./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1cfba800a850f13ff72fddf9946e31aec208a19aa4b82d402046e12670b66199 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:07:12,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:07:12,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:07:12,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:07:12,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:07:12,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:07:12,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:07:12,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:07:12,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:07:12,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:07:12,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:07:12,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:07:12,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:07:12,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:07:12,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:07:12,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:07:12,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:07:12,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:07:12,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:07:12,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:07:12,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:07:12,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:07:12,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:07:12,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:07:12,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:07:12,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:07:12,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:07:12,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:07:12,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:07:12,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:07:12,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:07:12,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:07:12,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:07:12,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:07:12,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:07:12,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:07:12,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:07:12,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:07:12,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:07:12,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:07:12,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:07:12,129 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 05:07:12,154 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:07:12,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:07:12,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:07:12,155 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:07:12,156 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:07:12,156 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:07:12,156 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:07:12,156 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:07:12,156 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:07:12,157 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:07:12,157 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:07:12,157 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:07:12,157 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:07:12,157 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:07:12,157 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:07:12,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:07:12,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:07:12,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:07:12,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:07:12,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:07:12,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:07:12,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:07:12,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:07:12,160 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:07:12,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:07:12,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:07:12,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:07:12,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:07:12,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:07:12,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:07:12,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:07:12,161 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:07:12,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:07:12,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:07:12,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:07:12,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:07:12,162 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_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cfba800a850f13ff72fddf9946e31aec208a19aa4b82d402046e12670b66199 [2021-11-03 05:07:12,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:07:12,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:07:12,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:07:12,446 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:07:12,447 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:07:12,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i [2021-11-03 05:07:12,526 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/data/d971925f7/c7c19d8d30374fa4b4e8745ad3f65b8c/FLAG0c4aedb84 [2021-11-03 05:07:13,427 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:07:13,429 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i [2021-11-03 05:07:13,482 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/data/d971925f7/c7c19d8d30374fa4b4e8745ad3f65b8c/FLAG0c4aedb84 [2021-11-03 05:07:13,838 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/data/d971925f7/c7c19d8d30374fa4b4e8745ad3f65b8c [2021-11-03 05:07:13,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:07:13,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:07:13,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:07:13,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:07:13,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:07:13,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:07:13" (1/1) ... [2021-11-03 05:07:13,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59052542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:13, skipping insertion in model container [2021-11-03 05:07:13,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:07:13" (1/1) ... [2021-11-03 05:07:13,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:07:14,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:07:15,338 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:07:15,688 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:07:15,691 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:07:16,074 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_6ea90db9-b1fe-439a-b8b6-d68b77929a31/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i[277952,277965] [2021-11-03 05:07:16,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:07:16,308 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 05:07:16,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@35b88fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:16, skipping insertion in model container [2021-11-03 05:07:16,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:07:16,310 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:07:16,312 INFO L168 Benchmark]: Toolchain (without parser) took 2464.79 ms. Allocated memory was 115.3 MB in the beginning and 155.2 MB in the end (delta: 39.8 MB). Free memory was 86.2 MB in the beginning and 83.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 59.9 MB. Max. memory is 16.1 GB. [2021-11-03 05:07:16,312 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 115.3 MB. Free memory is still 89.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:07:16,313 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2457.93 ms. Allocated memory was 115.3 MB in the beginning and 155.2 MB in the end (delta: 39.8 MB). Free memory was 85.7 MB in the beginning and 83.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 59.9 MB. Max. memory is 16.1 GB. [2021-11-03 05:07:16,315 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 115.3 MB. Free memory is still 89.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2457.93 ms. Allocated memory was 115.3 MB in the beginning and 155.2 MB in the end (delta: 39.8 MB). Free memory was 85.7 MB in the beginning and 83.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 59.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5642]: 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_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1cfba800a850f13ff72fddf9946e31aec208a19aa4b82d402046e12670b66199 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:07:18,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:07:18,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:07:18,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:07:18,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:07:18,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:07:18,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:07:18,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:07:18,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:07:18,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:07:18,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:07:18,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:07:18,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:07:18,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:07:18,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:07:18,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:07:18,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:07:18,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:07:18,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:07:18,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:07:18,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:07:18,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:07:18,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:07:18,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:07:18,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:07:18,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:07:18,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:07:18,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:07:18,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:07:18,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:07:18,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:07:18,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:07:18,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:07:18,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:07:18,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:07:18,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:07:18,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:07:18,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:07:18,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:07:18,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:07:18,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:07:18,638 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 05:07:18,664 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:07:18,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:07:18,665 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:07:18,666 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:07:18,666 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:07:18,666 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:07:18,666 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:07:18,667 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:07:18,667 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:07:18,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:07:18,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:07:18,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:07:18,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:07:18,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:07:18,669 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:07:18,669 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:07:18,669 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:07:18,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:07:18,669 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:07:18,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:07:18,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:07:18,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:07:18,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:07:18,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:07:18,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:07:18,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:07:18,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:07:18,671 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:07:18,672 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:07:18,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:07:18,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:07:18,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:07:18,673 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_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cfba800a850f13ff72fddf9946e31aec208a19aa4b82d402046e12670b66199 [2021-11-03 05:07:19,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:07:19,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:07:19,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:07:19,074 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:07:19,074 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:07:19,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i [2021-11-03 05:07:19,152 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/data/ff3956813/34d3b90a722546898f10118f3b4d8f55/FLAGa7a06d680 [2021-11-03 05:07:20,164 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:07:20,166 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i [2021-11-03 05:07:20,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/data/ff3956813/34d3b90a722546898f10118f3b4d8f55/FLAGa7a06d680 [2021-11-03 05:07:20,600 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/data/ff3956813/34d3b90a722546898f10118f3b4d8f55 [2021-11-03 05:07:20,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:07:20,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:07:20,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:07:20,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:07:20,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:07:20,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:07:20" (1/1) ... [2021-11-03 05:07:20,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b96ddf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:20, skipping insertion in model container [2021-11-03 05:07:20,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:07:20" (1/1) ... [2021-11-03 05:07:20,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:07:20,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:07:22,912 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_6ea90db9-b1fe-439a-b8b6-d68b77929a31/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i[277952,277965] [2021-11-03 05:07:23,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:07:23,212 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:07:23,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:07:23,742 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_6ea90db9-b1fe-439a-b8b6-d68b77929a31/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i[277952,277965] [2021-11-03 05:07:23,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:07:23,801 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:07:24,241 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_6ea90db9-b1fe-439a-b8b6-d68b77929a31/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i[277952,277965] [2021-11-03 05:07:24,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:07:24,380 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:07:24,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:24 WrapperNode [2021-11-03 05:07:24,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:07:24,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:07:24,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:07:24,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:07:24,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:24" (1/1) ... [2021-11-03 05:07:24,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:24" (1/1) ... [2021-11-03 05:07:25,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:07:25,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:07:25,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:07:25,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:07:25,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:24" (1/1) ... [2021-11-03 05:07:25,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:24" (1/1) ... [2021-11-03 05:07:25,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:24" (1/1) ... [2021-11-03 05:07:25,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:24" (1/1) ... [2021-11-03 05:07:25,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:24" (1/1) ... [2021-11-03 05:07:26,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:24" (1/1) ... [2021-11-03 05:07:26,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:24" (1/1) ... [2021-11-03 05:07:26,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:07:26,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:07:26,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:07:26,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:07:26,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:24" (1/1) ... [2021-11-03 05:07:26,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:07:26,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:07:26,351 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:07:26,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:07:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:07:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-03 05:07:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:07:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-03 05:07:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:07:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:07:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-03 05:07:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-03 05:07:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-03 05:07:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:07:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:07:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 05:07:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-03 05:07:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:07:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-03 05:07:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-03 05:07:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:07:26,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:07:26,477 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-03 05:07:26,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:07:26,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:10:10,002 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:10:10,002 INFO L299 CfgBuilder]: Removed 4216 assume(true) statements. [2021-11-03 05:10:10,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:10:10 BoogieIcfgContainer [2021-11-03 05:10:10,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:10:10,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:10:10,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:10:10,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:10:10,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:07:20" (1/3) ... [2021-11-03 05:10:10,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb75939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:10:10, skipping insertion in model container [2021-11-03 05:10:10,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:24" (2/3) ... [2021-11-03 05:10:10,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb75939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:10:10, skipping insertion in model container [2021-11-03 05:10:10,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:10:10" (3/3) ... [2021-11-03 05:10:10,018 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i [2021-11-03 05:10:10,023 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:10:10,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 115 error locations. [2021-11-03 05:10:10,087 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:10:10,093 