [2021-11-07 01:44:26,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:15" (2/3) ... [2021-11-07 01:44:26,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a40fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:26, skipping insertion in model container [2021-11-07 01:44:26,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:26" (3/3) ... [2021-11-07 01:44:26,684 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2021-11-07 01:44:26,690 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:44:26,691 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:44:26,750 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:44:26,757 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:44:26,758 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:44:26,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 295 states, 288 states have (on average 1.4201388888888888) internal successors, (409), 294 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:26,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 01:44:26,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:26,794 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] [2021-11-07 01:44:26,795 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:26,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:26,801 INFO L85 PathProgramCache]: Analyzing trace with hash 146323834, now seen corresponding path program 1 times [2021-11-07 01:44:26,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:26,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661473623] [2021-11-07 01:44:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:26,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:26,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:26,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:26,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:44:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:27,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:44:27,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:27,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:27,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:27,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661473623] [2021-11-07 01:44:27,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661473623] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:27,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:27,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:27,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37601549] [2021-11-07 01:44:27,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:27,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:27,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:27,904 INFO L87 Difference]: Start difference. First operand has 295 states, 288 states have (on average 1.4201388888888888) internal successors, (409), 294 states have internal predecessors, (409), 0 states have call successors, (0), 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 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:28,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:28,012 INFO L93 Difference]: Finished difference Result 587 states and 815 transitions. [2021-11-07 01:44:28,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:28,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-07 01:44:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:28,029 INFO L225 Difference]: With dead ends: 587 [2021-11-07 01:44:28,032 INFO L226 Difference]: Without dead ends: 287 [2021-11-07 01:44:28,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-07 01:44:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-11-07 01:44:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 281 states have (on average 1.3487544483985765) internal successors, (379), 286 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 379 transitions. [2021-11-07 01:44:28,147 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 379 transitions. Word has length 21 [2021-11-07 01:44:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:28,149 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 379 transitions. [2021-11-07 01:44:28,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 379 transitions. [2021-11-07 01:44:28,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:44:28,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:28,154 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] [2021-11-07 01:44:28,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:28,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:28,376 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:28,377 INFO L85 PathProgramCache]: Analyzing trace with hash -722190854, now seen corresponding path program 1 times [2021-11-07 01:44:28,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:28,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391719346] [2021-11-07 01:44:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:28,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:28,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:28,386 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:28,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:44:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:29,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:29,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:29,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:29,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:29,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391719346] [2021-11-07 01:44:29,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391719346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:29,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1388544867] [2021-11-07 01:44:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:29,807 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:29,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:29,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:29,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-07 01:44:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:30,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:30,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:30,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:30,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1388544867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:30,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:30,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:44:30,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126518179] [2021-11-07 01:44:30,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:30,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:30,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:30,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:44:30,766 INFO L87 Difference]: Start difference. First operand 287 states and 379 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:33,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:33,088 INFO L93 Difference]: Finished difference Result 1007 states and 1356 transitions. [2021-11-07 01:44:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:33,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 01:44:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:33,102 INFO L225 Difference]: With dead ends: 1007 [2021-11-07 01:44:33,104 INFO L226 Difference]: Without dead ends: 742 [2021-11-07 01:44:33,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:44:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-11-07 01:44:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 738. [2021-11-07 01:44:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 732 states have (on average 1.3620218579234973) internal successors, (997), 737 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 997 transitions. [2021-11-07 01:44:33,178 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 997 transitions. Word has length 23 [2021-11-07 01:44:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:33,179 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 997 transitions. [2021-11-07 01:44:33,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 997 transitions. [2021-11-07 01:44:33,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:44:33,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:33,182 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] [2021-11-07 01:44:33,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-07 01:44:33,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:33,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:33,588 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:33,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:33,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1674109708, now seen corresponding path program 1 times [2021-11-07 01:44:33,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:33,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210960258] [2021-11-07 01:44:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:33,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:33,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:33,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:33,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:44:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:34,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:34,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:34,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:35,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:35,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210960258] [2021-11-07 01:44:35,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210960258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:35,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [98253900] [2021-11-07 01:44:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:35,092 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:35,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:35,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:35,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 01:44:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:35,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:44:35,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:36,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:36,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [98253900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:36,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:36,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-07 01:44:36,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819996105] [2021-11-07 01:44:36,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:36,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:36,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:36,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:44:36,616 INFO L87 Difference]: Start difference. First operand 738 states and 997 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:36,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:36,680 INFO L93 Difference]: Finished difference Result 738 states and 997 transitions. [2021-11-07 01:44:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:36,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 01:44:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:36,686 INFO L225 Difference]: With dead ends: 738 [2021-11-07 01:44:36,687 INFO L226 Difference]: Without dead ends: 736 [2021-11-07 01:44:36,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:44:36,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-11-07 01:44:36,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2021-11-07 01:44:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 731 states have (on average 1.3611491108071136) internal successors, (995), 735 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 995 transitions. [2021-11-07 01:44:36,740 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 995 transitions. Word has length 30 [2021-11-07 01:44:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:36,741 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 995 transitions. [2021-11-07 01:44:36,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 995 transitions. [2021-11-07 01:44:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:44:36,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:36,748 