./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs --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 b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:30:42,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:30:42,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:30:42,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:30:42,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:30:42,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:30:42,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:30:42,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:30:42,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:30:42,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:30:42,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:30:42,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:30:42,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:30:42,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:30:42,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:30:42,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:30:42,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:30:42,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:30:42,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:30:42,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:30:42,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:30:42,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:30:42,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:30:42,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:30:42,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:30:42,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:30:42,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:30:42,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:30:42,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:30:42,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:30:42,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:30:42,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:30:42,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:30:42,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:30:42,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:30:42,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:30:42,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:30:42,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:30:42,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:30:42,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:30:42,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:30:42,671 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:30:42,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:30:42,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:30:42,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:30:42,740 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:30:42,740 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:30:42,741 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:30:42,741 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:30:42,741 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:30:42,741 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:30:42,742 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:30:42,743 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:30:42,744 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:30:42,744 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:30:42,744 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:30:42,745 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:30:42,745 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:30:42,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:30:42,746 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:30:42,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:30:42,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:30:42,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:30:42,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:30:42,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:30:42,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:30:42,749 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:30:42,749 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:30:42,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:30:42,750 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:30:42,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:30:42,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:30:42,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:30:42,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:30:42,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:30:42,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:30:42,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:30:42,752 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:30:42,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:30:42,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:30:42,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:30:42,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:30:42,754 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_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2021-11-19 13:30:43,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:30:43,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:30:43,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:30:43,213 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:30:43,214 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:30:43,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-19 13:30:43,311 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/data/a7c271293/907a8e2f86ee44799ae6d7b0d09d74f2/FLAG445f2a6a5 [2021-11-19 13:30:44,141 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:30:44,147 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-19 13:30:44,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/data/a7c271293/907a8e2f86ee44799ae6d7b0d09d74f2/FLAG445f2a6a5 [2021-11-19 13:30:44,306 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/data/a7c271293/907a8e2f86ee44799ae6d7b0d09d74f2 [2021-11-19 13:30:44,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:30:44,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:30:44,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:30:44,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:30:44,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:30:44,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:30:44" (1/1) ... [2021-11-19 13:30:44,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e321a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:44, skipping insertion in model container [2021-11-19 13:30:44,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:30:44" (1/1) ... [2021-11-19 13:30:44,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:30:44,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:30:45,199 WARN L230 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_013783d2-695b-4317-8180-90612b338390/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-19 13:30:45,215 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:30:45,239 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) [2021-11-19 13:30:45,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@321f8837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:45, skipping insertion in model container [2021-11-19 13:30:45,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:30:45,241 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:30:45,244 INFO L158 Benchmark]: Toolchain (without parser) took 931.29ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 52.3MB in the beginning and 78.3MB in the end (delta: -26.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-19 13:30:45,246 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 90.2MB. Free memory was 60.3MB in the beginning and 60.3MB in the end (delta: 21.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:30:45,249 INFO L158 Benchmark]: CACSL2BoogieTranslator took 925.24ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 52.1MB in the beginning and 78.3MB in the end (delta: -26.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 13:30:45,253 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 90.2MB. Free memory was 60.3MB in the beginning and 60.3MB in the end (delta: 21.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 925.24ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 52.1MB in the beginning and 78.3MB in the end (delta: -26.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1963]: 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_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs --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 b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:30:48,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:30:48,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:30:48,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:30:48,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:30:48,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:30:48,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:30:48,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:30:48,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:30:48,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:30:48,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:30:48,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:30:48,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:30:48,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:30:48,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:30:48,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:30:48,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:30:48,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:30:48,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:30:48,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:30:48,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:30:48,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:30:48,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:30:48,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:30:48,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:30:48,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:30:48,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:30:48,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:30:48,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:30:48,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:30:48,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:30:48,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:30:48,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:30:48,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:30:48,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:30:48,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:30:48,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:30:48,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:30:48,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:30:48,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:30:48,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:30:48,294 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:30:48,326 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:30:48,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:30:48,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:30:48,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:30:48,328 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:30:48,328 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:30:48,329 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:30:48,329 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:30:48,329 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:30:48,329 