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:10:10,093 INFO L340 AbstractCegarLoop]: Starting to check reachability of 115 error locations. [2021-11-03 05:10:10,178 INFO L276 IsEmpty]: Start isEmpty. Operand has 5031 states, 4915 states have (on average 1.442319430315361) internal successors, (7089), 5030 states have internal predecessors, (7089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:10:10,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:10,185 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:10:10,186 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:10:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:10,191 INFO L85 PathProgramCache]: Analyzing trace with hash -2040343940, now seen corresponding path program 1 times [2021-11-03 05:10:10,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:10:10,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846433243] [2021-11-03 05:10:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:10,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:10:10,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:10:10,218 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:10:10,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:10:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:14,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:10:14,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:10:15,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:10:15,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:10:15,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846433243] [2021-11-03 05:10:15,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846433243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:15,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:15,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:10:15,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354517276] [2021-11-03 05:10:15,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:10:15,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:10:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:10:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:10:15,481 INFO L87 Difference]: Start difference. First operand has 5031 states, 4915 states have (on average 1.442319430315361) internal successors, (7089), 5030 states have internal predecessors, (7089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:15,716 INFO L93 Difference]: Finished difference Result 10058 states and 14173 transitions. [2021-11-03 05:10:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:10:15,718 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 05:10:15,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:15,766 INFO L225 Difference]: With dead ends: 10058 [2021-11-03 05:10:15,767 INFO L226 Difference]: Without dead ends: 5008 [2021-11-03 05:10:15,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:10:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5008 states. [2021-11-03 05:10:16,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5008 to 5008. [2021-11-03 05:10:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5008 states, 4893 states have (on average 1.3850398528510117) internal successors, (6777), 5007 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5008 states to 5008 states and 6777 transitions. [2021-11-03 05:10:16,041 INFO L78 Accepts]: Start accepts. Automaton has 5008 states and 6777 transitions. Word has length 40 [2021-11-03 05:10:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:16,042 INFO L470 AbstractCegarLoop]: Abstraction has 5008 states and 6777 transitions. [2021-11-03 05:10:16,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:16,043 INFO L276 IsEmpty]: Start isEmpty. Operand 5008 states and 6777 transitions. [2021-11-03 05:10:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:10:16,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:16,045 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:10:16,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:16,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:10:16,264 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:10:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:16,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1380812418, now seen corresponding path program 1 times [2021-11-03 05:10:16,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:10:16,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044805296] [2021-11-03 05:10:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:16,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:10:16,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:10:16,272 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:10:16,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:10:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:20,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:10:20,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:10:21,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:10:21,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:10:21,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044805296] [2021-11-03 05:10:21,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044805296] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:21,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:21,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:10:21,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812760930] [2021-11-03 05:10:21,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:10:21,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:10:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:10:21,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:10:21,345 INFO L87 Difference]: Start difference. First operand 5008 states and 6777 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:23,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:23,827 INFO L93 Difference]: Finished difference Result 10045 states and 13619 transitions. [2021-11-03 05:10:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:10:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 05:10:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:23,859 INFO L225 Difference]: With dead ends: 10045 [2021-11-03 05:10:23,859 INFO L226 Difference]: Without dead ends: 5045 [2021-11-03 05:10:23,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:10:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5045 states. [2021-11-03 05:10:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5045 to 5045. [2021-11-03 05:10:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5045 states, 4930 states have (on average 1.3821501014198783) internal successors, (6814), 5044 states have internal predecessors, (6814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 6814 transitions. [2021-11-03 05:10:24,012 INFO L78 Accepts]: Start accepts. Automaton has 5045 states and 6814 transitions. Word has length 40 [2021-11-03 05:10:24,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:24,013 INFO L470 AbstractCegarLoop]: Abstraction has 5045 states and 6814 transitions. [2021-11-03 05:10:24,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 5045 states and 6814 transitions. [2021-11-03 05:10:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 05:10:24,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:24,022 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] [2021-11-03 05:10:24,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:24,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:10:24,239 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:10:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:24,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1929726503, now seen corresponding path program 1 times [2021-11-03 05:10:24,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:10:24,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387714174] [2021-11-03 05:10:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:24,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:10:24,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:10:24,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:10:24,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:10:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:28,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1363 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:10:28,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:10:29,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:10:30,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:10:30,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387714174] [2021-11-03 05:10:30,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387714174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:10:30,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [160138640] [2021-11-03 05:10:30,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:30,135 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:10:30,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:10:30,137 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:10:30,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-03 05:10:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:32,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1363 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:10:32,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:10:32,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:10:32,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [160138640] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:32,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:10:32,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:10:32,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133733893] [2021-11-03 05:10:32,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:10:32,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:10:32,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:10:32,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:10:32,703 INFO L87 Difference]: Start difference. First operand 5045 states and 6814 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:33,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:33,436 INFO L93 Difference]: Finished difference Result 10108 states and 13655 transitions. [2021-11-03 05:10:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:10:33,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 51 [2021-11-03 05:10:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:33,466 INFO L225 Difference]: With dead ends: 10108 [2021-11-03 05:10:33,466 INFO L226 Difference]: Without dead ends: 5105 [2021-11-03 05:10:33,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:10:33,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5105 states. [2021-11-03 05:10:33,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5105 to 5087. [2021-11-03 05:10:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5087 states, 4972 states have (on average 1.3823411102172165) internal successors, (6873), 5086 states have internal predecessors, (6873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5087 states to 5087 states and 6873 transitions. [2021-11-03 05:10:33,634 INFO L78 Accepts]: Start accepts. Automaton has 5087 states and 6873 transitions. Word has length 51 [2021-11-03 05:10:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:33,636 INFO L470 AbstractCegarLoop]: Abstraction has 5087 states and 6873 transitions. [2021-11-03 05:10:33,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5087 states and 6873 transitions. [2021-11-03 05:10:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 05:10:33,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:33,640 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] [2021-11-03 05:10:33,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:33,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:34,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:10:34,041 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr110ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:10:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:34,041 INFO L85 PathProgramCache]: Analyzing trace with hash -507347168, now seen corresponding path program 1 times [2021-11-03 05:10:34,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:10:34,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083756529] [2021-11-03 05:10:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:34,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:10:34,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:10:34,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:10:34,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:10:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:38,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:10:38,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:10:39,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:10:40,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:10:40,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083756529] [2021-11-03 05:10:40,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083756529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:10:40,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [807873326] [2021-11-03 05:10:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:40,258 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:10:40,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:10:40,266 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:10:40,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-03 05:10:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:42,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:10:42,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:10:42,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:10:43,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [807873326] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:43,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:10:43,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-03 05:10:43,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033795304] [2021-11-03 05:10:43,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:10:43,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:10:43,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:10:43,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:10:43,566 INFO L87 Difference]: Start difference. First operand 5087 states and 6873 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:43,697 INFO L93 Difference]: Finished difference Result 5087 states and 6873 transitions. [2021-11-03 05:10:43,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:10:43,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 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 57 [2021-11-03 05:10:43,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:43,727 INFO L225 Difference]: With dead ends: 5087 [2021-11-03 05:10:43,727 INFO L226 Difference]: Without dead ends: 5085 [2021-11-03 05:10:43,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:10:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5085 states. [2021-11-03 05:10:43,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 5085. [2021-11-03 05:10:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 4971 states have (on average 1.3822168577750955) internal successors, (6871), 5084 states have internal predecessors, (6871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 6871 transitions. [2021-11-03 05:10:43,919 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 6871 transitions. Word has length 57 [2021-11-03 05:10:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:43,921 INFO L470 AbstractCegarLoop]: Abstraction has 5085 states and 6871 transitions. [2021-11-03 05:10:43,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 6871 transitions. [2021-11-03 05:10:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 05:10:43,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:43,923 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] [2021-11-03 05:10:43,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:44,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:44,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:10:44,342 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr111ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:10:44,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:44,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1452129814, now seen corresponding path program 1 times [2021-11-03 05:10:44,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:10:44,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814850768] [2021-11-03 05:10:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:44,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:10:44,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:10:44,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:10:44,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:10:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:48,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 1368 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:10:48,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:10:49,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:10:49,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:10:49,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814850768] [2021-11-03 05:10:49,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814850768] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:10:49,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2009332698] [2021-11-03 05:10:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:49,890 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:10:49,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:10:49,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:10:49,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-03 05:10:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:51,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1368 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:10:51,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:10:52,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:10:53,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2009332698] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:53,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:10:53,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-03 05:10:53,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77401613] [2021-11-03 05:10:53,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:10:53,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:10:53,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:10:53,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:10:53,069 INFO L87 Difference]: Start difference. First operand 5085 states and 6871 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:53,206 INFO L93 Difference]: Finished difference Result 5085 states and 6871 transitions. [2021-11-03 05:10:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:10:53,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 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 58 [2021-11-03 05:10:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:53,236 INFO L225 Difference]: With dead ends: 5085 [2021-11-03 05:10:53,236 INFO L226 Difference]: Without dead ends: 5083 [2021-11-03 05:10:53,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:10:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-11-03 05:10:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 5083. [2021-11-03 05:10:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5083 states, 4970 states have (on average 1.382092555331992) internal successors, (6869), 5082 states have internal predecessors, (6869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5083 states to 5083 states and 6869 transitions. [2021-11-03 05:10:53,432 INFO L78 Accepts]: Start accepts. Automaton has 5083 states and 6869 transitions. Word has length 58 [2021-11-03 05:10:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:53,438 INFO L470 AbstractCegarLoop]: Abstraction has 5083 states and 6869 transitions. [2021-11-03 05:10:53,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 5083 states and 6869 transitions. [2021-11-03 05:10:53,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 05:10:53,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:53,440 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] [2021-11-03 05:10:53,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:53,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:53,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:10:53,854 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr112ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:10:53,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:53,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2066374122, now