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] [2021-11-07 01:44:36,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-07 01:44:36,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:37,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:37,153 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:37,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:37,153 INFO L85 PathProgramCache]: Analyzing trace with hash -357794123, now seen corresponding path program 1 times [2021-11-07 01:44:37,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:37,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390111728] [2021-11-07 01:44:37,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:37,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:37,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:37,156 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:37,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:44:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:37,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:37,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:38,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:38,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:38,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390111728] [2021-11-07 01:44:38,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390111728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:38,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1020319757] [2021-11-07 01:44:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:38,332 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:38,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:38,336 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:38,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:44:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:38,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:38,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:39,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:39,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1020319757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:39,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:39,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-07 01:44:39,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899389404] [2021-11-07 01:44:39,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:39,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:39,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:39,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:44:39,735 INFO L87 Difference]: Start difference. First operand 736 states and 995 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:39,791 INFO L93 Difference]: Finished difference Result 736 states and 995 transitions. [2021-11-07 01:44:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:39,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 01:44:39,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:39,797 INFO L225 Difference]: With dead ends: 736 [2021-11-07 01:44:39,797 INFO L226 Difference]: Without dead ends: 734 [2021-11-07 01:44:39,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:44:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-07 01:44:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2021-11-07 01:44:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 730 states have (on average 1.3602739726027397) internal successors, (993), 733 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 993 transitions. [2021-11-07 01:44:39,854 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 993 transitions. Word has length 31 [2021-11-07 01:44:39,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:39,854 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 993 transitions. [2021-11-07 01:44:39,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:39,854 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 993 transitions. [2021-11-07 01:44:39,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:44:39,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:39,856 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] [2021-11-07 01:44:39,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:40,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:40,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:40,277 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:40,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:40,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1793283358, now seen corresponding path program 1 times [2021-11-07 01:44:40,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:40,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448175042] [2021-11-07 01:44:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:40,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:40,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:40,280 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:40,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:44:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:41,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:41,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:41,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:41,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:41,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448175042] [2021-11-07 01:44:41,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448175042] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:41,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [213577057] [2021-11-07 01:44:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:41,676 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:41,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:41,680 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:41,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 01:44:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:42,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:42,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:42,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:42,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [213577057] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:42,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:42,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:44:42,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697214436] [2021-11-07 01:44:42,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:42,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:42,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:42,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:44:42,855 INFO L87 Difference]: Start difference. First operand 734 states and 993 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:42,914 INFO L93 Difference]: Finished difference Result 734 states and 993 transitions. [2021-11-07 01:44:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:42,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 01:44:42,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:42,922 INFO L225 Difference]: With dead ends: 734 [2021-11-07 01:44:42,922 INFO L226 Difference]: Without dead ends: 732 [2021-11-07 01:44:42,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:44:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-11-07 01:44:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2021-11-07 01:44:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 729 states have (on average 1.3593964334705075) internal successors, (991), 731 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 991 transitions. [2021-11-07 01:44:42,989 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 991 transitions. Word has length 32 [2021-11-07 01:44:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:42,989 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 991 transitions. [2021-11-07 01:44:42,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 991 transitions. [2021-11-07 01:44:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:44:42,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:42,992 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] [2021-11-07 01:44:43,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:43,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:43,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:43,415 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:43,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:43,415 INFO L85 PathProgramCache]: Analyzing trace with hash -242791457, now seen corresponding path program 1 times [2021-11-07 01:44:43,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:43,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527148261] [2021-11-07 01:44:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:43,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:43,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:43,418 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:43,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:44:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:44,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:44,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:44,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:44,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:44,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527148261] [2021-11-07 01:44:44,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527148261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:44,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1152372049] [2021-11-07 01:44:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:44,716 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:44,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:44,717 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:44,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 01:44:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:45,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:45,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:45,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:45,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1152372049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:45,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:45,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:44:45,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430020167] [2021-11-07 01:44:45,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:45,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:45,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:45,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:44:45,826 INFO L87 Difference]: Start difference. First operand 732 states and 991 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:45,945 INFO L93 Difference]: Finished difference Result 2141 states and 2912 transitions. [2021-11-07 01:44:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:45,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 01:44:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:45,955 INFO L225 Difference]: With dead ends: 2141 [2021-11-07 01:44:45,955 INFO L226 Difference]: Without dead ends: 1431 [2021-11-07 01:44:45,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:44:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-11-07 01:44:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1427. [2021-11-07 01:44:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1424 states have (on average 1.3623595505617978) internal successors, (1940), 1426 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 1940 transitions. [2021-11-07 01:44:46,071 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 1940 transitions. Word has length 33 [2021-11-07 01:44:46,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:46,073 INFO L470 AbstractCegarLoop]: Abstraction has 1427 states and 1940 transitions. [2021-11-07 01:44:46,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:46,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 1940 transitions. [2021-11-07 01:44:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:44:46,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:46,075 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] [2021-11-07 