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:30:48,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:30:48,331 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:30:48,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:30:48,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:30:48,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:30:48,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:30:48,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:30:48,332 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:30:48,332 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:30:48,333 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:30:48,333 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:30:48,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:30:48,333 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:30:48,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:30:48,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:30:48,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:30:48,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:30:48,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:30:48,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:30:48,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:30:48,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:30:48,336 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:30:48,336 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:48,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:30:48,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:30:48,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:30:48,337 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_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2021-11-19 13:30:48,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:30:48,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:30:48,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:30:48,899 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:30:48,915 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:30:48,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-19 13:30:49,016 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/data/ee4b55658/b55c852bc94d435989b6f644d125bbd1/FLAGd0cdede03 [2021-11-19 13:30:49,983 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:30:49,983 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-19 13:30:50,013 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/data/ee4b55658/b55c852bc94d435989b6f644d125bbd1/FLAGd0cdede03 [2021-11-19 13:30:50,077 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/data/ee4b55658/b55c852bc94d435989b6f644d125bbd1 [2021-11-19 13:30:50,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:30:50,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:30:50,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:30:50,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:30:50,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:30:50,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:30:50" (1/1) ... [2021-11-19 13:30:50,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d4a1674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:50, skipping insertion in model container [2021-11-19 13:30:50,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:30:50" (1/1) ... [2021-11-19 13:30:50,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:30:50,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:30:50,933 WARN L230 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_013783d2-695b-4317-8180-90612b338390/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-19 13:30:50,962 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:30:50,992 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:30:51,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:30:51,183 WARN L230 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_013783d2-695b-4317-8180-90612b338390/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-19 13:30:51,191 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:30:51,210 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:30:51,394 WARN L230 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_013783d2-695b-4317-8180-90612b338390/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-19 13:30:51,402 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:30:51,450 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:30:51,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:51 WrapperNode [2021-11-19 13:30:51,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:30:51,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:30:51,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:30:51,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:30:51,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:51" (1/1) ... [2021-11-19 13:30:51,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:51" (1/1) ... [2021-11-19 13:30:51,608 INFO L137 Inliner]: procedures = 94, calls = 340, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 801 [2021-11-19 13:30:51,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:30:51,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:30:51,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:30:51,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:30:51,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:51" (1/1) ... [2021-11-19 13:30:51,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:51" (1/1) ... [2021-11-19 13:30:51,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:51" (1/1) ... [2021-11-19 13:30:51,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:51" (1/1) ... [2021-11-19 13:30:51,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:51" (1/1) ... [2021-11-19 13:30:51,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:51" (1/1) ... [2021-11-19 13:30:51,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:51" (1/1) ... [2021-11-19 13:30:51,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:30:51,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:30:51,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:30:51,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:30:51,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:51" (1/1) ... [2021-11-19 13:30:51,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:30:51,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:30:51,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:30:51,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:30:51,907 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 13:30:51,908 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 13:30:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:30:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:30:51,909 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:30:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 13:30:51,909 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 13:30:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:30:51,910 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:30:51,910 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:30:51,910 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:30:51,910 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:30:51,910 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:30:51,910 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:30:51,911 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:30:51,911 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:30:51,911 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:30:51,911 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 13:30:51,911 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 13:30:51,911 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:30:51,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:30:51,912 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:30:51,912 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:30:51,912 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:30:51,912 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:30:51,913 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:30:51,913 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:30:51,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:30:51,913 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 13:30:51,913 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 13:30:51,914 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:30:51,914 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:30:51,914 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:30:51,915 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:30:51,915 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:30:51,915 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:30:51,916 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:30:51,916 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:30:51,916 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:30:51,916 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:30:51,916 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 13:30:51,917 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 13:30:51,917 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:30:51,917 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:30:51,917 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:30:51,918 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:30:51,918 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:30:51,918 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:30:51,919 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 13:30:51,920 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 13:30:51,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:30:51,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:30:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:30:51,922 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:30:52,152 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:30:52,155 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:30:53,797 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:30:53,812 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:30:53,813 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:30:53,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:30:53 BoogieIcfgContainer [2021-11-19 13:30:53,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:30:53,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:30:53,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:30:53,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:30:53,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:30:50" (1/3) ... [2021-11-19 13:30:53,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f1379e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:30:53, skipping insertion in model container [2021-11-19 13:30:53,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:51" (2/3) ... [2021-11-19 13:30:53,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f1379e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:30:53, skipping insertion in model container [2021-11-19 13:30:53,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:30:53" (3/3) ... [2021-11-19 13:30:53,828 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2021-11-19 13:30:53,835 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:30:53,835 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:30:53,945 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:30:53,954 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 [2021-11-19 13:30:53,955 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:30:54,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 570 states, 445 states have (on average 1.6898876404494383) internal successors, (752), 466 states have internal