seen corresponding path program 1 times [2021-11-03 05:10:53,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:10:53,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888141999] [2021-11-03 05:10:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:53,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:10:53,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:10:53,859 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:10:53,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:10:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:58,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:10:58,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:10:58,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:10:59,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:10:59,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888141999] [2021-11-03 05:10:59,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888141999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:10:59,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1017684993] [2021-11-03 05:10:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:59,426 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:10:59,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:10:59,430 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:10:59,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-03 05:11:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:01,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:11:01,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:11:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:02,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:11:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:02,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1017684993] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:02,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:11:02,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-03 05:11:02,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912830747] [2021-11-03 05:11:02,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:11:02,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:11:02,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:11:02,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:11:02,717 INFO L87 Difference]: Start difference. First operand 5083 states and 6869 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:02,924 INFO L93 Difference]: Finished difference Result 5083 states and 6869 transitions. [2021-11-03 05:11:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:11:02,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 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 59 [2021-11-03 05:11:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:02,947 INFO L225 Difference]: With dead ends: 5083 [2021-11-03 05:11:02,948 INFO L226 Difference]: Without dead ends: 5073 [2021-11-03 05:11:02,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:11:02,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5073 states. [2021-11-03 05:11:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5073 to 5073. [2021-11-03 05:11:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5073 states, 4965 states have (on average 1.3814702920443103) internal successors, (6859), 5072 states have internal predecessors, (6859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5073 states to 5073 states and 6859 transitions. [2021-11-03 05:11:03,126 INFO L78 Accepts]: Start accepts. Automaton has 5073 states and 6859 transitions. Word has length 59 [2021-11-03 05:11:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:03,126 INFO L470 AbstractCegarLoop]: Abstraction has 5073 states and 6859 transitions. [2021-11-03 05:11:03,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 5073 states and 6859 transitions. [2021-11-03 05:11:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:11:03,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:03,127 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] [2021-11-03 05:11:03,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:11:03,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:11:03,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:11:03,545 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr113ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:11:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:03,545 INFO L85 PathProgramCache]: Analyzing trace with hash -366888800, now seen corresponding path program 1 times [2021-11-03 05:11:03,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:11:03,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91877149] [2021-11-03 05:11:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:03,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:11:03,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:11:03,548 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:11:03,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:11:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:08,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:11:08,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:11:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:11:08,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:11:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:11:09,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:11:09,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91877149] [2021-11-03 05:11:09,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91877149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:11:09,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [97061980] [2021-11-03 05:11:09,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:09,167 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:11:09,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:11:09,168 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:11:09,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-03 05:11:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:11,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:11:11,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:11:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:12,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:11:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:12,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [97061980] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:12,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:11:12,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-03 05:11:12,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342767491] [2021-11-03 05:11:12,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:11:12,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:11:12,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:11:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:11:12,667 INFO L87 Difference]: Start difference. First operand 5073 states and 6859 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 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) [2021-11-03 05:11:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:14,269 INFO L93 Difference]: Finished difference Result 13098 states and 17806 transitions. [2021-11-03 05:11:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:11:14,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 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 60 [2021-11-03 05:11:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:14,290 INFO L225 Difference]: With dead ends: 13098 [2021-11-03 05:11:14,290 INFO L226 Difference]: Without dead ends: 8067 [2021-11-03 05:11:14,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:11:14,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8067 states. [2021-11-03 05:11:14,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8067 to 8033. [2021-11-03 05:11:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8033 states, 7925 states have (on average 1.3793059936908518) internal successors, (10931), 8032 states have internal predecessors, (10931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8033 states to 8033 states and 10931 transitions. [2021-11-03 05:11:14,556 INFO L78 Accepts]: Start accepts. Automaton has 8033 states and 10931 transitions. Word has length 60 [2021-11-03 05:11:14,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:14,557 INFO L470 AbstractCegarLoop]: Abstraction has 8033 states and 10931 transitions. [2021-11-03 05:11:14,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 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) [2021-11-03 05:11:14,557 INFO L276 IsEmpty]: Start isEmpty. Operand 8033 states and 10931 transitions. [2021-11-03 05:11:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:11:14,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:14,558 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] [2021-11-03 05:11:14,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:11:14,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-03 05:11:14,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:11:14,982 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr114ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:11:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:14,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1511371956, now seen corresponding path program 1 times [2021-11-03 05:11:14,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:11:14,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011732636] [2021-11-03 05:11:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:14,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:11:14,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:11:14,986 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:11:14,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:11:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:19,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1371 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:11:19,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:11:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:11:19,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:11:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:11:20,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:11:20,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011732636] [2021-11-03 05:11:20,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011732636] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:11:20,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [710748093] [2021-11-03 05:11:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:20,683 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:11:20,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:11:20,684 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:11:20,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-03 05:11:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:22,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1371 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:11:22,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:11:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:23,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:11:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:24,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [710748093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:24,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:11:24,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-03 05:11:24,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411650103] [2021-11-03 05:11:24,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:11:24,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:11:24,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:11:24,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:11:24,124 INFO L87 Difference]: Start difference. First operand 8033 states and 10931 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:24,294 INFO L93 Difference]: Finished difference Result 8033 states and 10931 transitions. [2021-11-03 05:11:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:11:24,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 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 61 [2021-11-03 05:11:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:24,314 INFO L225 Difference]: With dead ends: 8033 [2021-11-03 05:11:24,314 INFO L226 Difference]: Without dead ends: 8019 [2021-11-03 05:11:24,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:11:24,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8019 states. [2021-11-03 05:11:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8019 to 8019. [2021-11-03 05:11:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8019 states, 7912 states have (on average 1.3792972699696664) internal successors, (10913), 8018 states have internal predecessors, (10913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:24,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8019 states to 8019 states and 10913 transitions. [2021-11-03 05:11:24,607 INFO L78 Accepts]: Start accepts. Automaton has 8019 states and 10913 transitions. Word has length 61 [2021-11-03 05:11:24,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:24,608 INFO L470 AbstractCegarLoop]: Abstraction has 8019 states and 10913 transitions. [2021-11-03 05:11:24,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand 8019 states and 10913 transitions. [2021-11-03 05:11:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 05:11:24,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:24,609 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:11:24,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:11:24,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:11:25,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:11:25,026 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:11:25,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:25,026 INFO L85 PathProgramCache]: Analyzing trace with hash -691344395, now seen corresponding path program 1 times [2021-11-03 05:11:25,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:11:25,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502620679] [2021-11-03 05:11:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:25,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:11:25,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:11:25,030 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:11:25,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:11:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:29,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:11:29,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:11:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:30,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:11:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:31,182 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:11:31,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502620679] [2021-11-03 05:11:31,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502620679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:11:31,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1033751946] [2021-11-03 05:11:31,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:31,183 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:11:31,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:11:31,184 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:11:31,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 05:11:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:33,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:11:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:11:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:33,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:11:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:34,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1033751946] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:34,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:11:34,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:11:34,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688444379] [2021-11-03 05:11:34,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:11:34,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:11:34,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:11:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:11:34,144 INFO L87 Difference]: Start difference. First operand 8019 states and 10913 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:36,636 INFO L93 Difference]: Finished difference Result 16006 states and 21787 transitions. [2021-11-03 05:11:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:11:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 05:11:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:36,654 INFO L225 Difference]: With dead ends: 16006 [2021-11-03 05:11:36,655 INFO L226 Difference]: Without dead ends: 8027 [2021-11-03 05:11:36,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:11:36,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-11-03 05:11:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 8020. [2021-11-03 05:11:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8020 states, 7913 states have (on average 1.3789965878933401) internal successors, (10912), 8019 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8020 states to 8020 states and 10912 transitions. [2021-11-03 05:11:36,939 INFO L78 Accepts]: Start accepts. Automaton has 8020 states and 10912 transitions. Word has length 83 [2021-11-03 05:11:36,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:36,939 INFO L470 AbstractCegarLoop]: Abstraction has 8020 states and 10912 transitions. [2021-11-03 05:11:36,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:36,940 INFO L276 IsEmpty]: Start isEmpty. Operand 8020 states and 10912 transitions. [2021-11-03 05:11:36,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:11:36,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:36,947 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:11:36,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:11:37,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 05:11:37,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:11:37,364 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:11:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:37,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1004596261, now seen corresponding path program 1 times [2021-11-03 05:11:37,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:11:37,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337497759] [2021-11-03 05:11:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:37,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:11:37,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:11:37,367 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:11:37,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:11:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:42,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:11:42,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:11:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:42,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:11:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:43,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:11:43,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337497759] [2021-11-03 05:11:43,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337497759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:11:43,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2087981504] [2021-11-03 05:11:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:43,541 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:11:43,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:11:43,542 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:11:43,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-03 05:11:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:45,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:11:45,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:11:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-03 05:11:46,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:11:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-03 05:11:46,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2087981504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:46,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:11:46,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:11:46,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151983646] [2021-11-03 05:11:46,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:11:46,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:11:46,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:11:46,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:11:46,336 INFO L87 