01:44:46,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:46,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:46,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:46,491 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:46,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1063398728, now seen corresponding path program 1 times [2021-11-07 01:44:46,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:46,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057064002] [2021-11-07 01:44:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:46,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:46,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:46,493 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:46,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:44:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:47,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:47,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:47,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:47,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:47,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057064002] [2021-11-07 01:44:47,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057064002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:47,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1952322605] [2021-11-07 01:44:47,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:47,882 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:47,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:47,883 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:47,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:44:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:48,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:48,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:48,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:49,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1952322605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:49,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:49,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:44:49,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950900706] [2021-11-07 01:44:49,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:49,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:49,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:49,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:44:49,122 INFO L87 Difference]: Start difference. First operand 1427 states and 1940 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:49,224 INFO L93 Difference]: Finished difference Result 1427 states and 1940 transitions. [2021-11-07 01:44:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:49,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 01:44:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:49,235 INFO L225 Difference]: With dead ends: 1427 [2021-11-07 01:44:49,235 INFO L226 Difference]: Without dead ends: 1418 [2021-11-07 01:44:49,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:44:49,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-11-07 01:44:49,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1418. [2021-11-07 01:44:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1416 states have (on average 1.3615819209039548) internal successors, (1928), 1417 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 1928 transitions. [2021-11-07 01:44:49,380 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 1928 transitions. Word has length 34 [2021-11-07 01:44:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:49,381 INFO L470 AbstractCegarLoop]: Abstraction has 1418 states and 1928 transitions. [2021-11-07 01:44:49,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 1928 transitions. [2021-11-07 01:44:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:44:49,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:49,385 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] [2021-11-07 01:44:49,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:49,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:49,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:49,803 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:49,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:49,804 INFO L85 PathProgramCache]: Analyzing trace with hash 949793813, now seen corresponding path program 1 times [2021-11-07 01:44:49,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:49,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221443914] [2021-11-07 01:44:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:49,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:49,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:49,808 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:49,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:44:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:50,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:50,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:51,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:51,614 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:51,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221443914] [2021-11-07 01:44:51,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221443914] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:51,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [540585452] [2021-11-07 01:44:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:51,614 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:51,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:51,626 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:51,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 01:44:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:52,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:52,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:52,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:52,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [540585452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:52,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:52,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:44:52,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096448691] [2021-11-07 01:44:52,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:52,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:52,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:44:52,839 INFO L87 Difference]: Start difference. First operand 1418 states and 1928 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:53,117 INFO L93 Difference]: Finished difference Result 3480 states and 4725 transitions. [2021-11-07 01:44:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:53,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:44:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:53,136 INFO L225 Difference]: With dead ends: 3480 [2021-11-07 01:44:53,136 INFO L226 Difference]: Without dead ends: 2084 [2021-11-07 01:44:53,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:44:53,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-11-07 01:44:53,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1970. [2021-11-07 01:44:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1968 states have (on average 1.3551829268292683) internal successors, (2667), 1969 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 2667 transitions. [2021-11-07 01:44:53,307 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 2667 transitions. Word has length 60 [2021-11-07 01:44:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:53,308 INFO L470 AbstractCegarLoop]: Abstraction has 1970 states and 2667 transitions. [2021-11-07 01:44:53,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 2667 transitions. [2021-11-07 01:44:53,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:44:53,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:53,313 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:44:53,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:53,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:53,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:53,721 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:53,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:53,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1910980798, now seen corresponding path program 1 times [2021-11-07 01:44:53,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:53,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465539955] [2021-11-07 01:44:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:53,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:53,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:53,723 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:53,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:44:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:54,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:54,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:44:55,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:44:55,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:55,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465539955] [2021-11-07 01:44:55,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465539955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:55,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [705837995] [2021-11-07 01:44:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:55,480 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:55,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:55,481 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:55,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 01:44:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:56,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:44:56,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:56,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:56,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [705837995] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:56,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:56,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 01:44:56,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874213526] [2021-11-07 01:44:56,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:56,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:56,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:56,782 INFO L87 Difference]: Start difference. First operand 1970 states and 2667 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 01:44:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:57,365 INFO L93 Difference]: Finished difference Result 5591 states and 7561 transitions. [2021-11-07 01:44:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 78 [2021-11-07 01:44:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:57,394 INFO L225 Difference]: With dead ends: 5591 [2021-11-07 01:44:57,394 INFO L226 Difference]: Without dead ends: 4555 [2021-11-07 01:44:57,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:44:57,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2021-11-07 01:44:57,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 1982. [2021-11-07 01:44:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1980 states have (on average 1.353030303030303) internal successors, (2679), 1981 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2679 transitions. [2021-11-07 01:44:57,630 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2679 transitions. Word has length 78 [2021-11-07 01:44:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:57,630 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 2679 transitions. [2021-11-07 01:44:57,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 01:44:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2679 transitions. [2021-11-07 01:44:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:57,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:57,634 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:57,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:57,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:58,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:58,067 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:58,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash 155402276, now seen corresponding path program 1 times [2021-11-07 01:44:58,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:58,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180185287] [2021-11-07 01:44:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:58,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:58,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:58,072 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:58,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:44:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:59,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:59,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:59,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:45:00,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:00,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180185287] [2021-11-07 01:45:00,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180185287] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:00,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [988409242] [2021-11-07 01:45:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:00,149 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:00,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:00,151 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:00,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 01:45:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:01,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:45:01,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:01,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:01,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [988409242] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:01,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:01,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 01:45:01,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121301465] [2021-11-07 01:45:01,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:45:01,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:01,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:45:01,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:01,771 INFO L87 Difference]: Start difference. First operand 1982 states and 2679 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:02,611 INFO L93 Difference]: Finished difference Result 8945 states and 12048 transitions. [2021-11-07 01:45:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:45:02,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:45:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:02,667 INFO L225 Difference]: With dead ends: 8945 [2021-11-07 01:45:02,668 INFO L226 Difference]: Without dead ends: 7896 [2021-11-07 01:45:02,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:45:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7896 states. [2021-11-07 01:45:03,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7896 to 1994. [2021-11-07 01:45:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1992 states have (on average 1.3509036144578312) internal successors, (2691), 1993 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 2691 transitions. [2021-11-07 01:45:03,063 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 2691 transitions. Word has length 79 [2021-11-07 01:45:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:03,063 INFO L470 AbstractCegarLoop]: Abstraction has 1994 states and 2691 transitions. [2021-11-07 01:45:03,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 2691 transitions. [2021-11-07 01:45:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:45:03,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:03,067 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:03,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:03,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:03,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:03,473 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:45:03,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:03,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1629764777, now seen corresponding path program 1 times [2021-11-07 01:45:03,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:03,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849486874] [2021-11-07 01:45:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:03,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:03,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:03,476 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:03,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:45:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:04,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:45:04,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:45:04,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:45:05,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:05,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849486874] [2021-11-07 01:45:05,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849486874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:05,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [935278823] [2021-11-07 01:45:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:05,405 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:05,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:05,407 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:05,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:45:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:06,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:45:06,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:07,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:07,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [935278823] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:07,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:07,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5, 5] total 15 [2021-11-07 01:45:07,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228668299] [2021-11-07 01:45:07,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:45:07,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:07,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:45:07,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:45:07,513 INFO L87 Difference]: Start difference. First operand 1994 states and 2691 transitions. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:15,010 INFO L93 Difference]: Finished difference Result 10829 states and 14603 transitions. [2021-11-07 01:45:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:45:15,011 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:45:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:15,055 INFO L225 Difference]: With dead ends: 10829 [2021-11-07 01:45:15,055 INFO L226 Difference]: Without dead ends: 8857 [2021-11-07 01:45:15,060 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:45:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8857 states. [2021-11-07 01:45:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8857 to 2012. [2021-11-07 01:45:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2010 states have (on average 1.3477611940298508) internal successors, (2709), 2011 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 2709 transitions. [2021-11-07 01:45:15,405 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 2709 transitions. Word has length 81 [2021-11-07 01:45:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:15,406 INFO L470 AbstractCegarLoop]: Abstraction has 2012 states and 2709 transitions. [2021-11-07 01:45:15,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:15,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 2709 transitions. [2021-11-07 01:45:15,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:45:15,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:15,409 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:15,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:15,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:15,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:15,816 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:45:15,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:15,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1458072837, now seen corresponding path program 1 times [2021-11-07 01:45:15,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:15,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297812787] [2021-11-07 01:45:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:15,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:15,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:15,818 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:15,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:45:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:16,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:45:16,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:45:17,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:45:17,740 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:17,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297812787] [2021-11-07 01:45:17,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297812787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:17,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [861295524] [2021-11-07 01:45:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:17,740 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:17,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:17,741 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:17,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:45:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:45:19,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:19,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:20,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [861295524] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:20,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:20,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5, 5] total 17 [2021-11-07 01:45:20,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498364533] [2021-11-07 01:45:20,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:45:20,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:45:20,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:45:20,725 INFO L87 Difference]: Start difference. First operand 2012 states and 2709 transitions. Second operand has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:26,598 INFO L93 Difference]: Finished difference Result 19769 states and 27133 transitions. [2021-11-07 01:45:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:45:26,599 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:45:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:26,639 INFO L225 Difference]: With dead ends: 19769 [2021-11-07 01:45:26,640 INFO L226 Difference]: Without dead ends: 17779 [2021-11-07 01:45:26,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:45:26,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17779 states. [2021-11-07 01:45:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17779 to 3196. [2021-11-07 01:45:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 3194 states have (on average 1.3688165309956168) internal successors, (4372), 3195 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 4372 transitions. [2021-11-07 01:45:27,274 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 4372 transitions. Word has length 83 [2021-11-07 01:45:27,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:27,275 INFO L470 AbstractCegarLoop]: Abstraction has 3196 states and 4372 transitions. [2021-11-07 01:45:27,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:27,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 4372 transitions. [2021-11-07 01:45:27,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 01:45:27,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:27,279 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:45:27,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:27,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:27,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:27,695 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:45:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:27,695 INFO L85 PathProgramCache]: Analyzing trace with hash -809153503, now seen corresponding path program 1 times [2021-11-07 