predecessors, (752), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 13:30:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 13:30:54,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:54,049 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:54,050 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash 679987401, now seen corresponding path program 1 times [2021-11-19 13:30:54,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:54,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879621909] [2021-11-19 13:30:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:54,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:54,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:54,082 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:54,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:30:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:54,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:30:54,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 13:30:55,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 13:30:55,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:55,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879621909] [2021-11-19 13:30:55,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879621909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:55,679 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:55,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:30:55,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096215464] [2021-11-19 13:30:55,683 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:55,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:30:55,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:55,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:30:55,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:30:55,728 INFO L87 Difference]: Start difference. First operand has 570 states, 445 states have (on average 1.6898876404494383) internal successors, (752), 466 states have internal predecessors, (752), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:30:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:55,834 INFO L93 Difference]: Finished difference Result 591 states and 978 transitions. [2021-11-19 13:30:55,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:30:55,838 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 111 [2021-11-19 13:30:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:55,868 INFO L225 Difference]: With dead ends: 591 [2021-11-19 13:30:55,869 INFO L226 Difference]: Without dead ends: 562 [2021-11-19 13:30:55,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:30:55,879 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:55,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:30:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-19 13:30:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-19 13:30:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 439 states have (on average 1.6879271070615034) internal successors, (741), 458 states have internal predecessors, (741), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:30:56,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 932 transitions. [2021-11-19 13:30:56,066 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 932 transitions. Word has length 111 [2021-11-19 13:30:56,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:56,070 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 932 transitions. [2021-11-19 13:30:56,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:30:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 932 transitions. [2021-11-19 13:30:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 13:30:56,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:56,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:56,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:56,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:56,312 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:56,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:56,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2144316280, now seen corresponding path program 1 times [2021-11-19 13:30:56,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:56,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411866768] [2021-11-19 13:30:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:56,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:56,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:56,317 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:56,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:30:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:56,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:30:56,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:30:57,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:30:57,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:57,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411866768] [2021-11-19 13:30:57,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411866768] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:57,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:30:57,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:30:57,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778320083] [2021-11-19 13:30:57,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:57,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:30:57,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:57,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:30:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:30:57,783 INFO L87 Difference]: Start difference. First operand 562 states and 932 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:30:57,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:57,982 INFO L93 Difference]: Finished difference Result 1115 states and 1856 transitions. [2021-11-19 13:30:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:30:57,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 113 [2021-11-19 13:30:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:57,991 INFO L225 Difference]: With dead ends: 1115 [2021-11-19 13:30:57,991 INFO L226 Difference]: Without dead ends: 562 [2021-11-19 13:30:58,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:30:58,024 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 14 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:58,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2747 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:30:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-19 13:30:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-19 13:30:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 439 states have (on average 1.6856492027334853) internal successors, (740), 458 states have internal predecessors, (740), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:30:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 931 transitions. [2021-11-19 13:30:58,100 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 931 transitions. Word has length 113 [2021-11-19 13:30:58,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:58,101 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 931 transitions. [2021-11-19 13:30:58,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:30:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 931 transitions. [2021-11-19 13:30:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 13:30:58,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:58,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:58,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:58,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:58,323 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:58,324 INFO L85 PathProgramCache]: Analyzing trace with hash 219685296, now seen corresponding path program 1 times [2021-11-19 13:30:58,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:58,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244860302] [2021-11-19 13:30:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:58,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:58,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:58,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:58,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:30:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:58,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:30:58,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:30:59,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:30:59,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:59,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244860302] [2021-11-19 13:30:59,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244860302] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:59,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:30:59,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:30:59,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983343825] [2021-11-19 13:30:59,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:59,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:30:59,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:59,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:30:59,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:30:59,690 INFO L87 Difference]: Start difference. First operand 562 states and 931 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:30:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:59,867 INFO L93 Difference]: Finished difference Result 1115 states and 1854 transitions. [2021-11-19 13:30:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:30:59,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 115 [2021-11-19 13:30:59,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:59,879 INFO L225 Difference]: With dead ends: 1115 [2021-11-19 13:30:59,879 INFO L226 Difference]: Without dead ends: 562 [2021-11-19 13:30:59,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:30:59,885 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 12 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:59,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2747 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:59,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-19 13:30:59,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-19 13:30:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 439 states have (on average 1.683371298405467) internal successors, (739), 458 states have internal predecessors, (739), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:30:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 930 transitions. [2021-11-19 13:30:59,946 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 930 transitions. Word has length 115 [2021-11-19 13:30:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:59,947 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 930 transitions. [2021-11-19 13:30:59,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:30:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 930 transitions. [2021-11-19 13:30:59,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 13:30:59,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:59,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:00,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:00,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:00,191 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:00,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1262716040, now seen corresponding path program 1 times [2021-11-19 13:31:00,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:00,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671459438] [2021-11-19 13:31:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:00,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:00,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:00,198 