./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec1_product14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7bf93f828cd20929ce9c5f311b0e320b3840eed4f400e7f2f8e12c9cdbceb4d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:09:41,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:09:41,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:09:41,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:09:41,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:09:41,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:09:41,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:09:41,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:09:41,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:09:41,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:09:41,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:09:41,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:09:41,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:09:41,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:09:41,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:09:41,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:09:41,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:09:41,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:09:41,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:09:41,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:09:41,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:09:41,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:09:41,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:09:41,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:09:41,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:09:41,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:09:41,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:09:41,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:09:41,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:09:41,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:09:41,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:09:41,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:09:41,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:09:41,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:09:41,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:09:41,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:09:41,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:09:41,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:09:41,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:09:41,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:09:41,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:09:41,165 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:09:41,195 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:09:41,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:09:41,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:09:41,197 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:09:41,198 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:09:41,198 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:09:41,198 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:09:41,198 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:09:41,205 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:09:41,205 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:09:41,206 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:09:41,206 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:09:41,207 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:09:41,207 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:09:41,207 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:09:41,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:09:41,208 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:09:41,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:09:41,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:09:41,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:09:41,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:09:41,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:09:41,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:09:41,209 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:09:41,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:09:41,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:09:41,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:09:41,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:09:41,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:09:41,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:09:41,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:41,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:09:41,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:09:41,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:09:41,213 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:09:41,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:09:41,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:09:41,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:09:41,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:09:41,214 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_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7bf93f828cd20929ce9c5f311b0e320b3840eed4f400e7f2f8e12c9cdbceb4d2 [2021-11-07 01:09:41,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:09:41,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:09:41,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:09:41,525 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:09:41,526 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:09:41,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product14.cil.c [2021-11-07 01:09:41,595 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/data/e529e737d/1d5fd77589704b209fea4f5b6827ff51/FLAG98285e8d1 [2021-11-07 01:09:42,160 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:09:42,171 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/sv-benchmarks/c/product-lines/email_spec1_product14.cil.c [2021-11-07 01:09:42,211 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/data/e529e737d/1d5fd77589704b209fea4f5b6827ff51/FLAG98285e8d1 [2021-11-07 01:09:42,410 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/data/e529e737d/1d5fd77589704b209fea4f5b6827ff51 [2021-11-07 01:09:42,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:09:42,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:09:42,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:42,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:09:42,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:09:42,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:42" (1/1) ... [2021-11-07 01:09:42,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ce4acad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:42, skipping insertion in model container [2021-11-07 01:09:42,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:42" (1/1) ... [2021-11-07 01:09:42,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:09:42,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:43,272 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_92e57c29-891e-460f-ade6-066db354fdc5/sv-benchmarks/c/product-lines/email_spec1_product14.cil.c[62671,62684] [2021-11-07 01:09:43,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:43,294 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:09:43,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a943f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:43, skipping insertion in model container [2021-11-07 01:09:43,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:43,296 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:09:43,299 INFO L168 Benchmark]: Toolchain (without parser) took 882.74 ms. Allocated memory is still 104.9 MB. Free memory was 62.1 MB in the beginning and 65.7 MB in the end (delta: -3.6 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:43,300 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 104.9 MB. Free memory is still 81.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:09:43,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 879.99 ms. Allocated memory is still 104.9 MB. Free memory was 61.9 MB in the beginning and 65.7 MB in the end (delta: -3.9 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:43,304 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 104.9 MB. Free memory is still 81.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 879.99 ms. Allocated memory is still 104.9 MB. Free memory was 61.9 MB in the beginning and 65.7 MB in the end (delta: -3.9 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1646]: 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_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7bf93f828cd20929ce9c5f311b0e320b3840eed4f400e7f2f8e12c9cdbceb4d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:09:45,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:09:45,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:09:45,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:09:45,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:09:45,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:09:45,735 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:09:45,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:09:45,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:09:45,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:09:45,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:09:45,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:09:45,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:09:45,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:09:45,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:09:45,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:09:45,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:09:45,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:09:45,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:09:45,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:09:45,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:09:45,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:09:45,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:09:45,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:09:45,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:09:45,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:09:45,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:09:45,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:09:45,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:09:45,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:09:45,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:09:45,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:09:45,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:09:45,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:09:45,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:09:45,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:09:45,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:09:45,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:09:45,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:09:45,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:09:45,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:09:45,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:09:45,854 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:09:45,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:09:45,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:09:45,857 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:09:45,857 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:09:45,857 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:09:45,857 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:09:45,858 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:09:45,858 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:09:45,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:09:45,861 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:09:45,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:09:45,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:09:45,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:09:45,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:09:45,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:09:45,862 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:09:45,863 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:09:45,863 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:09:45,863 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:09:45,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:09:45,864 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:09:45,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:09:45,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:09:45,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:09:45,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:09:45,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:45,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:09:45,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:09:45,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:09:45,866 