01:45:27,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:27,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441072363] [2021-11-07 01:45:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:27,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:27,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:27,697 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:27,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:45:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:28,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:45:28,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:45:29,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:45:29,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:29,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441072363] [2021-11-07 01:45:29,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441072363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:29,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [823206678] [2021-11-07 01:45:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:29,935 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:29,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:29,936 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:29,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:45:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:31,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:45:31,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:31,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:31,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [823206678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:31,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:31,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:45:31,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109548647] [2021-11-07 01:45:31,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:45:31,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:45:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:45:31,846 INFO L87 Difference]: Start difference. First operand 3196 states and 4372 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:32,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:32,560 INFO L93 Difference]: Finished difference Result 7747 states and 10632 transitions. [2021-11-07 01:45:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:32,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-07 01:45:32,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:32,570 INFO L225 Difference]: With dead ends: 7747 [2021-11-07 01:45:32,570 INFO L226 Difference]: Without dead ends: 4573 [2021-11-07 01:45:32,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:45:32,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4573 states. [2021-11-07 01:45:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4573 to 4485. [2021-11-07 01:45:33,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4485 states, 4483 states have (on average 1.3729645326790096) internal successors, (6155), 4484 states have internal predecessors, (6155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 6155 transitions. [2021-11-07 01:45:33,352 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 6155 transitions. Word has length 110 [2021-11-07 01:45:33,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:33,352 INFO L470 AbstractCegarLoop]: Abstraction has 4485 states and 6155 transitions. [2021-11-07 01:45:33,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 6155 transitions. [2021-11-07 01:45:33,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 01:45:33,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:33,359 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:45:33,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:33,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:33,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:33,766 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:45:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash 925520107, now seen corresponding path program 2 times [2021-11-07 01:45:33,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:33,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657386781] [2021-11-07 01:45:33,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:45:33,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:33,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:33,768 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:33,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:45:35,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 01:45:35,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:35,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:45:35,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:45:35,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:45:35,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:35,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657386781] [2021-11-07 01:45:35,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657386781] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:35,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:35,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:45:35,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997938160] [2021-11-07 01:45:35,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:35,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:35,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:35,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:35,566 INFO L87 Difference]: Start difference. First operand 4485 states and 6155 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:36,449 INFO L93 Difference]: Finished difference Result 10632 states and 14558 transitions. [2021-11-07 01:45:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:36,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-07 01:45:36,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:36,460 INFO L225 Difference]: With dead ends: 10632 [2021-11-07 01:45:36,461 INFO L226 Difference]: Without dead ends: 6169 [2021-11-07 01:45:36,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:36,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6169 states. [2021-11-07 01:45:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6169 to 4449. [2021-11-07 01:45:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4447 states have (on average 1.3678884641331235) internal successors, (6083), 4448 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 6083 transitions. [2021-11-07 01:45:37,272 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 6083 transitions. Word has length 110 [2021-11-07 01:45:37,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:37,273 INFO L470 AbstractCegarLoop]: Abstraction has 4449 states and 6083 transitions. [2021-11-07 01:45:37,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 6083 transitions. [2021-11-07 01:45:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 01:45:37,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:37,281 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:45:37,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:37,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:37,494 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:45:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:37,495 INFO L85 PathProgramCache]: Analyzing trace with hash -542518037, now seen corresponding path program 1 times [2021-11-07 01:45:37,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:37,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877092983] [2021-11-07 01:45:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:37,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:37,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:37,498 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:37,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:45:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:39,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:45:39,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:45:39,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:45:39,974 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:39,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877092983] [2021-11-07 01:45:39,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877092983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:39,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1308528666] [2021-11-07 01:45:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:39,974 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:39,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:39,984 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:39,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:45:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:41,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:45:41,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:45:41,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:45:42,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1308528666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:42,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:42,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5, 5] total 13 [2021-11-07 01:45:42,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076383562] [2021-11-07 01:45:42,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:45:42,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:42,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:45:42,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:45:42,375 INFO L87 Difference]: Start difference. First operand 4449 states and 6083 transitions. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:45,343 INFO L93 Difference]: Finished difference Result 11798 states and 16229 transitions. [2021-11-07 01:45:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:45:45,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-07 01:45:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:45,352 INFO L225 Difference]: With dead ends: 11798 [2021-11-07 01:45:45,352 INFO L226 Difference]: Without dead ends: 7327 [2021-11-07 01:45:45,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:45:45,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7327 states. [2021-11-07 01:45:45,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7327 to 4449. [2021-11-07 01:45:46,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4447 states have (on average 1.3629413087474702) internal successors, (6061), 4448 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 6061 transitions. [2021-11-07 01:45:46,010 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 6061 transitions. Word has length 110 [2021-11-07 01:45:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:46,010 INFO L470 AbstractCegarLoop]: Abstraction has 4449 states and 6061 transitions. [2021-11-07 01:45:46,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 6061 transitions. [2021-11-07 01:45:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 01:45:46,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:46,018 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:46,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:46,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:46,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:46,426 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:45:46,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:46,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1185281681, now seen corresponding path program 1 times [2021-11-07 01:45:46,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:46,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965825796] [2021-11-07 01:45:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:46,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:46,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:46,429 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:46,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:45:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:47,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:45:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:45:48,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:45:48,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:48,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965825796] [2021-11-07 