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:00,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:31:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:00,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:31:00,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:31:01,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:31:01,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:01,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671459438] [2021-11-19 13:31:01,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671459438] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:01,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:31:01,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:31:01,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793893852] [2021-11-19 13:31:01,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:01,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:31:01,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:01,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:31:01,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:31:01,432 INFO L87 Difference]: Start difference. First operand 562 states and 930 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:01,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:01,562 INFO L93 Difference]: Finished difference Result 1119 states and 1857 transitions. [2021-11-19 13:31:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:31:01,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-11-19 13:31:01,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:01,571 INFO L225 Difference]: With dead ends: 1119 [2021-11-19 13:31:01,572 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 13:31:01,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:31:01,578 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 13 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:01,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2747 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:31:01,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 13:31:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-19 13:31:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6756756756756757) internal successors, (744), 463 states have internal predecessors, (744), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:01,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 935 transitions. [2021-11-19 13:31:01,629 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 935 transitions. Word has length 117 [2021-11-19 13:31:01,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:01,630 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 935 transitions. [2021-11-19 13:31:01,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 935 transitions. [2021-11-19 13:31:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 13:31:01,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:01,639 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:01,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:01,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:01,863 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:01,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash 559297322, now seen corresponding path program 1 times [2021-11-19 13:31:01,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:01,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380855809] [2021-11-19 13:31:01,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:01,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:01,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:01,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:01,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:31:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:02,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:31:02,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:31:02,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:31:03,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:03,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380855809] [2021-11-19 13:31:03,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380855809] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:03,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:31:03,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:31:03,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589150922] [2021-11-19 13:31:03,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:03,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:31:03,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:03,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:31:03,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:31:03,099 INFO L87 Difference]: Start difference. First operand 568 states and 935 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:03,201 INFO L93 Difference]: Finished difference Result 1118 states and 1848 transitions. [2021-11-19 13:31:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:31:03,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2021-11-19 13:31:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:03,212 INFO L225 Difference]: With dead ends: 1118 [2021-11-19 13:31:03,213 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 13:31:03,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:31:03,223 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 8 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:03,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2748 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:31:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 13:31:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-19 13:31:03,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6734234234234233) internal successors, (743), 463 states have internal predecessors, (743), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:03,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 934 transitions. [2021-11-19 13:31:03,285 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 934 transitions. Word has length 118 [2021-11-19 13:31:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:03,286 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 934 transitions. [2021-11-19 13:31:03,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:03,287 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 934 transitions. [2021-11-19 13:31:03,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 13:31:03,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:03,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:03,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:03,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:03,523 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:03,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:03,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1435315900, now seen corresponding path program 1 times [2021-11-19 13:31:03,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:03,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191503822] [2021-11-19 13:31:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:03,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:03,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:03,527 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:03,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:31:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:04,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:31:04,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:31:04,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:31:04,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:04,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191503822] [2021-11-19 13:31:04,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191503822] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:04,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:31:04,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:31:04,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885619004] [2021-11-19 13:31:04,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:04,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:31:04,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:04,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:31:04,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:31:04,825 INFO L87 Difference]: Start difference. First operand 568 states and 934 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:04,914 INFO L93 Difference]: Finished difference Result 1118 states and 1847 transitions. [2021-11-19 13:31:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:31:04,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 119 [2021-11-19 13:31:04,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:04,922 INFO L225 Difference]: With dead ends: 1118 [2021-11-19 13:31:04,922 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 13:31:04,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:31:04,928 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 6 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:04,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2748 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:31:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 13:31:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-19 13:31:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6711711711711712) internal successors, (742), 463 states have internal predecessors, (742), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 933 transitions. [2021-11-19 13:31:04,964 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 933 transitions. Word has length 119 [2021-11-19 13:31:04,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:04,965 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 933 transitions. [2021-11-19 13:31:04,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 933 transitions. [2021-11-19 13:31:04,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 13:31:04,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:04,972 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:05,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:05,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:05,190 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:05,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:05,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1244700050, now seen corresponding path program 1 times [2021-11-19 13:31:05,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:05,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202818526] [2021-11-19 13:31:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:05,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:05,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:05,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:05,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:31:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:05,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:31:05,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:31:06,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:06,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:06,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202818526] [2021-11-19 13:31:06,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202818526] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:06,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:31:06,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 13:31:06,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756864105] [2021-11-19 13:31:06,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:06,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:31:06,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:06,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:31:06,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:31:06,622 