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:09:45,866 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:09:45,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:09:45,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:09:45,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:09:45,868 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_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7bf93f828cd20929ce9c5f311b0e320b3840eed4f400e7f2f8e12c9cdbceb4d2 [2021-11-07 01:09:46,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:09:46,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:09:46,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:09:46,313 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:09:46,314 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:09:46,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product14.cil.c [2021-11-07 01:09:46,384 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/data/91d8e7fd3/f18d043423754490bb2fb448419d1e5d/FLAG73d1c706e [2021-11-07 01:09:47,167 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:09:47,167 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/sv-benchmarks/c/product-lines/email_spec1_product14.cil.c [2021-11-07 01:09:47,186 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/data/91d8e7fd3/f18d043423754490bb2fb448419d1e5d/FLAG73d1c706e [2021-11-07 01:09:47,310 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/data/91d8e7fd3/f18d043423754490bb2fb448419d1e5d [2021-11-07 01:09:47,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:09:47,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:09:47,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:47,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:09:47,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:09:47,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:47" (1/1) ... [2021-11-07 01:09:47,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21127b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:47, skipping insertion in model container [2021-11-07 01:09:47,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:47" (1/1) ... [2021-11-07 01:09:47,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:09:47,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:48,178 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_92e57c29-891e-460f-ade6-066db354fdc5/sv-benchmarks/c/product-lines/email_spec1_product14.cil.c[62671,62684] [2021-11-07 01:09:48,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:48,213 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:09:48,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:48,361 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_92e57c29-891e-460f-ade6-066db354fdc5/sv-benchmarks/c/product-lines/email_spec1_product14.cil.c[62671,62684] [2021-11-07 01:09:48,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:48,371 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:09:48,481 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_92e57c29-891e-460f-ade6-066db354fdc5/sv-benchmarks/c/product-lines/email_spec1_product14.cil.c[62671,62684] [2021-11-07 01:09:48,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:48,528 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:09:48,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:48 WrapperNode [2021-11-07 01:09:48,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:48,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:09:48,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:09:48,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:09:48,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:48" (1/1) ... [2021-11-07 01:09:48,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:48" (1/1) ... [2021-11-07 01:09:48,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:09:48,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:09:48,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:09:48,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:09:48,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:48" (1/1) ... [2021-11-07 01:09:48,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:48" (1/1) ... [2021-11-07 01:09:48,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:48" (1/1) ... [2021-11-07 01:09:48,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:48" (1/1) ... [2021-11-07 01:09:48,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:48" (1/1) ... [2021-11-07 01:09:48,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:48" (1/1) ... [2021-11-07 01:09:48,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:48" (1/1) ... [2021-11-07 01:09:48,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:09:48,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:09:48,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:09:48,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:09:48,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:48" (1/1) ... [2021-11-07 01:09:48,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:48,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:09:48,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:09:48,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:09:48,994 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:09:48,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:09:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:09:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:09:48,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:09:54,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:09:54,478 INFO L299 CfgBuilder]: Removed 453 assume(true) statements. [2021-11-07 01:09:54,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:09:54 BoogieIcfgContainer [2021-11-07 01:09:54,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:09:54,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:09:54,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:09:54,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:09:54,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:09:47" (1/3) ... [2021-11-07 01:09:54,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b742f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:09:54, skipping insertion in model container [2021-11-07 01:09:54,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:48" (2/3) ... [2021-11-07 01:09:54,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b742f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:09:54, skipping insertion in model container [2021-11-07 01:09:54,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:09:54" (3/3) ... [2021-11-07 01:09:54,491 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec1_product14.cil.c [2021-11-07 01:09:54,497 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:09:54,497 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:09:54,566 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:09:54,574 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:09:54,575 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:09:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 760 states, 753 states have (on average 1.7755644090305445) internal successors, (1337), 759 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:09:54,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:54,654 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:54,655 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:54,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:54,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1142639530, now seen corresponding path program 1 times [2021-11-07 01:09:54,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:54,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673219664] [2021-11-07 01:09:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:54,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:54,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:54,687 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:54,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:09:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:55,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:09:55,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:55,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:55,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:55,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673219664] [2021-11-07 01:09:55,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673219664] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:55,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:55,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:09:55,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462257846] [2021-11-07 01:09:55,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:09:55,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:09:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:09:55,447 INFO L87 Difference]: Start difference. First operand has 760 states, 753 states have (on average 1.7755644090305445) internal successors, (1337), 759 states have internal predecessors, (1337), 0 states have call successors, (0), 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 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:55,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:55,541 INFO L93 Difference]: Finished difference Result 1239 states and 2158 transitions. [2021-11-07 01:09:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:09:55,543 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-11-07 01:09:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:55,585 INFO L225 Difference]: With dead ends: 1239 [2021-11-07 01:09:55,585 INFO L226 Difference]: Without dead ends: 698 [2021-11-07 01:09:55,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:09:55,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-11-07 01:09:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 698. [2021-11-07 01:09:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 692 states have (on average 1.7658959537572254) internal successors, (1222), 697 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1222 transitions. [2021-11-07 01:09:55,670 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1222 transitions. Word has length 44 [2021-11-07 01:09:55,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:55,671 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 1222 transitions. [2021-11-07 01:09:55,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1222 transitions. [2021-11-07 01:09:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:09:55,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:55,674 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:55,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:55,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:55,889 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:55,889 INFO L85 PathProgramCache]: Analyzing trace with hash 312800343, now seen corresponding path program 1 times [2021-11-07 01:09:55,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:55,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150645472] [2021-11-07 01:09:55,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:55,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:55,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:55,892 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:55,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:09:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:56,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:09:56,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:56,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:56,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:56,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150645472] [2021-11-07 01:09:56,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150645472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:56,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:56,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:56,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025397631] [2021-11-07 01:09:56,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:56,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:56,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:56,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:56,585 INFO L87 Difference]: Start difference. First operand 698 states and 1222 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:56,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:56,754 INFO L93 Difference]: Finished difference Result 2064 states and 3618 transitions. [2021-11-07 01:09:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:56,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 45 [2021-11-07 01:09:56,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:56,765 INFO L225 Difference]: With dead ends: 2064 [2021-11-07 01:09:56,765 INFO L226 Difference]: Without dead ends: 1381 [2021-11-07 01:09:56,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:56,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-11-07 01:09:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 697. [2021-11-07 01:09:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 