01:45:48,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965825796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:48,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1574597191] [2021-11-07 01:45:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:48,772 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:48,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:48,773 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:48,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:45:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:50,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:45:50,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:45:51,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:45:51,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1574597191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:51,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:51,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [5, 5] total 19 [2021-11-07 01:45:51,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157433322] [2021-11-07 01:45:51,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:45:51,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:51,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:45:51,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:45:51,939 INFO L87 Difference]: Start difference. First operand 4449 states and 6061 transitions. Second operand has 13 states, 13 states have (on average 9.538461538461538) internal successors, (124), 13 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:12,004 INFO L93 Difference]: Finished difference Result 34726 states and 48497 transitions. [2021-11-07 01:46:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:46:12,006 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.538461538461538) internal successors, (124), 13 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-07 01:46:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:12,039 INFO L225 Difference]: With dead ends: 34726 [2021-11-07 01:46:12,039 INFO L226 Difference]: Without dead ends: 30299 [2021-11-07 01:46:12,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-11-07 01:46:12,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30299 states. [2021-11-07 01:46:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30299 to 4559. [2021-11-07 01:46:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4559 states, 4557 states have (on average 1.3541803818301514) internal successors, (6171), 4558 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:13,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 6171 transitions. [2021-11-07 01:46:13,379 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 6171 transitions. Word has length 112 [2021-11-07 01:46:13,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:13,380 INFO L470 AbstractCegarLoop]: Abstraction has 4559 states and 6171 transitions. [2021-11-07 01:46:13,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.538461538461538) internal successors, (124), 13 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 6171 transitions. [2021-11-07 01:46:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 01:46:13,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:13,386 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:13,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:13,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:13,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:13,799 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:46:13,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:13,799 INFO L85 PathProgramCache]: Analyzing trace with hash 3978763, now seen corresponding path program 1 times [2021-11-07 01:46:13,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:13,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526562651] [2021-11-07 01:46:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:13,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:13,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:13,801 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:13,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:46:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:15,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:46:15,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:46:15,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:46:16,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:16,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526562651] [2021-11-07 01:46:16,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526562651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:16,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1545551689] [2021-11-07 01:46:16,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:16,356 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:16,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:16,357 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:16,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 01:46:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:18,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:18,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:46:18,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:46:18,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1545551689] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:18,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:18,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 01:46:18,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400611805] [2021-11-07 01:46:18,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:46:18,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:18,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:46:18,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:18,664 INFO L87 Difference]: Start difference. First operand 4559 states and 6171 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:21,538 INFO L93 Difference]: Finished difference Result 9108 states and 12340 transitions. [2021-11-07 01:46:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:46:21,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-07 01:46:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:21,545 INFO L225 Difference]: With dead ends: 9108 [2021-11-07 01:46:21,546 INFO L226 Difference]: Without dead ends: 4571 [2021-11-07 01:46:21,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:46:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2021-11-07 01:46:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4571. [2021-11-07 01:46:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4569 states have (on average 1.3532501641497046) internal successors, (6183), 4570 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 6183 transitions. [2021-11-07 01:46:22,488 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 6183 transitions. Word has length 114 [2021-11-07 01:46:22,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:22,488 INFO L470 AbstractCegarLoop]: Abstraction has 4571 states and 6183 transitions. [2021-11-07 01:46:22,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 6183 transitions. [2021-11-07 01:46:22,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 01:46:22,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:22,495 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:46:22,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:22,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:22,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:22,904 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:46:22,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:22,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1862294797, now seen corresponding path program 1 times [2021-11-07 01:46:22,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:22,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133353349] [2021-11-07 01:46:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:22,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:22,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:22,907 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:22,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:46:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:24,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:46:24,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:46:25,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:46:25,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:25,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133353349] [2021-11-07 01:46:25,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133353349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:25,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1439498899] [2021-11-07 01:46:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:25,930 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:25,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:25,931 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:25,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 01:46:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:28,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:28,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:46:28,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:46:28,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1439498899] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:28,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:28,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:46:28,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894819154] [2021-11-07 01:46:28,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:46:28,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:28,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:46:28,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:46:28,842 INFO L87 Difference]: Start difference. First operand 4571 states and 6183 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:32,189 INFO L93 Difference]: Finished difference Result 10926 states and 14774 transitions. [2021-11-07 01:46:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:46:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-07 01:46:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:32,198 INFO L225 Difference]: With dead ends: 10926 [2021-11-07 01:46:32,198 INFO L226 Difference]: Without dead ends: 6377 [2021-11-07 01:46:32,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:46:32,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6377 states. [2021-11-07 01:46:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6377 to 4595. [2021-11-07 01:46:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 4593 states have (on average 1.3514043109079033) internal successors, (6207), 4594 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 6207 transitions. [2021-11-07 01:46:33,240 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 6207 transitions. Word has length 115 [2021-11-07 01:46:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:33,241 INFO L470 AbstractCegarLoop]: Abstraction has 4595 states and 6207 transitions. [2021-11-07 01:46:33,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 6207 transitions. [2021-11-07 01:46:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 01:46:33,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:33,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:33,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:33,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:33,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:33,663 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:46:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:33,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1107041843, now seen corresponding path program 1 times [2021-11-07 01:46:33,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:33,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478717840] [2021-11-07 01:46:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:33,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:33,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:33,667 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:33,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 