Difference]: Start difference. First operand 8020 states and 10912 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:48,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:48,788 INFO L93 Difference]: Finished difference Result 8020 states and 10912 transitions. [2021-11-03 05:11:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:11:48,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:11:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:48,801 INFO L225 Difference]: With dead ends: 8020 [2021-11-03 05:11:48,802 INFO L226 Difference]: Without dead ends: 8012 [2021-11-03 05:11:48,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:11:48,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-11-03 05:11:49,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 8012. [2021-11-03 05:11:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8012 states, 7909 states have (on average 1.3781767606524213) internal successors, (10900), 8011 states have internal predecessors, (10900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8012 states to 8012 states and 10900 transitions. [2021-11-03 05:11:49,282 INFO L78 Accepts]: Start accepts. Automaton has 8012 states and 10900 transitions. Word has length 85 [2021-11-03 05:11:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:49,282 INFO L470 AbstractCegarLoop]: Abstraction has 8012 states and 10900 transitions. [2021-11-03 05:11:49,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 8012 states and 10900 transitions. [2021-11-03 05:11:49,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-03 05:11:49,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:49,285 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:11:49,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:11:49,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:11:49,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:11:49,702 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:11:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:49,703 INFO L85 PathProgramCache]: Analyzing trace with hash -96796412, now seen corresponding path program 1 times [2021-11-03 05:11:49,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:11:49,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897947312] [2021-11-03 05:11:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:49,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:11:49,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:11:49,708 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:11:49,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:11:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:54,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:11:54,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:11:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:55,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:11:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:11:56,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:11:56,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897947312] [2021-11-03 05:11:56,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897947312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:11:56,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1237826145] [2021-11-03 05:11:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:56,573 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:11:56,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:11:56,575 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:11:56,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 05:11:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:59,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:11:59,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:11:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-03 05:11:59,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:11:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-03 05:11:59,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1237826145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:59,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:11:59,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:11:59,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979543526] [2021-11-03 05:11:59,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:11:59,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:11:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:11:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:11:59,816 INFO L87 Difference]: Start difference. First operand 8012 states and 10900 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:00,063 INFO L93 Difference]: Finished difference Result 15986 states and 21758 transitions. [2021-11-03 05:12:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:12:00,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 120 [2021-11-03 05:12:00,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:00,076 INFO L225 Difference]: With dead ends: 15986 [2021-11-03 05:12:00,076 INFO L226 Difference]: Without dead ends: 8016 [2021-11-03 05:12:00,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:12:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2021-11-03 05:12:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 8016. [2021-11-03 05:12:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 7913 states have (on average 1.3779855933274359) internal successors, (10904), 8015 states have internal predecessors, (10904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 10904 transitions. [2021-11-03 05:12:00,389 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 10904 transitions. Word has length 120 [2021-11-03 05:12:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:00,390 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 10904 transitions. [2021-11-03 05:12:00,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 10904 transitions. [2021-11-03 05:12:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-03 05:12:00,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:00,393 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:00,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:12:00,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:12:00,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:12:00,806 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:12:00,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash -74164158, now seen corresponding path program 1 times [2021-11-03 05:12:00,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:12:00,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286731184] [2021-11-03 05:12:00,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:00,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:12:00,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:12:00,812 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:12:00,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:12:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:06,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:12:06,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:12:06,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:12:08,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:12:08,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286731184] [2021-11-03 05:12:08,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286731184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:12:08,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [96917366] [2021-11-03 05:12:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:08,004 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:12:08,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:12:08,010 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:12:08,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 05:12:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:10,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:12:10,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:12:11,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:12:12,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [96917366] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:12,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:12:12,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-03 05:12:12,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693726183] [2021-11-03 05:12:12,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:12:12,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:12:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:12:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:12:12,009 INFO L87 Difference]: Start difference. First operand 8016 states and 10904 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:14,914 INFO L93 Difference]: Finished difference Result 16183 states and 22060 transitions. [2021-11-03 05:12:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:12:14,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 120 [2021-11-03 05:12:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:14,927 INFO L225 Difference]: With dead ends: 16183 [2021-11-03 05:12:14,927 INFO L226 Difference]: Without dead ends: 8209 [2021-11-03 05:12:14,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:12:14,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8209 states. [2021-11-03 05:12:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8209 to 8192. [2021-11-03 05:12:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8192 states, 8089 states have (on average 1.3801458771170725) internal successors, (11164), 8191 states have internal predecessors, (11164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8192 states to 8192 states and 11164 transitions. [2021-11-03 05:12:15,199 INFO L78 Accepts]: Start accepts. Automaton has 8192 states and 11164 transitions. Word has length 120 [2021-11-03 05:12:15,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:15,200 INFO L470 AbstractCegarLoop]: Abstraction has 8192 states and 11164 transitions. [2021-11-03 05:12:15,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:15,200 INFO L276 IsEmpty]: Start isEmpty. Operand 8192 states and 11164 transitions. [2021-11-03 05:12:15,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-03 05:12:15,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:15,203 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:15,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:12:15,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:12:15,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:12:15,618 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:12:15,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:15,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1986467979, now seen corresponding path program 1 times [2021-11-03 05:12:15,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:12:15,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033920482] [2021-11-03 05:12:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:15,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:12:15,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:12:15,622 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:12:15,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 05:12:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:20,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:12:20,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:12:21,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:12:22,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:12:22,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033920482] [2021-11-03 05:12:22,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033920482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:12:22,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1101635707] [2021-11-03 05:12:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:22,730 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:12:22,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:12:22,731 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:12:22,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-03 05:12:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:25,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:12:25,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:12:26,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:12:26,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1101635707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:26,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:12:26,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-03 05:12:26,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916114530] [2021-11-03 05:12:26,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:12:26,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:12:26,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:12:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:12:26,917 INFO L87 Difference]: Start difference. First operand 8192 states and 11164 transitions. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:34,056 INFO L93 Difference]: Finished difference Result 30843 states and 41972 transitions. [2021-11-03 05:12:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 05:12:34,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-03 05:12:34,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:34,086 INFO L225 Difference]: With dead ends: 30843 [2021-11-03 05:12:34,087 INFO L226 Difference]: Without dead ends: 22693 [2021-11-03 05:12:34,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-03 05:12:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22693 states. [2021-11-03 05:12:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22693 to 8204. [2021-11-03 05:12:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8204 states, 8101 states have (on average 1.3795827675595604) internal successors, (11176), 8203 states have internal predecessors, (11176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 11176 transitions. [2021-11-03 05:12:34,735 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 11176 transitions. Word has length 133 [2021-11-03 05:12:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:34,735 INFO L470 AbstractCegarLoop]: Abstraction has 8204 states and 11176 transitions. [2021-11-03 05:12:34,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 11176 transitions. [2021-11-03 05:12:34,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 05:12:34,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:34,746 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:34,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:12:34,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:12:35,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:12:35,163 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:12:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:35,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2067518463, now seen corresponding path program 1 times [2021-11-03 05:12:35,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:12:35,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396528021] [2021-11-03 05:12:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:35,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:12:35,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:12:35,167 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:12:35,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 05:12:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:40,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:12:40,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:12:41,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:12:42,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:12:42,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396528021] [2021-11-03 05:12:42,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396528021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:12:42,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1673840427] [2021-11-03 05:12:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:42,435 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:12:42,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:12:42,454 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:12:42,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-03 05:12:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:45,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:12:45,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:12:46,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:12:46,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1673840427] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:46,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:12:46,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-03 05:12:46,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022471107] [2021-11-03 05:12:46,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:12:46,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:12:46,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:12:46,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:12:46,676 INFO L87 Difference]: Start difference. First operand 8204 states and 11176 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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) [2021-11-03 05:12:49,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:49,886 INFO L93 Difference]: Finished difference Result 36596 states and 49852 transitions. [2021-11-03 05:12:49,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 05:12:49,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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 134 [2021-11-03 05:12:49,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:49,919 INFO L225 Difference]: With dead ends: 36596 [2021-11-03 05:12:49,919 INFO L226 Difference]: Without dead ends: 28434 [2021-11-03 05:12:49,930 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-03 05:12:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28434 states. [2021-11-03 05:12:50,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28434 to 8216. [2021-11-03 05:12:50,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8216 states, 8113 states have (on average 1.3790213238013065) internal successors, (11188), 8215 states have internal predecessors, (11188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8216 states to 8216 states and 11188 transitions. [2021-11-03 05:12:50,475 INFO L78 Accepts]: Start accepts. Automaton has 8216 states and 11188 transitions. Word has length 134 [2021-11-03 05:12:50,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:50,475 INFO L470 AbstractCegarLoop]: Abstraction has 8216 states and 11188 transitions. [2021-11-03 05:12:50,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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) [2021-11-03 05:12:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 8216 states and 11188 transitions. [2021-11-03 05:12:50,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 05:12:50,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:50,478 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:50,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-03 05:12:50,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-03 05:12:50,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:12:50,894 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:12:50,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1969283395, now seen corresponding path program 1 times [2021-11-03 05:12:50,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:12:50,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840698329] [2021-11-03 05:12:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:50,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:12:50,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:12:50,898 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:12:50,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 05:12:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:56,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:12:56,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:12:57,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:12:58,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:12:58,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840698329] [2021-11-03 05:12:58,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840698329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:12:58,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1789593163] [2021-11-03 05:12:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:58,247 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:12:58,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:12:58,260 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:12:58,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-03 