691 states have (on average 1.7612156295224313) internal successors, (1217), 696 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1217 transitions. [2021-11-07 01:09:56,829 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1217 transitions. Word has length 45 [2021-11-07 01:09:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:56,830 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1217 transitions. [2021-11-07 01:09:56,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1217 transitions. [2021-11-07 01:09:56,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:09:56,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:56,839 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:56,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:57,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:57,059 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:57,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:57,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1411726013, now seen corresponding path program 1 times [2021-11-07 01:09:57,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:57,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217098012] [2021-11-07 01:09:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:57,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:57,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:57,068 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:57,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:09:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:57,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:09:57,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:57,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:57,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:57,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217098012] [2021-11-07 01:09:57,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217098012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:57,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:57,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:57,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085310862] [2021-11-07 01:09:57,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:57,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:57,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:57,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:57,856 INFO L87 Difference]: Start difference. First operand 697 states and 1217 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:58,208 INFO L93 Difference]: Finished difference Result 2705 states and 4730 transitions. [2021-11-07 01:09:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:09:58,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 47 [2021-11-07 01:09:58,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:58,223 INFO L225 Difference]: With dead ends: 2705 [2021-11-07 01:09:58,223 INFO L226 Difference]: Without dead ends: 2026 [2021-11-07 01:09:58,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:09:58,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-11-07 01:09:58,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 696. [2021-11-07 01:09:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 690 states have (on average 1.7579710144927536) internal successors, (1213), 695 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1213 transitions. [2021-11-07 01:09:58,287 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1213 transitions. Word has length 47 [2021-11-07 01:09:58,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:58,288 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 1213 transitions. [2021-11-07 01:09:58,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1213 transitions. [2021-11-07 01:09:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:09:58,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:58,293 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:58,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:58,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:58,514 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:58,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:58,515 INFO L85 PathProgramCache]: Analyzing trace with hash 499625936, now seen corresponding path program 1 times [2021-11-07 01:09:58,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:58,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541175765] [2021-11-07 01:09:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:58,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:58,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:58,517 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:58,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:09:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:58,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:09:58,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:59,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:59,182 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:59,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541175765] [2021-11-07 01:09:59,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541175765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:59,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:59,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:59,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220600161] [2021-11-07 01:09:59,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:59,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:59,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:59,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:59,186 INFO L87 Difference]: Start difference. First operand 696 states and 1213 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:59,278 INFO L93 Difference]: Finished difference Result 1389 states and 2423 transitions. [2021-11-07 01:09:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:59,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 48 [2021-11-07 01:09:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:59,284 INFO L225 Difference]: With dead ends: 1389 [2021-11-07 01:09:59,284 INFO L226 Difference]: Without dead ends: 701 [2021-11-07 01:09:59,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:59,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-11-07 01:09:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 696. [2021-11-07 01:09:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 690 states have (on average 1.7536231884057971) internal successors, (1210), 695 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1210 transitions. [2021-11-07 01:09:59,331 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1210 transitions. Word has length 48 [2021-11-07 01:09:59,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:59,331 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 1210 transitions. [2021-11-07 01:09:59,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1210 transitions. [2021-11-07 01:09:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:09:59,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:59,333 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:59,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:09:59,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:59,551 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:59,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1527540133, now seen corresponding path program 1 times [2021-11-07 01:09:59,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:59,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469125765] [2021-11-07 01:09:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:59,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:59,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:59,554 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:59,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:09:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:59,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:09:59,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:00,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:00,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:00,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469125765] [2021-11-07 01:10:00,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469125765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:00,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:00,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:00,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734643488] [2021-11-07 01:10:00,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:00,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:00,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:00,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:00,255 INFO L87 Difference]: Start difference. First operand 696 states and 1210 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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) [2021-11-07 01:10:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:00,606 INFO L93 Difference]: Finished difference Result 2692 states and 4706 transitions. [2021-11-07 01:10:00,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:10:00,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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 49 [2021-11-07 01:10:00,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:00,620 INFO L225 Difference]: With dead ends: 2692 [2021-11-07 01:10:00,620 INFO L226 Difference]: Without dead ends: 2022 [2021-11-07 01:10:00,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:10:00,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-11-07 01:10:00,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 696. [2021-11-07 01:10:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 690 states have (on average 1.7492753623188406) internal successors, (1207), 695 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:00,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1207 transitions. [2021-11-07 01:10:00,683 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1207 transitions. Word has length 49 [2021-11-07 01:10:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:00,683 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 1207 transitions. [2021-11-07 01:10:00,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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) [2021-11-07 01:10:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1207 transitions. [2021-11-07 01:10:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:10:00,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:00,686 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:00,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:00,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:00,900 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:00,900 INFO L85 PathProgramCache]: Analyzing trace with hash -194695136, now seen corresponding path program 1 times [2021-11-07 01:10:00,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:00,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226017765] [2021-11-07 01:10:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:00,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:00,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:00,903 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:00,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:10:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:01,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:01,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:01,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:01,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:01,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226017765] [2021-11-07 01:10:01,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226017765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:01,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:01,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:01,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295019080] [2021-11-07 01:10:01,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:01,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:01,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:01,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:01,635 INFO L87 Difference]: Start difference. First operand 696 states and 1207 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 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) [2021-11-07 01:10:01,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:01,779 INFO L93 Difference]: Finished difference Result 1783 states and 3093 transitions. [2021-11-07 01:10:01,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:01,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 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 51 [2021-11-07 01:10:01,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:01,788 INFO L225 Difference]: With dead ends: 1783 [2021-11-07 01:10:01,789 INFO L226 Difference]: Without dead ends: 1366 [2021-11-07 01:10:01,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:01,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-11-07 01:10:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 949. [2021-11-07 01:10:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 943 states have (on average 1.7741251325556733) internal successors, (1673), 948 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1673 transitions. [2021-11-07 01:10:01,866 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1673 transitions. Word has length 51 [2021-11-07 01:10:01,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:01,866 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1673 transitions. [2021-11-07 01:10:01,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 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) [2021-11-07 01:10:01,867 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1673 transitions. [2021-11-07 01:10:01,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:10:01,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:01,869 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:01,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:02,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:02,085 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:02,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:02,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1735624239, now seen corresponding path program 1 times [2021-11-07 01:10:02,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:02,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649030101] [2021-11-07 01:10:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:02,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:02,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:02,089 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:02,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:10:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:02,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:02,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:02,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:02,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:02,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649030101] [2021-11-07 01:10:02,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649030101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:02,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:02,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:02,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199034660] [2021-11-07 01:10:02,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:02,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:02,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:02,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:02,855 INFO L87 Difference]: Start difference. First operand 949 states and 1673 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:02,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:02,993 INFO L93 Difference]: Finished difference Result 2432 states and 4292 transitions. [2021-11-07 01:10:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:02,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-07 01:10:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:03,003 INFO L225 Difference]: With dead ends: 2432 [2021-11-07 01:10:03,004 INFO L226 Difference]: Without dead ends: 1567 [2021-11-07 01:10:03,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:03,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2021-11-07 01:10:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1150. [2021-11-07 01:10:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1144 states have (on average 1.784965034965035) internal successors, (2042), 1149 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 2042 transitions. [2021-11-07 01:10:03,106 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 2042 transitions. Word has length 63 [2021-11-07 01:10:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:03,106 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 2042 transitions. [2021-11-07 01:10:03,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 2042 transitions. [2021-11-07 01:10:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:10:03,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:03,109 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:03,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:03,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:03,324 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:03,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:03,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1861184080, now seen corresponding path program 1 times [2021-11-07 01:10:03,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:03,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676259924] [2021-11-07 01:10:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:03,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:03,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:03,327 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:03,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:10:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:03,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:03,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:03,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:04,092 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:04,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676259924] [2021-11-07 01:10:04,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676259924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:04,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:04,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:04,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352757797] [2021-11-07 01:10:04,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:04,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:04,098 INFO L87 Difference]: Start difference. First operand 1150 states and 2042 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:04,290 INFO L93 Difference]: Finished difference Result 3079 states and 5485 transitions. [2021-11-07 01:10:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:04,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-07 01:10:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:04,303 INFO L225 Difference]: With dead ends: 3079 [2021-11-07 01:10:04,303 INFO L226 Difference]: Without dead ends: 2017 [2021-11-07 01:10:04,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-11-07 01:10:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1600. [2021-11-07 01:10:04,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1594 states have (on average 1.8005018820577163) internal successors, (2870), 1599 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2870 transitions. [2021-11-07 01:10:04,441 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2870 transitions. Word has length 64 [2021-11-07 01:10:04,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:04,441 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2870 transitions. [2021-11-07 01:10:04,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2870 transitions. [2021-11-07 01:10:04,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:10:04,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:04,445 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:04,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:04,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:04,660 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:04,661 INFO L85 PathProgramCache]: Analyzing trace with hash 858400128, now seen corresponding path program 1 times [2021-11-07 01:10:04,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:04,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073871531] [2021-11-07 01:10:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:04,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:04,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:04,664 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:04,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:10:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:05,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:05,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:05,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:05,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:05,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073871531] [2021-11-07 01:10:05,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073871531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:05,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:05,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:05,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958522782] [2021-11-07 01:10:05,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:05,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:05,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:05,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:05,411 INFO L87 Difference]: Start difference. First operand 1600 states and 2870 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:05,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:05,561 INFO L93 Difference]: Finished difference Result 3332 states and 5948 transitions. [2021-11-07 01:10:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:05,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 65 [2021-11-07 01:10:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:05,598 INFO L225 Difference]: With dead ends: 3332 [2021-11-07 01:10:05,598 INFO L226 Difference]: Without dead ends: 2017 [2021-11-07 01:10:05,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:05,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-11-07 01:10:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1600. [2021-11-07 01:10:05,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1594 states have (on average 1.7992471769134253) internal successors, (2868), 1599 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2868 transitions. [2021-11-07 01:10:05,733 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2868 transitions. Word has length 65 [2021-11-07 01:10:05,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:05,733 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2868 transitions. [2021-11-07 01:10:05,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:05,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2868 transitions. [2021-11-07 01:10:05,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:10:05,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:05,737 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:05,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:05,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:05,952 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:05,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1395317249, now seen corresponding path program 1 times [2021-11-07 01:10:05,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:05,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777518711] [2021-11-07 01:10:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:05,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:05,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:05,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:05,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:10:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:06,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:06,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:06,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:06,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:06,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777518711] [2021-11-07 01:10:06,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777518711] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:06,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:06,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:06,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520900229] [2021-11-07 01:10:06,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:06,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:06,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:06,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:06,757 INFO L87 Difference]: Start difference. First operand 1600 states and 2868 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:06,975 INFO L93 Difference]: Finished difference Result 4401 states and 7918 transitions. [2021-11-07 01:10:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:06,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-07 01:10:06,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:06,994 INFO L225 Difference]: With dead ends: 4401 [2021-11-07 01:10:06,995 INFO L226 Difference]: Without dead ends: 2897 [2021-11-07 01:10:06,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-11-07 01:10:07,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2480. [2021-11-07 01:10:07,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2474 states