INFO L87 Difference]: Start difference. First operand 568 states and 933 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:31:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:06,930 INFO L93 Difference]: Finished difference Result 1135 states and 1875 transitions. [2021-11-19 13:31:06,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:31:06,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 120 [2021-11-19 13:31:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:06,941 INFO L225 Difference]: With dead ends: 1135 [2021-11-19 13:31:06,941 INFO L226 Difference]: Without dead ends: 589 [2021-11-19 13:31:06,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:31:06,947 INFO L933 BasicCegarLoop]: 917 mSDtfsCounter, 148 mSDsluCounter, 4478 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5395 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:06,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5395 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:31:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-19 13:31:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 587. [2021-11-19 13:31:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 460 states have (on average 1.6695652173913043) internal successors, (768), 481 states have internal predecessors, (768), 99 states have call successors, (99), 26 states have call predecessors, (99), 27 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-11-19 13:31:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 964 transitions. [2021-11-19 13:31:06,991 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 964 transitions. Word has length 120 [2021-11-19 13:31:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:06,992 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 964 transitions. [2021-11-19 13:31:06,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:31:06,992 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 964 transitions. [2021-11-19 13:31:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 13:31:06,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:06,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:07,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:07,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:07,215 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash -113913425, now seen corresponding path program 1 times [2021-11-19 13:31:07,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:07,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654775916] [2021-11-19 13:31:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:07,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:07,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:07,219 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:07,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:31:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:07,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:31:07,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:31:08,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:31:08,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:08,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654775916] [2021-11-19 13:31:08,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654775916] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:08,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:31:08,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 13:31:08,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100097556] [2021-11-19 13:31:08,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:08,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:31:08,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:08,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:31:08,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:31:08,577 INFO L87 Difference]: Start difference. First operand 587 states and 964 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:08,672 INFO L93 Difference]: Finished difference Result 1148 states and 1897 transitions. [2021-11-19 13:31:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:31:08,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-19 13:31:08,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:08,680 INFO L225 Difference]: With dead ends: 1148 [2021-11-19 13:31:08,680 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 13:31:08,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:31:08,686 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 8 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:08,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2747 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:31:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 13:31:08,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-19 13:31:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 458 states have (on average 1.6703056768558953) internal successors, (765), 478 states have internal predecessors, (765), 98 states have call successors, (98), 26 states have call predecessors, (98), 26 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2021-11-19 13:31:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 957 transitions. [2021-11-19 13:31:08,722 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 957 transitions. Word has length 120 [2021-11-19 13:31:08,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:08,723 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 957 transitions. [2021-11-19 13:31:08,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:08,724 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 957 transitions. [2021-11-19 13:31:08,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 13:31:08,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:08,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:08,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:08,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:08,947 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:08,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:08,947 INFO L85 PathProgramCache]: Analyzing trace with hash 993576915, now seen corresponding path program 1 times [2021-11-19 13:31:08,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:08,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138760940] [2021-11-19 13:31:08,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:08,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:08,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:08,951 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:08,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:31:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:09,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:31:09,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:31:09,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:31:10,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:10,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138760940] [2021-11-19 13:31:10,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138760940] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:10,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:31:10,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:31:10,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520202385] [2021-11-19 13:31:10,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:10,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:31:10,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:10,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:31:10,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:31:10,220 INFO L87 Difference]: Start difference. First operand 583 states and 957 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:10,469 INFO L93 Difference]: Finished difference Result 1174 states and 1942 transitions. [2021-11-19 13:31:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:31:10,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 121 [2021-11-19 13:31:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:10,478 INFO L225 Difference]: With dead ends: 1174 [2021-11-19 13:31:10,478 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 13:31:10,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:31:10,484 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 134 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:10,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2555 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:31:10,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 13:31:10,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-19 13:31:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 458 states have (on average 1.6593886462882097) internal successors, (760), 478 states have internal predecessors, (760), 98 states have call successors, (98), 26 states have call predecessors, (98), 26 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2021-11-19 13:31:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 952 transitions. [2021-11-19 13:31:10,560 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 952 transitions. Word has length 121 [2021-11-19 13:31:10,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:10,560 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 952 transitions. [2021-11-19 13:31:10,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 952 transitions. [2021-11-19 13:31:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 13:31:10,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:10,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:10,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:10,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:10,778 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:10,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash 840520301, now seen corresponding path program 1 times [2021-11-19 13:31:10,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:10,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197555724] [2021-11-19 13:31:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:10,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:10,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:10,782 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:10,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:31:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:11,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:31:11,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:31:11,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:31:11,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:11,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197555724] [2021-11-19 13:31:11,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197555724] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:11,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:31:11,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:31:11,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551971475] [2021-11-19 13:31:11,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:11,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:31:11,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:11,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:31:11,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:31:11,997 INFO L87 Difference]: Start difference. First operand 583 states and 952 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:12,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:12,232 INFO L93 Difference]: Finished difference Result 1174 states and 1932 transitions. [2021-11-19 13:31:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:31:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 123 [2021-11-19 