05:13:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:01,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:13:01,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:13:02,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:13:02,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1789593163] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:02,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:13:02,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-03 05:13:02,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404096945] [2021-11-03 05:13:02,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:13:02,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:02,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:13:02,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:13:02,353 INFO L87 Difference]: Start difference. First operand 8216 states and 11188 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:03,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:03,875 INFO L93 Difference]: Finished difference Result 29502 states and 40159 transitions. [2021-11-03 05:13:03,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:13:03,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-03 05:13:03,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:03,902 INFO L225 Difference]: With dead ends: 29502 [2021-11-03 05:13:03,902 INFO L226 Difference]: Without dead ends: 21328 [2021-11-03 05:13:03,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:13:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21328 states. [2021-11-03 05:13:04,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21328 to 8216. [2021-11-03 05:13:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8216 states, 8113 states have (on average 1.378528287932947) internal successors, (11184), 8215 states have internal predecessors, (11184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8216 states to 8216 states and 11184 transitions. [2021-11-03 05:13:04,515 INFO L78 Accepts]: Start accepts. Automaton has 8216 states and 11184 transitions. Word has length 134 [2021-11-03 05:13:04,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:04,516 INFO L470 AbstractCegarLoop]: Abstraction has 8216 states and 11184 transitions. [2021-11-03 05:13:04,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:04,516 INFO L276 IsEmpty]: Start isEmpty. Operand 8216 states and 11184 transitions. [2021-11-03 05:13:04,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 05:13:04,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:04,519 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:04,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:04,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-03 05:13:04,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:13:04,922 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:13:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1045820223, now seen corresponding path program 1 times [2021-11-03 05:13:04,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:04,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017873678] [2021-11-03 05:13:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:04,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:04,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:04,926 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:04,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 05:13:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:10,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:13:10,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:13:11,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:13:12,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:12,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017873678] [2021-11-03 05:13:12,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017873678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:13:12,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [904937817] [2021-11-03 05:13:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:12,532 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:13:12,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:13:12,534 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:13:12,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 05:13:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:15,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:13:15,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:13:16,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:13:16,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [904937817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:16,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:13:16,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:13:16,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920990193] [2021-11-03 05:13:16,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:16,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:16,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:13:16,608 INFO L87 Difference]: Start difference. First operand 8216 states and 11184 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:20,493 INFO L93 Difference]: Finished difference Result 16282 states and 22264 transitions. [2021-11-03 05:13:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:20,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-03 05:13:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:20,502 INFO L225 Difference]: With dead ends: 16282 [2021-11-03 05:13:20,502 INFO L226 Difference]: Without dead ends: 8108 [2021-11-03 05:13:20,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:13:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8108 states. [2021-11-03 05:13:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8108 to 8108. [2021-11-03 05:13:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8108 states, 8059 states have (on average 1.368407991065889) internal successors, (11028), 8107 states have internal predecessors, (11028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8108 states to 8108 states and 11028 transitions. [2021-11-03 05:13:20,923 INFO L78 Accepts]: Start accepts. Automaton has 8108 states and 11028 transitions. Word has length 134 [2021-11-03 05:13:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:20,923 INFO L470 AbstractCegarLoop]: Abstraction has 8108 states and 11028 transitions. [2021-11-03 05:13:20,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 8108 states and 11028 transitions. [2021-11-03 05:13:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 05:13:20,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:20,927 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:20,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:21,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:21,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:13:21,350 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:13:21,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:21,350 INFO L85 PathProgramCache]: Analyzing trace with hash -11751649, now seen corresponding path program 1 times [2021-11-03 05:13:21,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:21,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961131703] [2021-11-03 05:13:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:21,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:21,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:21,354 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:21,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-03 05:13:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:26,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:13:26,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:13:27,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:13:29,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:29,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961131703] [2021-11-03 05:13:29,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961131703] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:13:29,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1314925809] [2021-11-03 05:13:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:29,038 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:13:29,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:13:29,039 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:13:29,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-03 05:13:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:32,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:13:32,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:13:32,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:13:33,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1314925809] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:33,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:13:33,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-03 05:13:33,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577584104] [2021-11-03 05:13:33,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:13:33,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:33,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:13:33,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:13:33,500 INFO L87 Difference]: Start difference. First operand 8108 states and 11028 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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) [2021-11-03 05:13:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:35,301 INFO L93 Difference]: Finished difference Result 24128 states and 32752 transitions. [2021-11-03 05:13:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:13:35,302 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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 134 [2021-11-03 05:13:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:35,320 INFO L225 Difference]: With dead ends: 24128 [2021-11-03 05:13:35,320 INFO L226 Difference]: Without dead ends: 16062 [2021-11-03 05:13:35,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:13:35,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16062 states. [2021-11-03 05:13:35,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16062 to 5764. [2021-11-03 05:13:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5764 states, 5721 states have (on average 1.3633980073413738) internal successors, (7800), 5763 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5764 states to 5764 states and 7800 transitions. [2021-11-03 05:13:35,764 INFO L78 Accepts]: Start accepts. Automaton has 5764 states and 7800 transitions. Word has length 134 [2021-11-03 05:13:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:35,765 INFO L470 AbstractCegarLoop]: Abstraction has 5764 states and 7800 transitions. [2021-11-03 05:13:35,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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) [2021-11-03 05:13:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 5764 states and 7800 transitions. [2021-11-03 05:13:35,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-03 05:13:35,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:35,767 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:35,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:36,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:36,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:36,168 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:13:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash -405662120, now seen corresponding path program 1 times [2021-11-03 05:13:36,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:36,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93934905] [2021-11-03 05:13:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:36,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:36,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:36,173 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:36,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-03 05:13:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:42,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:13:42,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:13:43,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:13:44,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:44,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93934905] [2021-11-03 05:13:44,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93934905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:13:44,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1172862233] [2021-11-03 05:13:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:44,414 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:13:44,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:13:44,414 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:13:44,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-03 05:13:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:48,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:13:48,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:13:48,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:13:49,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1172862233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:49,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:13:49,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5, 5] total 10 [2021-11-03 05:13:49,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701834221] [2021-11-03 05:13:49,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:13:49,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:49,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:13:49,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:13:49,265 INFO L87 Difference]: Start difference. First operand 5764 states and 7800 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:50,237 INFO L93 Difference]: Finished difference Result 13765 states and 18644 transitions. [2021-11-03 05:13:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:50,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 144 [2021-11-03 05:13:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:50,249 INFO L225 Difference]: With dead ends: 13765 [2021-11-03 05:13:50,249 INFO L226 Difference]: Without dead ends: 8043 [2021-11-03 05:13:50,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:13:50,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8043 states. [2021-11-03 05:13:50,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8043 to 5802. [2021-11-03 05:13:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5802 states, 5759 states have (on average 1.3606528911269318) internal successors, (7836), 5801 states have internal predecessors, (7836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5802 states to 5802 states and 7836 transitions. [2021-11-03 05:13:50,749 INFO L78 Accepts]: Start accepts. Automaton has 5802 states and 7836 transitions. Word has length 144 [2021-11-03 05:13:50,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:50,749 INFO L470 AbstractCegarLoop]: Abstraction has 5802 states and 7836 transitions. [2021-11-03 05:13:50,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 5802 states and 7836 transitions. [2021-11-03 05:13:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-03 05:13:50,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:50,753 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:50,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:51,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:51,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:51,166 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:13:51,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:51,167 INFO L85 PathProgramCache]: Analyzing trace with hash 235098984, now seen corresponding path program 1 times [2021-11-03 05:13:51,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:51,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914048968] [2021-11-03 05:13:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:51,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:51,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:51,170 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:51,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-03 05:13:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:57,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:13:57,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:13:58,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:13:59,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:59,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914048968] [2021-11-03 05:13:59,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914048968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:13:59,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1471242324] [2021-11-03 05:13:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:59,386 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:13:59,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:13:59,387 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:13:59,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-03 05:14:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:03,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:14:03,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:14:03,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:14:03,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1471242324] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:14:03,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:14:03,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:14:03,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873335817] [2021-11-03 05:14:03,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:14:03,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:14:03,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:14:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:14:03,957 INFO L87 Difference]: Start difference. First operand 5802 states and 7836 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:04,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:14:04,404 INFO L93 Difference]: Finished difference Result 11564 states and 15626 transitions. [2021-11-03 05:14:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:14:04,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-03 05:14:04,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:14:04,410 INFO L225 Difference]: With dead ends: 11564 [2021-11-03 05:14:04,411 INFO L226 Difference]: Without dead ends: 5804 [2021-11-03 05:14:04,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:14:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2021-11-03 05:14:04,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 5804. [2021-11-03 05:14:04,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5804 states, 5761 states have (on average 1.3605276861655962) internal successors, (7838), 5803 states have internal predecessors, (7838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5804 states to 5804 states and 7838 transitions. [2021-11-03 05:14:04,911 INFO L78 Accepts]: Start accepts. Automaton has 5804 states and 7838 transitions. Word has length 144 [2021-11-03 05:14:04,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:14:04,912 INFO L470 AbstractCegarLoop]: Abstraction has 5804 states and 7838 transitions. [2021-11-03 05:14:04,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:04,912 INFO L276 IsEmpty]: Start isEmpty. Operand 5804 states and 7838 transitions. [2021-11-03 05:14:04,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-03 05:14:04,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:04,915 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:14:04,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-03 05:14:05,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-11-03 05:14:05,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:14:05,330 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:14:05,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:05,331 INFO L85 PathProgramCache]: Analyzing trace with hash 453953702, now seen corresponding path program 1 times [2021-11-03 05:14:05,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:14:05,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549021501] [2021-11-03 05:14:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:05,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:14:05,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:14:05,335 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:14:05,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-03 05:14:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:11,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:14:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:14:12,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:14:13,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:14:13,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549021501] [2021-11-03 