have (on average 1.8136620856911883) internal successors, (4487), 2479 states have internal predecessors, (4487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 4487 transitions. [2021-11-07 01:10:07,198 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 4487 transitions. Word has length 65 [2021-11-07 01:10:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:07,199 INFO L470 AbstractCegarLoop]: Abstraction has 2480 states and 4487 transitions. [2021-11-07 01:10:07,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 4487 transitions. [2021-11-07 01:10:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:10:07,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:07,209 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:07,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:07,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:07,424 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:07,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1003858830, now seen corresponding path program 1 times [2021-11-07 01:10:07,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:07,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277775642] [2021-11-07 01:10:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:07,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:07,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:07,426 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:07,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:10:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:07,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:07,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:08,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:08,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:08,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277775642] [2021-11-07 01:10:08,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277775642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:08,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:08,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:08,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217773779] [2021-11-07 01:10:08,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:08,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:08,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:08,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:08,209 INFO L87 Difference]: Start difference. First operand 2480 states and 4487 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:08,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:08,476 INFO L93 Difference]: Finished difference Result 6777 states and 12294 transitions. [2021-11-07 01:10:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:08,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-07 01:10:08,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:08,506 INFO L225 Difference]: With dead ends: 6777 [2021-11-07 01:10:08,506 INFO L226 Difference]: Without dead ends: 4427 [2021-11-07 01:10:08,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:08,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2021-11-07 01:10:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 4010. [2021-11-07 01:10:08,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4010 states, 4004 states have (on average 1.8231768231768233) internal successors, (7300), 4009 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4010 states to 4010 states and 7300 transitions. [2021-11-07 01:10:08,811 INFO L78 Accepts]: Start accepts. Automaton has 4010 states and 7300 transitions. Word has length 66 [2021-11-07 01:10:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:08,812 INFO L470 AbstractCegarLoop]: Abstraction has 4010 states and 7300 transitions. [2021-11-07 01:10:08,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4010 states and 7300 transitions. [2021-11-07 01:10:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:10:08,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:08,821 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:08,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:09,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:09,035 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:09,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:09,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1565632880, now seen corresponding path program 1 times [2021-11-07 01:10:09,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:09,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890204664] [2021-11-07 01:10:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:09,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:09,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:09,038 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:09,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:10:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:09,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:09,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:09,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:09,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:09,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890204664] [2021-11-07 01:10:09,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890204664] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:09,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:09,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:09,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482921234] [2021-11-07 01:10:09,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:09,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:09,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:09,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:09,990 INFO L87 Difference]: Start difference. First operand 4010 states and 7300 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:10,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:10,385 INFO L93 Difference]: Finished difference Result 11083 states and 20216 transitions. [2021-11-07 01:10:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:10,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-07 01:10:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:10,420 INFO L225 Difference]: With dead ends: 11083 [2021-11-07 01:10:10,420 INFO L226 Difference]: Without dead ends: 7237 [2021-11-07 01:10:10,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:10,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7237 states. [2021-11-07 01:10:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7237 to 6820. [2021-11-07 01:10:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6820 states, 6814 states have (on average 1.8287349574405636) internal successors, (12461), 6819 states have internal predecessors, (12461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6820 states to 6820 states and 12461 transitions. [2021-11-07 01:10:10,935 INFO L78 Accepts]: Start accepts. Automaton has 6820 states and 12461 transitions. Word has length 67 [2021-11-07 01:10:10,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:10,936 INFO L470 AbstractCegarLoop]: Abstraction has 6820 states and 12461 transitions. [2021-11-07 01:10:10,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6820 states and 12461 transitions. [2021-11-07 01:10:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:10:10,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:10,943 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:10,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:11,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:11,164 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:11,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:11,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1306443052, now seen corresponding path program 1 times [2021-11-07 01:10:11,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:11,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551488748] [2021-11-07 01:10:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:11,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:11,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:11,166 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:11,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:10:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:11,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:11,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:10:11,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:10:12,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:12,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551488748] [2021-11-07 01:10:12,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551488748] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:12,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:12,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:12,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621019917] [2021-11-07 01:10:12,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:12,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:12,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:12,189 INFO L87 Difference]: Start difference. First operand 6820 states and 12461 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:15,485 INFO L93 Difference]: Finished difference Result 25803 states and 47200 transitions. [2021-11-07 01:10:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:10:15,485 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:10:15,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:15,559 INFO L225 Difference]: With dead ends: 25803 [2021-11-07 01:10:15,559 INFO L226 Difference]: Without dead ends: 19266 [2021-11-07 01:10:15,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:10:15,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19266 states. [2021-11-07 01:10:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19266 to 6770. [2021-11-07 01:10:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6770 states, 6764 states have (on average 1.8126848018923714) internal successors, (12261), 6769 states have internal predecessors, (12261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6770 states to 6770 states and 12261 transitions. [2021-11-07 01:10:16,259 INFO L78 Accepts]: Start accepts. Automaton has 6770 states and 12261 transitions. Word has length 68 [2021-11-07 01:10:16,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:16,259 INFO L470 AbstractCegarLoop]: Abstraction has 6770 states and 12261 transitions. [2021-11-07 01:10:16,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 6770 states and 12261 transitions. [2021-11-07 01:10:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:10:16,266 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:16,267 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:16,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:16,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:16,480 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:16,480 INFO L85 PathProgramCache]: Analyzing trace with hash -184798429, now seen corresponding path program 1 times [2021-11-07 01:10:16,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:16,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766193568] [2021-11-07 01:10:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:16,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:16,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:16,482 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:16,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:10:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:17,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:17,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:17,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:17,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:17,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766193568] [2021-11-07 01:10:17,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766193568] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:17,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:17,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:17,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430377253] [2021-11-07 01:10:17,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:17,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:17,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:17,470 INFO L87 Difference]: Start difference. First operand 6770 states and 12261 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:18,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:18,145 INFO L93 Difference]: Finished difference Result 19824 states and 35953 transitions. [2021-11-07 01:10:18,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:18,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-07 01:10:18,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:18,189 INFO L225 Difference]: With dead ends: 19824 [2021-11-07 01:10:18,190 INFO L226 Difference]: Without dead ends: 13221 [2021-11-07 01:10:18,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13221 states. [2021-11-07 01:10:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13221 