13:31:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:12,242 INFO L225 Difference]: With dead ends: 1174 [2021-11-19 13:31:12,242 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 13:31:12,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:31:12,248 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 128 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:12,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2555 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:31:12,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 13:31:12,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-19 13:31:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 458 states have (on average 1.648471615720524) internal successors, (755), 478 states have internal predecessors, (755), 98 states have call successors, (98), 26 states have call predecessors, (98), 26 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2021-11-19 13:31:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 947 transitions. [2021-11-19 13:31:12,281 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 947 transitions. Word has length 123 [2021-11-19 13:31:12,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:12,282 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 947 transitions. [2021-11-19 13:31:12,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:12,283 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 947 transitions. [2021-11-19 13:31:12,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 13:31:12,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:12,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:12,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:12,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:12,503 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:12,503 INFO L85 PathProgramCache]: Analyzing trace with hash 936712371, now seen corresponding path program 1 times [2021-11-19 13:31:12,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:12,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648609762] [2021-11-19 13:31:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:12,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:12,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:12,506 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:12,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:31:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:13,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:31:13,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:31:13,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:31:13,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:13,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648609762] [2021-11-19 13:31:13,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648609762] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:13,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:31:13,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:31:13,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389924115] [2021-11-19 13:31:13,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:13,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:31:13,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:13,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:31:13,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:31:13,806 INFO L87 Difference]: Start difference. First operand 583 states and 947 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:14,044 INFO L93 Difference]: Finished difference Result 1195 states and 1953 transitions. [2021-11-19 13:31:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:31:14,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-11-19 13:31:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:14,054 INFO L225 Difference]: With dead ends: 1195 [2021-11-19 13:31:14,054 INFO L226 Difference]: Without dead ends: 613 [2021-11-19 13:31:14,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:31:14,060 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 143 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2565 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:14,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2565 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:31:14,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-11-19 13:31:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 598. [2021-11-19 13:31:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 473 states have (on average 1.627906976744186) internal successors, (770), 492 states have internal predecessors, (770), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 961 transitions. [2021-11-19 13:31:14,097 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 961 transitions. Word has length 125 [2021-11-19 13:31:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:14,099 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 961 transitions. [2021-11-19 13:31:14,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 961 transitions. [2021-11-19 13:31:14,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 13:31:14,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:14,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:14,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:14,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:14,331 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:14,332 INFO L85 PathProgramCache]: Analyzing trace with hash -734352333, now seen corresponding path program 1 times [2021-11-19 13:31:14,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:14,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42204087] [2021-11-19 13:31:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:14,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:14,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:14,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:14,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:31:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:14,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:31:14,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:31:15,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:15,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:15,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42204087] [2021-11-19 13:31:15,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42204087] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:15,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:31:15,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 13:31:15,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898370948] [2021-11-19 13:31:15,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:15,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:31:15,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:15,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:31:15,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:31:15,631 INFO L87 Difference]: Start difference. First operand 598 states and 961 transitions. Second operand has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:31:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:15,848 INFO L93 Difference]: Finished difference Result 1159 states and 1874 transitions. [2021-11-19 13:31:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:31:15,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 125 [2021-11-19 13:31:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:15,858 INFO L225 Difference]: With dead ends: 1159 [2021-11-19 13:31:15,858 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 13:31:15,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:31:15,864 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 131 mSDsluCounter, 4443 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5363 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:15,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5363 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:31:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 13:31:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 577. [2021-11-19 13:31:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 452 states have (on average 1.6216814159292035) internal successors, (733), 471 states have internal predecessors, (733), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 924 transitions. [2021-11-19 13:31:15,900 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 924 transitions. Word has length 125 [2021-11-19 13:31:15,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:15,900 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 924 transitions. [2021-11-19 13:31:15,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:31:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 924 transitions. [2021-11-19 13:31:15,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 13:31:15,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:15,907 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:15,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:16,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:16,131 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:16,131 INFO L85 PathProgramCache]: Analyzing trace with hash 766165643, now seen corresponding path program 1 times [2021-11-19 13:31:16,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:16,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860832460] [2021-11-19 13:31:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:16,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:16,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:16,134 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:16,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:31:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:16,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:31:16,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:31:16,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:31:17,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:17,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860832460] [2021-11-19 13:31:17,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860832460] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:17,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:31:17,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:31:17,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595295982] [2021-11-19 13:31:17,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:17,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:31:17,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:17,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:31:17,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:31:17,296 INFO L87 Difference]: Start difference. First operand 577 states and 924 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:17,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:17,448 INFO L93 Difference]: Finished difference Result 1123 states and 1812 transitions. [2021-11-19 13:31:17,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:31:17,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 126 [2021-11-19 13:31:17,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:17,457 INFO L225 Difference]: With dead ends: 1123 [2021-11-19 13:31:17,457 INFO L226 Difference]: Without dead ends: 577 [2021-11-19 13:31:17,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:31:17,463 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 69 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:17,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2579 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:31:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-19 13:31:17,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-19 13:31:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 