05:14:13,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549021501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:14:13,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1008570674] [2021-11-03 05:14:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:13,670 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:14:13,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:14:13,671 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:14:13,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-03 05:14:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:17,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:14:17,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:14:18,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:14:18,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1008570674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:14:18,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:14:18,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-03 05:14:18,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361227629] [2021-11-03 05:14:18,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:14:18,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:14:18,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:14:18,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:14:18,956 INFO L87 Difference]: Start difference. First operand 5804 states and 7838 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:14:31,793 INFO L93 Difference]: Finished difference Result 31375 states and 42288 transitions. [2021-11-03 05:14:31,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:14:31,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-03 05:14:31,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:14:31,826 INFO L225 Difference]: With dead ends: 31375 [2021-11-03 05:14:31,826 INFO L226 Difference]: Without dead ends: 25613 [2021-11-03 05:14:31,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:14:31,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25613 states. [2021-11-03 05:14:32,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25613 to 5810. [2021-11-03 05:14:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5810 states, 5767 states have (on average 1.3601525923357032) internal successors, (7844), 5809 states have internal predecessors, (7844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5810 states to 5810 states and 7844 transitions. [2021-11-03 05:14:32,378 INFO L78 Accepts]: Start accepts. Automaton has 5810 states and 7844 transitions. Word has length 144 [2021-11-03 05:14:32,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:14:32,378 INFO L470 AbstractCegarLoop]: Abstraction has 5810 states and 7844 transitions. [2021-11-03 05:14:32,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 5810 states and 7844 transitions. [2021-11-03 05:14:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-03 05:14:32,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:32,381 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:14:32,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-03 05:14:32,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-03 05:14:32,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:14:32,794 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:14:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:32,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1900584387, now seen corresponding path program 1 times [2021-11-03 05:14:32,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:14:32,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765895113] [2021-11-03 05:14:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:32,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:14:32,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:14:32,798 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:14:32,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-03 05:14:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:39,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:14:39,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:14:40,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:14:41,277 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:14:41,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765895113] [2021-11-03 05:14:41,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765895113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:14:41,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [734627520] [2021-11-03 05:14:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:41,277 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:14:41,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:14:41,278 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:14:41,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-03 05:14:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:45,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:14:45,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:14:45,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:14:46,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [734627520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:14:46,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:14:46,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-03 05:14:46,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736825972] [2021-11-03 05:14:46,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:14:46,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:14:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:14:46,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:14:46,501 INFO L87 Difference]: Start difference. First operand 5810 states and 7844 transitions. Second operand has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:51,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:14:51,271 INFO L93 Difference]: Finished difference Result 35139 states and 47313 transitions. [2021-11-03 05:14:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 05:14:51,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 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 145 [2021-11-03 05:14:51,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:14:51,308 INFO L225 Difference]: With dead ends: 35139 [2021-11-03 05:14:51,308 INFO L226 Difference]: Without dead ends: 29371 [2021-11-03 05:14:51,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-03 05:14:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29371 states. [2021-11-03 05:14:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29371 to 5603. [2021-11-03 05:14:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5603 states, 5563 states have (on average 1.358080172568758) internal successors, (7555), 5602 states have internal predecessors, (7555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 7555 transitions. [2021-11-03 05:14:51,933 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 7555 transitions. Word has length 145 [2021-11-03 05:14:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:14:51,933 INFO L470 AbstractCegarLoop]: Abstraction has 5603 states and 7555 transitions. [2021-11-03 05:14:51,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 7555 transitions. [2021-11-03 05:14:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-03 05:14:51,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:51,936 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:14:51,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-03 05:14:52,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-03 05:14:52,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:14:52,350 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:14:52,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:52,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1414981502, now seen corresponding path program 1 times [2021-11-03 05:14:52,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:14:52,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086339849] [2021-11-03 05:14:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:52,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:14:52,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:14:52,355 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:14:52,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-03 05:14:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:58,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1696 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:14:58,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:14:59,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:15:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:15:00,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:15:00,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086339849] [2021-11-03 05:15:00,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086339849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:15:00,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1681743768] [2021-11-03 05:15:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:15:00,684 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:15:00,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:15:00,684 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:15:00,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-03 05:15:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:15:04,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1696 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:15:04,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:15:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:15:05,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:15:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:15:05,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1681743768] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:15:05,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:15:05,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:15:05,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220300852] [2021-11-03 05:15:05,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:15:05,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:15:05,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:15:05,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:15:05,627 INFO L87 Difference]: Start difference. First operand 5603 states and 7555 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 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) [2021-11-03 05:15:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:15:06,247 INFO L93 Difference]: Finished difference Result 11166 states and 15064 transitions. [2021-11-03 05:15:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:15:06,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 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 145 [2021-11-03 05:15:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:15:06,255 INFO L225 Difference]: With dead ends: 11166 [2021-11-03 05:15:06,255 INFO L226 Difference]: Without dead ends: 5605 [2021-11-03 05:15:06,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:15:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2021-11-03 05:15:06,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5605. [2021-11-03 05:15:06,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5605 states, 5565 states have (on average 1.3579514824797845) internal successors, (7557), 5604 states have internal predecessors, (7557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:15:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 7557 transitions. [2021-11-03 05:15:06,817 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 7557 transitions. Word has length 145 [2021-11-03 05:15:06,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:15:06,817 INFO L470 AbstractCegarLoop]: Abstraction has 5605 states and 7557 transitions. [2021-11-03 05:15:06,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 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) [2021-11-03 05:15:06,817 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 7557 transitions. [2021-11-03 05:15:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-03 05:15:06,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:15:06,820 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:15:06,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-03 05:15:07,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-03 05:15:07,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:15:07,234 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:15:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:15:07,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1633836220, now seen corresponding path program 1 times [2021-11-03 05:15:07,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:15:07,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166261061] [2021-11-03 05:15:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:15:07,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:15:07,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:15:07,238 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:15:07,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-03 05:15:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:15:13,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 1699 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:15:13,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:15:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:15:14,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:15:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:15:15,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:15:15,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166261061] [2021-11-03 05:15:15,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166261061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:15:15,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [467995859] [2021-11-03 05:15:15,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:15:15,679 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:15:15,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:15:15,679 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:15:15,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-03 05:15:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:15:20,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1699 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:15:20,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:15:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:15:20,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:15:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:15:21,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [467995859] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:15:21,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:15:21,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-03 05:15:21,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597723399] [2021-11-03 05:15:21,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:15:21,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:15:21,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:15:21,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:15:21,300 INFO L87 Difference]: Start difference. First operand 5605 states and 7557 transitions. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:15:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:15:34,833 INFO L93 Difference]: Finished difference Result 29482 states and 39730 transitions. [2021-11-03 05:15:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 05:15:34,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 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 145 [2021-11-03 05:15:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:15:34,860 INFO L225 Difference]: With dead ends: 29482 [2021-11-03 05:15:34,860 INFO L226 Difference]: Without dead ends: 23919 [2021-11-03 05:15:34,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-03 05:15:34,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23919 states. [2021-11-03 05:15:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23919 to 5611. [2021-11-03 05:15:35,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5611 states, 5571 states have (on average 1.3575659666128164) internal successors, (7563), 5610 states have internal predecessors, (7563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:15:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5611 states to 5611 states and 7563 transitions. [2021-11-03 05:15:35,692 INFO L78 Accepts]: Start accepts. Automaton has 5611 states and 7563 transitions. Word has length 145 [2021-11-03 05:15:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:15:35,692 INFO L470 AbstractCegarLoop]: Abstraction has 5611 states and 7563 transitions. [2021-11-03 05:15:35,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:15:35,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5611 states and 7563 transitions. [2021-11-03 05:15:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-03 05:15:35,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:15:35,694 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:15:35,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-03 05:15:35,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2021-11-03 05:15:36,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:15:36,098 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:15:36,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:15:36,099 INFO L85 PathProgramCache]: Analyzing trace with hash -142190953, now seen corresponding path program 1 times [2021-11-03 05:15:36,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:15:36,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359767774] [2021-11-03 05:15:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:15:36,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:15:36,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:15:36,102 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:15:36,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-03 05:15:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:15:42,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1710 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:15:42,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:15:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:15:43,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:15:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 05:15:44,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:15:44,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359767774] [2021-11-03 05:15:44,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359767774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:15:44,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [890742336] [2021-11-03 05:15:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:15:44,634 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:15:44,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:15:44,635 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:15:44,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-03 05:15:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:15:49,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1710 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:15:49,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:15:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:15:49,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:15:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:15:50,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [890742336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:15:50,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:15:50,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-03 05:15:50,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187034581] [2021-11-03 05:15:50,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:15:50,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:15:50,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:15:50,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:15:50,217 INFO L87 Difference]: Start difference. First operand 5611 states and 7563 transitions. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:15:55,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:15:55,234 INFO L93 Difference]: Finished difference Result 30982 states and 41714 transitions. [2021-11-03 05:15:55,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 05:15:55,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-03 05:15:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:15:55,261 INFO L225 Difference]: With dead ends: 30982 [2021-11-03 05:15:55,261 INFO L226 Difference]: Without dead ends: 25413 [2021-11-03 05:15:55,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-03 05:15:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25413 states. [2021-11-03 05:15:56,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25413 to 5124. [2021-11-03 05:15:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 5085 states have (on average 1.3569321533923304) internal successors, (6900), 5123 states have internal predecessors, (6900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:15:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 6900 transitions. [2021-11-03 05:15:56,072 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 6900 transitions. Word has length 146 [2021-11-03 05:15:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:15:56,072 INFO L470 AbstractCegarLoop]: Abstraction has 5124 states and 6900 transitions. [2021-11-03 05:15:56,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:15:56,072 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 6900 transitions. [2021-11-03 05:15:56,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-03 05:15:56,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:15:56,075 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:15:56,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-03 05:15:56,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-11-03 05:15:56,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:15:56,476 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr113ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:15:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:15:56,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2113427720, now seen corresponding path program 1 times [2021-11-03 05:15:56,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:15:56,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837997713] [2021-11-03 05:15:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:15:56,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:15:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:15:56,480 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:15:56,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-03 05:16:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:02,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:16:03,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-03 05:16:03,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-03 05:16:05,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:05,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837997713] [2021-11-03 05:16:05,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837997713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:16:05,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1395627508] [2021-11-03 05:16:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:05,176 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:16:05,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:16:05,195 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:16:05,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-03 05:16:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:09,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:16:09,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:16:10,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:16:11,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1395627508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:11,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:16:11,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-03 05:16:11,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135263148] [2021-11-03 05:16:11,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:16:11,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:16:11,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:16:11,106 INFO L87 Difference]: Start difference. First operand 5124 states and 6900 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:13,716 INFO L93 Difference]: Finished difference Result 16046 states and 21647 transitions. [2021-11-03 05:16:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:16:13,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-03 05:16:13,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:13,731 INFO L225 Difference]: With dead ends: 16046 [2021-11-03 05:16:13,732 INFO L226 Difference]: Without dead ends: 15084 [2021-11-03 05:16:13,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:16:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15084 states. [2021-11-03 05:16:14,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15084 to 5124. [2021-11-03 05:16:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 5085 states have (on average 1.3561455260570305) internal successors, (6896), 5123 states have internal predecessors, (6896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 6896 transitions. [2021-11-03 05:16:14,427 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 6896 transitions. Word has length 150 [2021-11-03 05:16:14,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:14,428 INFO L470 AbstractCegarLoop]: Abstraction has 5124 states and 6896 transitions. [2021-11-03 05:16:14,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:14,428 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 6896 transitions. [2021-11-03 05:16:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-03 05:16:14,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:14,430 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:14,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-03 05:16:14,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-03 05:16:14,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:16:14,831 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr113ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:16:14,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:14,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1672066486, now seen corresponding path program 1 times [2021-11-03 05:16:14,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:14,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13723057] [2021-11-03 05:16:14,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:14,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:14,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:14,834 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:14,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-03 05:16:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:21,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:16:21,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-03 05:16:22,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-03 05:16:23,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:23,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13723057] [2021-11-03 05:16:23,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13723057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:16:23,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [118723654] [2021-11-03 05:16:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:23,644 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:16:23,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:16:23,645 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:16:23,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-03 05:16:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:28,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:16:28,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:16:29,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:16:29,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [118723654] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:29,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:16:29,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-03 05:16:29,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613787805] [2021-11-03 05:16:29,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:16:29,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:16:29,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:16:29,814 INFO L87 Difference]: Start difference. First operand 5124 states and 6896 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:31,455 INFO L93 Difference]: Finished difference Result 7888 states and 10588 transitions. [2021-11-03 05:16:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:16:31,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 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 150 [2021-11-03 05:16:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:31,464 INFO L225 Difference]: With dead ends: 7888 [2021-11-03 05:16:31,464 INFO L226 Difference]: Without dead ends: 6938 [2021-11-03 05:16:31,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:16:31,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6938 states. [2021-11-03 05:16:32,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6938 to 5124. [2021-11-03 05:16:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 5085 states have (on average 1.3557522123893806) internal successors, (6894), 5123 states have internal predecessors, (6894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:32,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 6894 transitions. [2021-11-03 05:16:32,227 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 6894 transitions. Word has length 150 [2021-11-03 05:16:32,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:32,227 INFO L470 AbstractCegarLoop]: Abstraction has 5124 states and 6894 transitions. [2021-11-03 05:16:32,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:32,228 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 6894 transitions. [2021-11-03 05:16:32,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-03 05:16:32,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:32,230 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:32,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-03 05:16:32,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2021-11-03 05:16:32,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:16:32,631 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr113ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:16:32,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:32,631 INFO L85 PathProgramCache]: Analyzing trace with hash 385421910, now seen corresponding path program 1 times [2021-11-03 05:16:32,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:32,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664855234] [2021-11-03 05:16:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:32,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:32,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:32,634 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:32,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-03 05:16:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:39,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:16:39,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-03 05:16:40,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-03 05:16:41,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:41,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664855234] [2021-11-03 05:16:41,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664855234] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:16:41,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [938099414] [2021-11-03 05:16:41,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:41,552 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:16:41,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:16:41,553 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:16:41,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-03 05:16:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:46,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:16:46,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:16:47,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:16:47,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [938099414] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:47,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:16:47,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-03 05:16:47,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581473766] [2021-11-03 05:16:47,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:16:47,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:47,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:16:47,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:16:47,537 INFO L87 Difference]: Start difference. First operand 5124 states and 6894 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:50,270 INFO L93 Difference]: Finished difference Result 16022 states and 21609 transitions. [2021-11-03 05:16:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:16:50,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 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 150 [2021-11-03 05:16:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:50,286 INFO L225 Difference]: With dead ends: 16022 [2021-11-03 05:16:50,286 INFO L226 Difference]: Without dead ends: 15060 [2021-11-03 05:16:50,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:16:50,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15060 states. [2021-11-03 05:16:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15060 to 5112. [2021-11-03 05:16:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5112 states, 5073 states have (on average 1.3558052434456929) internal successors, (6878), 5111 states have internal predecessors, (6878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:51,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5112 states to 5112 states and 6878 transitions. [2021-11-03 05:16:51,080 INFO L78 Accepts]: Start accepts. Automaton has 5112 states and 6878 transitions. Word has length 150 [2021-11-03 05:16:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:51,080 INFO L470 AbstractCegarLoop]: Abstraction has 5112 states and 6878 transitions. [2021-11-03 05:16:51,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 5112 states and 6878 transitions. [2021-11-03 05:16:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-03 05:16:51,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:51,083 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:51,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2021-11-03 05:16:51,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-03 05:16:51,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:16:51,484 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr113ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:16:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:51,484 INFO L85 PathProgramCache]: Analyzing trace with hash 192637924, now seen corresponding path program 1 times [2021-11-03 05:16:51,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:51,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660254314] [2021-11-03 05:16:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:51,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:51,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:51,488 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:51,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-03 05:16:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:58,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:16:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:16:59,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:17:00,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:00,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660254314] [2021-11-03 05:17:00,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660254314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:17:00,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2022578568] [2021-11-03 05:17:00,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:00,787 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:17:00,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:17:00,788 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:17:00,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-03 05:17:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:05,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:17:05,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:17:06,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:17:07,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2022578568] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:07,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:17:07,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-03 05:17:07,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461431231] [2021-11-03 05:17:07,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:17:07,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:07,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:17:07,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:17:07,086 INFO L87 Difference]: Start difference. First operand 5112 states and 6878 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:08,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:08,484 INFO L93 Difference]: Finished difference Result 6962 states and 9343 transitions. [2021-11-03 05:17:08,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:17:08,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 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 162 [2021-11-03 05:17:08,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:08,491 INFO L225 Difference]: With dead ends: 6962 [2021-11-03 05:17:08,491 INFO L226 Difference]: Without dead ends: 6012 [2021-11-03 05:17:08,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:17:08,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2021-11-03 05:17:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 5112. [2021-11-03 05:17:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5112 states, 5073 states have (on average 1.3556081214271634) internal successors, (6877), 5111 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5112 states to 5112 states and 6877 transitions. [2021-11-03 05:17:09,309 INFO L78 Accepts]: Start accepts. Automaton has 5112 states and 6877 transitions. Word has length 162 [2021-11-03 05:17:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:09,309 INFO L470 AbstractCegarLoop]: Abstraction has 5112 states and 6877 transitions. [2021-11-03 05:17:09,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 5112 states and 6877 transitions. [2021-11-03 05:17:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-03 05:17:09,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:09,312 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:09,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:09,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:09,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:09,713 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr113ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:17:09,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:09,713 INFO L85 PathProgramCache]: Analyzing trace with hash 445130423, now seen corresponding path program 1 times [2021-11-03 05:17:09,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:09,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549153490] [2021-11-03 05:17:09,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:09,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:09,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:09,717 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:09,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-03 05:17:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:16,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:17:16,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:17:17,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:17:18,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:18,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549153490] [2021-11-03 05:17:18,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549153490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:17:18,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1743219912] [2021-11-03 05:17:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:18,994 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:17:18,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:17:18,995 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:17:18,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2021-11-03 05:17:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:24,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:17:24,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:17:25,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:17:25,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1743219912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:25,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:17:25,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-03 05:17:25,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151732222] [2021-11-03 