to 12804. [2021-11-07 01:10:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12804 states, 12798 states have (on average 1.8145022659790593) internal successors, (23222), 12803 states have internal predecessors, (23222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12804 states to 12804 states and 23222 transitions. [2021-11-07 01:10:19,214 INFO L78 Accepts]: Start accepts. Automaton has 12804 states and 23222 transitions. Word has length 68 [2021-11-07 01:10:19,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:19,214 INFO L470 AbstractCegarLoop]: Abstraction has 12804 states and 23222 transitions. [2021-11-07 01:10:19,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 12804 states and 23222 transitions. [2021-11-07 01:10:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:10:19,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:19,225 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:19,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:19,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:19,440 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:19,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:19,440 INFO L85 PathProgramCache]: Analyzing trace with hash 943812431, now seen corresponding path program 1 times [2021-11-07 01:10:19,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:19,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096804842] [2021-11-07 01:10:19,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:19,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:19,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:19,442 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:19,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:10:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:20,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:20,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:20,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:20,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:20,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096804842] [2021-11-07 01:10:20,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096804842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:10:20,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [781865799] [2021-11-07 01:10:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:20,442 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:20,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:10:20,444 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:10:20,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:10:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:21,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:21,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:21,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [781865799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:21,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:10:21,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:10:21,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599104440] [2021-11-07 01:10:21,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:21,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:21,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:21,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:10:21,800 INFO L87 Difference]: Start difference. First operand 12804 states and 23222 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:22,531 INFO L93 Difference]: Finished difference Result 13114 states and 23748 transitions. [2021-11-07 01:10:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:22,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:10:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:22,663 INFO L225 Difference]: With dead ends: 13114 [2021-11-07 01:10:22,663 INFO L226 Difference]: Without dead ends: 12792 [2021-11-07 01:10:22,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:10:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12792 states. [2021-11-07 01:10:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12792 to 12792. [2021-11-07 01:10:23,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12792 states, 12788 states have (on average 1.8145136065060994) internal successors, (23204), 12791 states have internal predecessors, (23204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12792 states to 12792 states and 23204 transitions. [2021-11-07 01:10:23,348 INFO L78 Accepts]: Start accepts. Automaton has 12792 states and 23204 transitions. Word has length 69 [2021-11-07 01:10:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:23,349 INFO L470 AbstractCegarLoop]: Abstraction has 12792 states and 23204 transitions. [2021-11-07 01:10:23,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 12792 states and 23204 transitions. [2021-11-07 01:10:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:10:23,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:23,377 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:23,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:23,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 01:10:23,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:23,799 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:23,799 INFO L85 PathProgramCache]: Analyzing trace with hash -608908349, now seen corresponding path program 1 times [2021-11-07 01:10:23,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:23,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089874235] [2021-11-07 01:10:23,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:23,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:23,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:23,801 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:23,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:10:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:24,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:24,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:24,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:25,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:25,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089874235] [2021-11-07 01:10:25,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089874235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:10:25,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1517136409] [2021-11-07 01:10:25,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:25,113 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:25,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:10:25,123 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:10:25,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:10:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:26,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:10:26,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:26,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:27,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1517136409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:27,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:10:27,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:10:27,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457288176] [2021-11-07 01:10:27,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:10:27,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:27,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:10:27,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:10:27,311 INFO L87 Difference]: Start difference. First operand 12792 states and 23204 transitions. Second operand has 16 states, 16 states have (on average 8.9375) internal successors, (143), 15 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:46,985 INFO L93 Difference]: Finished difference Result 28306 states and 50959 transitions. [2021-11-07 01:10:46,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 01:10:46,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.9375) internal successors, (143), 15 states have internal predecessors, (143), 0 states have call successors, (0), 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 98 [2021-11-07 01:10:46,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:47,066 INFO L225 Difference]: With dead ends: 28306 [2021-11-07 01:10:47,067 INFO L226 Difference]: Without dead ends: 27958 [2021-11-07 01:10:47,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 01:10:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27958 states. [2021-11-07 01:10:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27958 to 25324. [2021-11-07 01:10:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25324 states, 25320 states have (on average 1.815560821484992) internal successors, (45970), 25323 states have internal predecessors, (45970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:48,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25324 states to 25324 states and 45970 transitions. [2021-11-07 01:10:48,462 INFO L78 Accepts]: Start accepts. Automaton has 25324 states and 45970 transitions. Word has length 98 [2021-11-07 01:10:48,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:48,463 INFO L470 AbstractCegarLoop]: Abstraction has 25324 states and 45970 transitions. [2021-11-07 01:10:48,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.9375) internal successors, (143), 15 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 25324 states and 45970 transitions. [2021-11-07 01:10:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 01:10:48,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:48,510 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:48,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:10:48,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:48,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:48,916 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:48,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:48,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1787360837, now seen corresponding path program 1 times [2021-11-07 01:10:48,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:48,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097778846] [2021-11-07 01:10:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:48,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:48,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:48,918 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:48,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:10:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:49,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:49,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:49,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:50,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:50,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097778846] [2021-11-07 01:10:50,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097778846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:10:50,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [736574427] [2021-11-07 01:10:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:50,280 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:50,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:10:50,288 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:10:50,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:10:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:51,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:51,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:51,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:51,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [736574427] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:51,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:10:51,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:10:51,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813930263] [2021-11-07 01:10:51,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:51,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:51,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:51,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:10:51,818 INFO L87 Difference]: Start difference. First operand 25324 states and 45970 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:52,715 INFO L93 Difference]: Finished difference Result 26064 states and 47227 transitions. [2021-11-07 01:10:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:52,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 99 [2021-11-07 01:10:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:52,780 INFO L225 Difference]: With dead ends: 26064 [2021-11-07 01:10:52,780 INFO L226 Difference]: Without dead ends: 25664 [2021-11-07 01:10:52,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:10:52,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25664 states. [2021-11-07 01:10:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25664 to 25323. [2021-11-07 01:10:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25323 states, 25319 states have (on average 1.8154745448082468) internal successors, (45966), 25322 states have internal predecessors, (45966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25323 