01:46:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:35,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:46:35,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:46:36,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:46:36,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:36,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478717840] [2021-11-07 01:46:36,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478717840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:36,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [712997324] [2021-11-07 01:46:36,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:36,978 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:36,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:36,980 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:36,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-07 01:46:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:39,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:39,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:46:39,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:46:39,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [712997324] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:39,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:39,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:46:39,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347165544] [2021-11-07 01:46:39,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:46:39,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:39,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:46:39,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:46:39,993 INFO L87 Difference]: Start difference. First operand 4595 states and 6207 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:43,283 INFO L93 Difference]: Finished difference Result 16997 states and 22960 transitions. [2021-11-07 01:46:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:46:43,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-07 01:46:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:43,302 INFO L225 Difference]: With dead ends: 16997 [2021-11-07 01:46:43,302 INFO L226 Difference]: Without dead ends: 12424 [2021-11-07 01:46:43,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:46:43,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12424 states. [2021-11-07 01:46:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12424 to 4655. [2021-11-07 01:46:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4653 states have (on average 1.3494519664732432) internal successors, (6279), 4654 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 6279 transitions. [2021-11-07 01:46:44,387 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 6279 transitions. Word has length 117 [2021-11-07 01:46:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:44,388 INFO L470 AbstractCegarLoop]: Abstraction has 4655 states and 6279 transitions. [2021-11-07 01:46:44,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:44,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 6279 transitions. [2021-11-07 01:46:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-07 01:46:44,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:44,394 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:46:44,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:44,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:44,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:44,811 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:46:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:44,811 INFO L85 PathProgramCache]: Analyzing trace with hash -936224301, now seen corresponding path program 1 times [2021-11-07 01:46:44,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:44,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479166678] [2021-11-07 01:46:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:44,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:44,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:44,814 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:44,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-07 01:46:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:47,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:46:47,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:46:47,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:46:48,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:48,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479166678] [2021-11-07 01:46:48,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479166678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:48,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [997033630] [2021-11-07 01:46:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:48,300 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:48,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:48,307 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:48,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-07 01:46:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:50,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:50,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:46:51,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:46:51,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [997033630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:51,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:51,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:46:51,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918342212] [2021-11-07 01:46:51,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:46:51,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:51,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:46:51,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:46:51,524 INFO L87 Difference]: Start difference. First operand 4655 states and 6279 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:55,157 INFO L93 Difference]: Finished difference Result 17264 states and 23294 transitions. [2021-11-07 01:46:55,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:46:55,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-07 01:46:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:55,172 INFO L225 Difference]: With dead ends: 17264 [2021-11-07 01:46:55,172 INFO L226 Difference]: Without dead ends: 12631 [2021-11-07 01:46:55,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:46:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-11-07 01:46:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 4703. [2021-11-07 01:46:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4701 states have (on average 1.3484365028717293) internal successors, (6339), 4702 states have internal predecessors, (6339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 6339 transitions. [2021-11-07 01:46:56,026 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 6339 transitions. Word has length 123 [2021-11-07 01:46:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:56,027 INFO L470 AbstractCegarLoop]: Abstraction has 4703 states and 6339 transitions. [2021-11-07 01:46:56,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 6339 transitions. [2021-11-07 01:46:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-07 01:46:56,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:56,031 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:56,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:56,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:56,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:56,455 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:46:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1083934573, now seen corresponding path program 1 times [2021-11-07 01:46:56,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:56,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668594304] [2021-11-07 01:46:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:56,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:56,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:56,457 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:56,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-07 01:46:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:58,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:46:58,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:46:58,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:46:59,503 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:59,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668594304] [2021-11-07 01:46:59,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668594304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:59,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [320993587] [2021-11-07 01:46:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:59,504 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:59,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:59,506 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:59,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-07 01:47:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:02,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:47:02,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:47:03,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:47:03,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [320993587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:03,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151835249] [2021-11-07 01:47:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:03,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:47:03,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:47:03,471 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:47:03,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 01:47:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:05,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:47:05,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:47:06,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:47:06,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151835249] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:06,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:47:06,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-07 01:47:06,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390670849] [2021-11-07 01:47:06,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:47:06,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:06,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:47:06,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:47:06,471 INFO L87 Difference]: Start difference. First operand 4703 states and 6339 transitions. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:13,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:13,351 INFO L93 Difference]: Finished difference Result 34838 states and 47434 transitions. [2021-11-07 01:47:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:47:13,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-11-07 01:47:13,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:13,396 INFO L225 Difference]: With dead ends: 34838 [2021-11-07 01:47:13,397 INFO L226 Difference]: Without dead ends: 32329 [2021-11-07 01:47:13,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:47:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32329 states. [2021-11-07 01:47:14,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32329 to 4943. [2021-11-07 01:47:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4943 states, 4941 states have (on average 1.3485124468731027) internal successors, (6663), 4942 states have internal predecessors, (6663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4943 states to 4943 states and 6663 transitions. [2021-11-07 01:47:14,745 INFO L78 Accepts]: Start accepts. Automaton has 4943 states and 6663 transitions. Word has length 129 [2021-11-07 01:47:14,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:14,746 INFO L470 AbstractCegarLoop]: Abstraction has 4943 states and 6663 transitions. [2021-11-07 01:47:14,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4943 states and 6663 transitions. [2021-11-07 01:47:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 01:47:14,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:14,751 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-11-07 01:47:14,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:15,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:15,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:15,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:15,367 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:47:15,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:15,368 INFO L85 PathProgramCache]: Analyzing trace with hash 172366326, now seen corresponding path program 1 times [2021-11-07 01:47:15,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:15,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604103756] [2021-11-07 01:47:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:15,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:15,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:15,370 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:15,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-07 01:47:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:17,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:47:17,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:47:18,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:47:19,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:19,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604103756] [2021-11-07 01:47:19,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604103756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:19,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [498114336] [2021-11-07 01:47:19,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:19,244 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:19,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:47:19,250 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:47:19,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-07 01:47:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:22,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:47:22,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:47:22,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:47:23,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [498114336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:23,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:47:23,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:47:23,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814844691] [2021-11-07 01:47:23,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:47:23,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:23,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:47:23,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:47:23,116 INFO L87 Difference]: Start difference. First operand 4943 states and 6663 transitions. Second operand has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:32,867 INFO L93 Difference]: Finished difference Result 32088 states and 43362 transitions. [2021-11-07 01:47:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:47:32,880 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-07 01:47:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:32,920 INFO L225 Difference]: With dead ends: 32088 [2021-11-07 01:47:32,920 INFO L226 Difference]: Without dead ends: 27167 [2021-11-07 01:47:32,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:47:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27167 states. [2021-11-07 01:47:34,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27167 to 4967. [2021-11-07 01:47:34,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4967 states, 4965 states have (on average 1.3434038267875126) internal successors, (6670), 4966 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4967 states to 4967 states and 6670 transitions. [2021-11-07 01:47:34,372 INFO L78 Accepts]: Start accepts. Automaton has 4967 states and 6670 transitions. Word has length 130 [2021-11-07 01:47:34,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:34,372 INFO L470 AbstractCegarLoop]: Abstraction has 4967 states and 6670 transitions. [2021-11-07 01:47:34,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4967 states and 6670 transitions. [2021-11-07 01:47:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 01:47:34,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:34,379 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-11-07 01:47:34,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:34,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:34,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:34,792 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:47:34,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash -838750924, now seen corresponding path program 1 times [2021-11-07 01:47:34,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:34,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64467013] [2021-11-07 01:47:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:34,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:34,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:34,795 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:34,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-07 01:47:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:37,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:47:37,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:47:37,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:47:38,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:38,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64467013] [2021-11-07 01:47:38,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64467013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:38,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1717220052] [2021-11-07 01:47:38,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:38,525 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:38,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:47:38,526 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:47:38,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-07 01:47:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:41,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:47:41,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:47:42,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:47:42,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1717220052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:42,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157907734] [2021-11-07 01:47:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:42,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:47:42,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:47:42,730 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:47:42,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 01:47:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:45,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:47:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:47:46,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:47:46,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157907734] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:46,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:47:46,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 4, 4, 4] total 12 [2021-11-07 01:47:46,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357003347] [2021-11-07 01:47:46,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:47:46,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:46,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:47:46,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:47:46,848 INFO L87 Difference]: Start difference. First operand 4967 states and 6670 transitions. Second operand has 12 states, 12 states have (on average 28.583333333333332) internal successors, (343), 12 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:57,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:57,082 INFO L93 Difference]: Finished difference Result 34630 states and 46529 transitions. [2021-11-07 01:47:57,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:47:57,082 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 28.583333333333332) internal successors, (343), 12 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-07 01:47:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:57,122 INFO L225 Difference]: With dead ends: 34630 [2021-11-07 01:47:57,122 INFO L226 Difference]: Without dead ends: 29684 [2021-11-07 01:47:57,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 764 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:47:57,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29684 states. [2021-11-07 01:48:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29684 to 28423. [2021-11-07 01:48:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28423 states, 28421 states have (on average 1.3505154639175259) internal successors, (38383), 28422 states have internal predecessors, (38383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28423 states to 28423 states and 38383 transitions. [2021-11-07 01:48:04,354 INFO L78 Accepts]: Start accepts. Automaton has 28423 states and 38383 transitions. Word has length 130 [2021-11-07 01:48:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:04,354 INFO L470 AbstractCegarLoop]: Abstraction has 28423 states and 38383 transitions. [2021-11-07 01:48:04,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 28.583333333333332) internal successors, (343), 12 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 28423 states and 38383 transitions. [2021-11-07 01:48:04,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:48:04,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:04,378 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:04,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:04,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:04,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:04,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:04,979 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:04,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:04,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1798533490, now seen corresponding path program 1 times [2021-11-07 01:48:04,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:04,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490324484] [2021-11-07 01:48:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:04,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:04,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:04,982 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:04,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445b7b01-c3a5-4eb2-9664-d43d5a69fed6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-07 01:48:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:08,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:48:08,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:48:08,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:48:08,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:08,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490324484] [2021-11-07 01:48:08,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490324484] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:08,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:08,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:48:08,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006051386] [2021-11-07 01:48:08,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:08,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:08,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:08,759 INFO L87 Difference]: Start difference. First operand 28423 states and 38383 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:27,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:27,559 INFO L93 Difference]: Finished difference Result 105053 states and 142392 transitions. [2021-11-07 01:48:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:48:27,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-07 01:48:27,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:27,818 INFO L225 Difference]: With dead ends: 105053 [2021-11-07 01:48:27,818 INFO L226 Difference]: Without dead ends: 76654 [2021-11-07 01:48:27,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:48:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76654 states.