452 states have (on average 1.6194690265486726) internal successors, (732), 471 states have internal predecessors, (732), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 923 transitions. [2021-11-19 13:31:17,498 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 923 transitions. Word has length 126 [2021-11-19 13:31:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:17,499 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 923 transitions. [2021-11-19 13:31:17,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:17,499 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 923 transitions. [2021-11-19 13:31:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 13:31:17,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:17,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:17,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:17,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:17,719 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:17,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:17,719 INFO L85 PathProgramCache]: Analyzing trace with hash -696856498, now seen corresponding path program 1 times [2021-11-19 13:31:17,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:17,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732198172] [2021-11-19 13:31:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:17,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:17,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:17,722 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:17,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:31:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:18,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:31:18,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:31:18,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:31:18,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:18,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732198172] [2021-11-19 13:31:18,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732198172] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:18,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:31:18,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:31:18,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70690085] [2021-11-19 13:31:18,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:18,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:31:18,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:31:18,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:31:18,918 INFO L87 Difference]: Start difference. First operand 577 states and 923 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:19,058 INFO L93 Difference]: Finished difference Result 1123 states and 1811 transitions. [2021-11-19 13:31:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:31:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 127 [2021-11-19 13:31:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:19,067 INFO L225 Difference]: With dead ends: 1123 [2021-11-19 13:31:19,067 INFO L226 Difference]: Without dead ends: 577 [2021-11-19 13:31:19,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:31:19,073 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 67 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:19,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2579 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:31:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-19 13:31:19,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-19 13:31:19,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 452 states have (on average 1.6172566371681416) internal successors, (731), 471 states have internal predecessors, (731), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 922 transitions. [2021-11-19 13:31:19,104 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 922 transitions. Word has length 127 [2021-11-19 13:31:19,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:19,105 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 922 transitions. [2021-11-19 13:31:19,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:31:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 922 transitions. [2021-11-19 13:31:19,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 13:31:19,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:19,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:19,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-19 13:31:19,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:19,337 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:19,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash 723056518, now seen corresponding path program 1 times [2021-11-19 13:31:19,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:19,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682800394] [2021-11-19 13:31:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:19,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:19,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:19,340 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:19,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:31:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:19,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:31:19,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:31:20,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:20,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:20,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682800394] [2021-11-19 13:31:20,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682800394] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:20,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:31:20,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:31:20,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226752448] [2021-11-19 13:31:20,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:20,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:31:20,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:20,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:31:20,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:31:20,941 INFO L87 Difference]: Start difference. First operand 577 states and 922 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:31:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:21,272 INFO L93 Difference]: Finished difference Result 1128 states and 1818 transitions. [2021-11-19 13:31:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:31:21,274 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 128 [2021-11-19 13:31:21,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:21,281 INFO L225 Difference]: With dead ends: 1128 [2021-11-19 13:31:21,281 INFO L226 Difference]: Without dead ends: 588 [2021-11-19 13:31:21,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:31:21,288 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 109 mSDsluCounter, 5120 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5984 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:21,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5984 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:31:21,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-11-19 13:31:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 579. [2021-11-19 13:31:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 454 states have (on average 1.6123348017621146) internal successors, (732), 473 states have internal predecessors, (732), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 923 transitions. [2021-11-19 13:31:21,320 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 923 transitions. Word has length 128 [2021-11-19 13:31:21,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:21,321 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 923 transitions. [2021-11-19 13:31:21,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:31:21,322 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 923 transitions. [2021-11-19 13:31:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 13:31:21,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:21,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:21,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:21,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:21,555 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash -123509479, now seen corresponding path program 1 times [2021-11-19 13:31:21,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:21,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403712574] [2021-11-19 13:31:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:21,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:21,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:21,558 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:21,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:31:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:22,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:31:22,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:31:22,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:22,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:22,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403712574] [2021-11-19 13:31:22,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403712574] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:31:22,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:31:22,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:31:22,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43795936] [2021-11-19 13:31:22,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:22,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:31:22,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:22,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:31:22,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:31:22,989 INFO L87 Difference]: Start difference. First operand 579 states and 923 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:31:23,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:23,266 INFO L93 Difference]: Finished difference Result 1120 states and 1799 transitions. [2021-11-19 13:31:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:31:23,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 129 [2021-11-19 13:31:23,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:23,275 INFO L225 Difference]: With dead ends: 1120 [2021-11-19 13:31:23,275 INFO L226 Difference]: Without dead ends: 584 [2021-11-19 13:31:23,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:31:23,280 INFO L933 BasicCegarLoop]: 866 mSDtfsCounter, 77 mSDsluCounter, 5126 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5992 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:23,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5992 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:31:23,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-11-19 13:31:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 581. [2021-11-19 13:31:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 456 states have (on average 1.6074561403508771) internal successors, (733), 475 states have internal predecessors, (733), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 924 transitions. [2021-11-19 13:31:23,309 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 924 transitions. Word has length 129 [2021-11-19 13:31:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:23,310 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 924 transitions. [2021-11-19 13:31:23,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:31:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 924 transitions. [2021-11-19 13:31:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 13:31:23,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:23,316 