states to 25323 states and 45966 transitions. [2021-11-07 01:10:54,265 INFO L78 Accepts]: Start accepts. Automaton has 25323 states and 45966 transitions. Word has length 99 [2021-11-07 01:10:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:54,266 INFO L470 AbstractCegarLoop]: Abstraction has 25323 states and 45966 transitions. [2021-11-07 01:10:54,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 25323 states and 45966 transitions. [2021-11-07 01:10:54,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 01:10:54,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:54,313 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:54,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:54,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:10:54,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:54,727 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:54,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:54,727 INFO L85 PathProgramCache]: Analyzing trace with hash 852890946, now seen corresponding path program 1 times [2021-11-07 01:10:54,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:54,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662188168] [2021-11-07 01:10:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:54,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:54,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:54,730 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:54,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:10:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:55,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:55,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:55,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:56,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:56,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662188168] [2021-11-07 01:10:56,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662188168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:10:56,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1652204281] [2021-11-07 01:10:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:56,205 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:56,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:10:56,214 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:10:56,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:10:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:57,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:10:57,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:57,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:57,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1652204281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:57,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:10:57,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-07 01:10:57,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691063653] [2021-11-07 01:10:57,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:10:57,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:57,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:10:57,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:10:57,952 INFO L87 Difference]: Start difference. First operand 25323 states and 45966 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:01,095 INFO L93 Difference]: Finished difference Result 26132 states and 47327 transitions. [2021-11-07 01:11:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:11:01,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 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 100 [2021-11-07 01:11:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:01,135 INFO L225 Difference]: With dead ends: 26132 [2021-11-07 01:11:01,135 INFO L226 Difference]: Without dead ends: 25470 [2021-11-07 01:11:01,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:11:01,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25470 states. [2021-11-07 01:11:02,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25470 to 25287. [2021-11-07 01:11:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25287 states, 25283 states have (on average 1.814855831981964) internal successors, (45885), 25286 states have internal predecessors, (45885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25287 states to 25287 states and 45885 transitions. [2021-11-07 01:11:02,364 INFO L78 Accepts]: Start accepts. Automaton has 25287 states and 45885 transitions. Word has length 100 [2021-11-07 01:11:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:02,364 INFO L470 AbstractCegarLoop]: Abstraction has 25287 states and 45885 transitions. [2021-11-07 01:11:02,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 25287 states and 45885 transitions. [2021-11-07 01:11:02,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 01:11:02,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:02,388 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:02,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:02,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:02,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:02,804 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:02,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1068813462, now seen corresponding path program 1 times [2021-11-07 01:11:02,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:02,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140461461] [2021-11-07 01:11:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:02,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:02,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:02,806 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:02,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:11:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:03,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:03,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:03,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:04,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:04,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140461461] [2021-11-07 01:11:04,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140461461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:11:04,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1193605646] [2021-11-07 01:11:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:04,176 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:04,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:11:04,176 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:11:04,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:11:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:05,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:11:05,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:05,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:06,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1193605646] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:06,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:11:06,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:11:06,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506745503] [2021-11-07 01:11:06,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:11:06,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:06,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:11:06,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:11:06,419 INFO L87 Difference]: Start difference. First operand 25287 states and 45885 transitions. Second operand has 16 states, 16 states have (on average 9.125) internal successors, (146), 15 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) [2021-11-07 01:11:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:28,520 INFO L93 Difference]: Finished difference Result 54664 states and 98624 transitions. [2021-11-07 01:11:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:11:28,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.125) internal successors, (146), 15 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 100 [2021-11-07 01:11:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:28,605 INFO L225 Difference]: With dead ends: 54664 [2021-11-07 01:11:28,605 INFO L226 Difference]: Without dead ends: 54038 [2021-11-07 01:11:28,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:11:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54038 states. [2021-11-07 01:11:31,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54038 to 50241. [2021-11-07 01:11:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50241 states, 50237 states have (on average 1.8153950275693214) internal successors, (91200), 50240 states have internal predecessors, (91200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:31,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50241 states to 50241 states and 91200 transitions. [2021-11-07 01:11:31,349 INFO L78 Accepts]: Start accepts. Automaton has 50241 states and 91200 transitions. Word has length 100 [2021-11-07 01:11:31,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:31,350 INFO L470 AbstractCegarLoop]: Abstraction has 50241 states and 91200 transitions. [2021-11-07 01:11:31,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.125) internal successors, (146), 15 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) [2021-11-07 01:11:31,350 INFO L276 IsEmpty]: Start isEmpty. Operand 50241 states and 91200 transitions. [2021-11-07 01:11:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 01:11:31,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:31,404 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:31,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:31,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-07 01:11:31,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:31,815 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:31,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:31,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1966206740, now seen corresponding path program 1 times [2021-11-07 01:11:31,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:31,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255600758] [2021-11-07 01:11:31,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:31,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:31,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:31,817 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:31,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:11:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:32,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:32,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:33,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:33,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:33,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255600758] [2021-11-07 01:11:33,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255600758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:11:33,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1724467711] [2021-11-07 01:11:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:33,406 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:33,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:11:33,407 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:11:33,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:11:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:34,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:11:34,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:35,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:35,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1724467711] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:35,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:11:35,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 20 [2021-11-07 01:11:35,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671674656] [2021-11-07 01:11:35,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:11:35,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:11:35,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:11:35,507 INFO L87 Difference]: Start difference. First operand 50241 states and 91200 transitions. Second operand has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 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) [2021-11-07 01:11:44,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:44,187 INFO L93 Difference]: Finished difference Result 60160 states and 107893 transitions. [2021-11-07 01:11:44,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 01:11:44,188 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 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 100 [2021-11-07 01:11:44,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:44,297 INFO L225 Difference]: With dead ends: 60160 [2021-11-07 01:11:44,297 INFO L226 Difference]: Without dead ends: 59160 [2021-11-07 01:11:44,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 01:11:44,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59160 states. [2021-11-07 01:11:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59160 to 50516. [2021-11-07 01:11:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50516 