05:17:25,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:17:25,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:17:25,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:17:25,892 INFO L87 Difference]: Start difference. First operand 5112 states and 6877 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:27,310 INFO L93 Difference]: Finished difference Result 6012 states and 8083 transitions. [2021-11-03 05:17:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:17:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-11-03 05:17:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:27,316 INFO L225 Difference]: With dead ends: 6012 [2021-11-03 05:17:27,317 INFO L226 Difference]: Without dead ends: 5062 [2021-11-03 05:17:27,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:17:27,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5062 states. [2021-11-03 05:17:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5062 to 4162. [2021-11-03 05:17:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 4132 states have (on average 1.3593901258470473) internal successors, (5617), 4161 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 5617 transitions. [2021-11-03 05:17:27,972 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 5617 transitions. Word has length 163 [2021-11-03 05:17:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:27,973 INFO L470 AbstractCegarLoop]: Abstraction has 4162 states and 5617 transitions. [2021-11-03 05:17:27,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 5617 transitions. [2021-11-03 05:17:27,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-03 05:17:27,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:27,977 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:28,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:28,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:28,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:17:28,378 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:17:28,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:28,378 INFO L85 PathProgramCache]: Analyzing trace with hash -308134070, now seen corresponding path program 1 times [2021-11-03 05:17:28,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:28,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830109712] [2021-11-03 05:17:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:28,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:28,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:28,383 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:28,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-03 05:17:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:36,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1947 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:17:36,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:17:37,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:17:38,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:38,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830109712] [2021-11-03 05:17:38,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830109712] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:17:38,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1013047350] [2021-11-03 05:17:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:38,570 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:17:38,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:17:38,570 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:17:38,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-11-03 05:17:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:44,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1947 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:17:44,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:17:44,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:17:45,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1013047350] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:45,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:17:45,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:17:45,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036047874] [2021-11-03 05:17:45,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:17:45,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:45,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:17:45,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:17:45,291 INFO L87 Difference]: Start difference. First operand 4162 states and 5617 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:50,184 INFO L93 Difference]: Finished difference Result 8284 states and 11188 transitions. [2021-11-03 05:17:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:17:50,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-03 05:17:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:50,235 INFO L225 Difference]: With dead ends: 8284 [2021-11-03 05:17:50,235 INFO L226 Difference]: Without dead ends: 4164 [2021-11-03 05:17:50,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 685 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:17:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2021-11-03 05:17:50,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 4164. [2021-11-03 05:17:50,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4164 states, 4134 states have (on average 1.3592162554426706) internal successors, (5619), 4163 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4164 states to 4164 states and 5619 transitions. [2021-11-03 05:17:50,901 INFO L78 Accepts]: Start accepts. Automaton has 4164 states and 5619 transitions. Word has length 174 [2021-11-03 05:17:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:50,902 INFO L470 AbstractCegarLoop]: Abstraction has 4164 states and 5619 transitions. [2021-11-03 05:17:50,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:50,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4164 states and 5619 transitions. [2021-11-03 05:17:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-03 05:17:50,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:50,905 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:50,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:51,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:51,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:51,305 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:17:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:51,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2141466060, now seen corresponding path program 1 times [2021-11-03 05:17:51,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:51,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920200525] [2021-11-03 05:17:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:51,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:51,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:51,310 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:51,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-03 05:17:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:59,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 1950 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:17:59,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:18:00,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:18:02,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:02,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920200525] [2021-11-03 05:18:02,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920200525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:18:02,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1372898939] [2021-11-03 05:18:02,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:02,124 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:18:02,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:18:02,125 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:18:02,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-11-03 05:18:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:08,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 1950 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:18:08,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:18:08,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:18:09,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1372898939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:09,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:18:09,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 05:18:09,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247372454] [2021-11-03 05:18:09,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:18:09,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:09,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:18:09,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:18:09,107 INFO L87 Difference]: Start difference. First operand 4164 states and 5619 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:16,200 INFO L93 Difference]: Finished difference Result 8289 states and 11194 transitions. [2021-11-03 05:18:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:18:16,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-03 05:18:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:16,206 INFO L225 Difference]: With dead ends: 8289 [2021-11-03 05:18:16,206 INFO L226 Difference]: Without dead ends: 4167 [2021-11-03 05:18:16,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 685 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:18:16,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2021-11-03 05:18:16,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 4167. [2021-11-03 05:18:16,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4167 states, 4137 states have (on average 1.3589557650471356) internal successors, (5622), 4166 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4167 states to 4167 states and 5622 transitions. [2021-11-03 05:18:16,864 INFO L78 Accepts]: Start accepts. Automaton has 4167 states and 5622 transitions. Word has length 174 [2021-11-03 05:18:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:16,865 INFO L470 AbstractCegarLoop]: Abstraction has 4167 states and 5622 transitions. [2021-11-03 05:18:16,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 4167 states and 5622 transitions. [2021-11-03 05:18:16,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-03 05:18:16,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:16,868 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:16,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:17,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:17,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:18:17,270 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:18:17,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1747099274, now seen corresponding path program 1 times [2021-11-03 05:18:17,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:17,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471393547] [2021-11-03 05:18:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:17,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:17,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:17,274 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:17,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-11-03 05:18:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:25,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1953 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:18:25,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:18:26,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:18:27,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:27,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471393547] [2021-11-03 05:18:27,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471393547] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:18:27,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1033708864] [2021-11-03 05:18:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:27,701 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:18:27,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:18:27,701 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:18:27,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2021-11-03 05:18:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:33,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1953 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:18:33,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:18:34,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:18:35,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1033708864] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:35,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:18:35,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-03 05:18:35,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355288580] [2021-11-03 05:18:35,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:18:35,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:35,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:18:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:18:35,292 INFO L87 Difference]: Start difference. First operand 4167 states and 5622 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:46,032 INFO L93 Difference]: Finished difference Result 19392 states and 26078 transitions. [2021-11-03 05:18:46,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:18:46,033 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 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 174 [2021-11-03 05:18:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:46,049 INFO L225 Difference]: With dead ends: 19392 [2021-11-03 05:18:46,049 INFO L226 Difference]: Without dead ends: 15267 [2021-11-03 05:18:46,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:18:46,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15267 states. [2021-11-03 05:18:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15267 to 4173. [2021-11-03 05:18:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4143 states have (on average 1.3584359160028965) internal successors, (5628), 4172 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 5628 transitions. [2021-11-03 05:18:46,810 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 5628 transitions. Word has length 174 [2021-11-03 05:18:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:46,810 INFO L470 AbstractCegarLoop]: Abstraction has 4173 states and 5628 transitions. [2021-11-03 05:18:46,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:46,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 5628 transitions. [2021-11-03 05:18:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-03 05:18:46,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:46,813 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:46,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:47,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:47,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:47,214 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:18:47,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:47,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1732117517, now seen corresponding path program 1 times [2021-11-03 05:18:47,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:47,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298845204] [2021-11-03 05:18:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:47,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:47,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:47,218 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:47,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-03 05:18:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:55,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:18:55,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:18:56,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:18:57,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:57,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298845204] [2021-11-03 05:18:57,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298845204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:18:57,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [908794688] [2021-11-03 05:18:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:57,796 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:18:57,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:18:57,798 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:18:57,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2021-11-03 05:19:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:04,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:19:04,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:19:04,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:19:05,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [908794688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:05,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:19:05,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-03 05:19:05,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358337026] [2021-11-03 05:19:05,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:19:05,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:05,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:19:05,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:19:05,598 INFO L87 Difference]: Start difference. First operand 4173 states and 5628 transitions. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:21,761 INFO L93 Difference]: Finished difference Result 34446 states and 46260 transitions. [2021-11-03 05:19:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:19:21,762 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-11-03 05:19:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:21,796 INFO L225 Difference]: With dead ends: 34446 [2021-11-03 05:19:21,796 INFO L226 Difference]: Without dead ends: 30315 [2021-11-03 05:19:21,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 691 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:19:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30315 states. [2021-11-03 05:19:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30315 to 4260. [2021-11-03 05:19:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4260 states, 4230 states have (on average 1.3567375886524822) internal successors, (5739), 4259 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4260 states to 4260 states and 5739 transitions. [2021-11-03 05:19:22,769 INFO L78 Accepts]: Start accepts. Automaton has 4260 states and 5739 transitions. Word has length 175 [2021-11-03 05:19:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:22,770 INFO L470 AbstractCegarLoop]: Abstraction has 4260 states and 5739 transitions. [2021-11-03 05:19:22,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4260 states and 5739 transitions. [2021-11-03 05:19:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-03 05:19:22,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:22,775 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:19:22,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:23,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:23,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:23,198 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-03 05:19:23,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:23,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1911049813, now seen corresponding path program 1 times [2021-11-03 05:19:23,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:23,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450081146] [2021-11-03 05:19:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:23,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:23,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:23,204 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:23,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-03 05:19:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:31,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 1990 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:19:31,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:19:32,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 05:19:33,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:33,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450081146] [2021-11-03 05:19:33,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450081146] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:19:33,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2028926688] [2021-11-03 05:19:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:33,906 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:19:33,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:19:33,907 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:19:33,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea90db9-b1fe-439a-b8b6-d68b77929a31/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process