states, 50512 states have (on average 1.813608647450111) internal successors, (91609), 50515 states have internal predecessors, (91609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50516 states to 50516 states and 91609 transitions. [2021-11-07 01:11:46,905 INFO L78 Accepts]: Start accepts. Automaton has 50516 states and 91609 transitions. Word has length 100 [2021-11-07 01:11:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:46,906 INFO L470 AbstractCegarLoop]: Abstraction has 50516 states and 91609 transitions. [2021-11-07 01:11:46,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 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) [2021-11-07 01:11:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 50516 states and 91609 transitions. [2021-11-07 01:11:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 01:11:46,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:46,986 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:47,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:47,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-07 01:11:47,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:47,392 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:47,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1144279620, now seen corresponding path program 1 times [2021-11-07 01:11:47,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:47,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002158180] [2021-11-07 01:11:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:47,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:47,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:47,394 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:47,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:11:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:48,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:48,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:48,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:49,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:49,005 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:49,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002158180] [2021-11-07 01:11:49,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002158180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:11:49,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1179489307] [2021-11-07 01:11:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:49,006 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:49,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:11:49,007 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:11:49,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:11:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:50,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:11:50,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:50,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:51,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1179489307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:51,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:11:51,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5, 5] total 15 [2021-11-07 01:11:51,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647551235] [2021-11-07 01:11:51,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:11:51,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:11:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:11:51,249 INFO L87 Difference]: Start difference. First operand 50516 states and 91609 transitions. Second operand has 9 states, 9 states have (on average 18.666666666666668) 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) [2021-11-07 01:11:55,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:55,538 INFO L93 Difference]: Finished difference Result 50516 states and 91609 transitions. [2021-11-07 01:11:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:11:55,538 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.666666666666668) 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 101 [2021-11-07 01:11:55,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:55,620 INFO L225 Difference]: With dead ends: 50516 [2021-11-07 01:11:55,620 INFO L226 Difference]: Without dead ends: 49488 [2021-11-07 01:11:55,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:11:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49488 states. [2021-11-07 01:11:58,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49488 to 49343. [2021-11-07 01:11:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49343 states, 49342 states have (on average 1.817275343520733) internal successors, (89668), 49342 states have internal predecessors, (89668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49343 states to 49343 states and 89668 transitions. [2021-11-07 01:11:58,224 INFO L78 Accepts]: Start accepts. Automaton has 49343 states and 89668 transitions. Word has length 101 [2021-11-07 01:11:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:58,225 INFO L470 AbstractCegarLoop]: Abstraction has 49343 states and 89668 transitions. [2021-11-07 01:11:58,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.666666666666668) 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) [2021-11-07 01:11:58,225 INFO L276 IsEmpty]: Start isEmpty. Operand 49343 states and 89668 transitions. [2021-11-07 01:11:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:11:58,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:58,280 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:58,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:58,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:58,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:58,694 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:58,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:58,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1075086174, now seen corresponding path program 1 times [2021-11-07 01:11:58,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:58,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787180399] [2021-11-07 01:11:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:58,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:58,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:58,697 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:58,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:12:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:00,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:00,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:00,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:00,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:00,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787180399] [2021-11-07 01:12:00,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787180399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:00,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2121964341] [2021-11-07 01:12:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:00,781 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:12:00,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:12:00,781 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:12:00,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:12:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:02,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:12:02,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:12:02,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:12:03,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2121964341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:03,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:12:03,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:12:03,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012848685] [2021-11-07 01:12:03,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:12:03,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:03,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:12:03,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:12:03,103 INFO L87 Difference]: Start difference. First operand 49343 states and 89668 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:07,870 INFO L93 Difference]: Finished difference Result 98737 states and 179384 transitions. [2021-11-07 01:12:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:12:07,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 104 [2021-11-07 01:12:07,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:08,043 INFO L225 Difference]: With dead ends: 98737 [2021-11-07 01:12:08,043 INFO L226 Difference]: Without dead ends: 98269 [2021-11-07 01:12:08,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:12:08,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98269 states. [2021-11-07 01:12:13,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98269 to 97801. [2021-11-07 01:12:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97801 states, 97800 states have (on average 1.8184662576687116) internal successors, (177846), 97800 states have internal predecessors, (177846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97801 states to 97801 states and 177846 transitions. [2021-11-07 01:12:14,065 INFO L78 Accepts]: Start accepts. Automaton has 97801 states and 177846 transitions. Word has length 104 [2021-11-07 01:12:14,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:14,065 INFO L470 AbstractCegarLoop]: Abstraction has 97801 states and 177846 transitions. [2021-11-07 01:12:14,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 97801 states and 177846 transitions. [2021-11-07 01:12:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:12:14,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:14,151 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:14,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:14,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-07 01:12:14,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:14,556 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:12:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:14,556 INFO L85 PathProgramCache]: Analyzing trace with hash 824454971, now seen corresponding path program 1 times [2021-11-07 01:12:14,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:14,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71574725] [2021-11-07 01:12:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:14,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:14,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:14,559 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:14,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:12:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:15,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:15,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:16,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:16,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:16,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71574725] [2021-11-07 01:12:16,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71574725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:16,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260191767] [2021-11-07 01:12:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:16,448 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:12:16,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:12:16,449 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:12:16,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e57c29-891e-460f-ade6-066db354fdc5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 01:12:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:18,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:12:18,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:12:18,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:12:19,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260191767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:19,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:12:19,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:12:19,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622031255] [2021-11-07 01:12:19,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:12:19,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:12:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:12:19,233 INFO L87 Difference]: Start difference. First operand 97801 states and 177846 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:25,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:25,978 INFO L93 Difference]: Finished difference Result 98261 states and 178599 transitions. [2021-11-07 01:12:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:12:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 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 105 [2021-11-07 01:12:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:26,165 INFO L225 Difference]: With dead ends: 98261 [2021-11-07 01:12:26,165 INFO L226 Difference]: Without dead ends: 97761 [2021-11-07 01:12:26,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:12:26,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97761 states.