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:23,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:23,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:23,543 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:23,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:23,543 INFO L85 PathProgramCache]: Analyzing trace with hash -549707088, now seen corresponding path program 1 times [2021-11-19 13:31:23,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:23,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46350425] [2021-11-19 13:31:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:23,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:23,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:23,545 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:23,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:31:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:24,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:31:24,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:24,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:24,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:24,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46350425] [2021-11-19 13:31:24,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46350425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:24,811 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:24,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:31:24,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806160423] [2021-11-19 13:31:24,812 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:24,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:31:24,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:24,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:31:24,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:31:24,814 INFO L87 Difference]: Start difference. First operand 581 states and 924 transitions. Second operand has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:31:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:25,040 INFO L93 Difference]: Finished difference Result 1066 states and 1726 transitions. [2021-11-19 13:31:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:31:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 130 [2021-11-19 13:31:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:25,049 INFO L225 Difference]: With dead ends: 1066 [2021-11-19 13:31:25,049 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 13:31:25,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:31:25,055 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 55 mSDsluCounter, 5199 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 6077 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:25,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 6077 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:31:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 13:31:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-19 13:31:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 449 states have (on average 1.6146993318485523) internal successors, (725), 468 states have internal predecessors, (725), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 916 transitions. [2021-11-19 13:31:25,083 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 916 transitions. Word has length 130 [2021-11-19 13:31:25,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:25,084 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 916 transitions. [2021-11-19 13:31:25,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:31:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 916 transitions. [2021-11-19 13:31:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 13:31:25,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:25,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:25,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:25,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:25,311 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:25,311 INFO L85 PathProgramCache]: Analyzing trace with hash -702727405, now seen corresponding path program 1 times [2021-11-19 13:31:25,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:25,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687378652] [2021-11-19 13:31:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:25,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:25,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:25,313 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:25,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:31:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:25,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:31:25,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:26,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:26,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:26,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687378652] [2021-11-19 13:31:26,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687378652] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:26,662 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:26,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:31:26,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027215001] [2021-11-19 13:31:26,663 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:26,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:31:26,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:26,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:31:26,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:31:26,666 INFO L87 Difference]: Start difference. First operand 574 states and 916 transitions. Second operand has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:31:26,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:26,883 INFO L93 Difference]: Finished difference Result 1071 states and 1740 transitions. [2021-11-19 13:31:26,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:31:26,885 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 131 [2021-11-19 13:31:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:26,892 INFO L225 Difference]: With dead ends: 1071 [2021-11-19 13:31:26,892 INFO L226 Difference]: Without dead ends: 571 [2021-11-19 13:31:26,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:31:26,897 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 170 mSDsluCounter, 5200 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 6070 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:26,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 6070 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:31:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-19 13:31:26,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-19 13:31:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 446 states have (on average 1.6143497757847534) internal successors, (720), 465 states have internal predecessors, (720), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 911 transitions. [2021-11-19 13:31:26,925 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 911 transitions. Word has length 131 [2021-11-19 13:31:26,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:26,926 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 911 transitions. [2021-11-19 13:31:26,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:31:26,927 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 911 transitions. [2021-11-19 13:31:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 13:31:26,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:26,932 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:26,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:27,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:27,147 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:27,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1669023853, now seen corresponding path program 1 times [2021-11-19 13:31:27,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:27,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046418733] [2021-11-19 13:31:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:27,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:27,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:27,149 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:27,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:31:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:27,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:31:27,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:27,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:28,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:28,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046418733] [2021-11-19 13:31:28,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046418733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:28,339 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:28,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:31:28,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000784053] [2021-11-19 13:31:28,340 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:28,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:31:28,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:28,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:31:28,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:31:28,342 INFO L87 Difference]: Start difference. First operand 571 states and 911 transitions. Second operand has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-19 13:31:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:28,507 INFO L93 Difference]: Finished difference Result 1068 states and 1735 transitions. [2021-11-19 13:31:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:31:28,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 131 [2021-11-19 13:31:28,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:28,515 INFO L225 Difference]: With dead ends: 1068 [2021-11-19 13:31:28,515 INFO L226 Difference]: Without dead ends: 563 [2021-11-19 13:31:28,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:31:28,520 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 105 mSDsluCounter, 4282 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 5151 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:28,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 5151 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:31:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-19 13:31:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-19 13:31:28,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 438 states have (on average 1.6187214611872147) internal successors, (709), 457 states have internal predecessors, (709), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 900 transitions. [2021-11-19 13:31:28,548 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 900 transitions. Word has length 131 [2021-11-19 13:31:28,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:28,548 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 900 transitions. [2021-11-19 13:31:28,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-19 13:31:28,549 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 900 transitions. [2021-11-19 13:31:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 13:31:28,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:28,555 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:28,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:28,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:28,771 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:28,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:28,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1190417612, now seen corresponding path program 1 times [2021-11-19 13:31:28,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:28,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374317019] [2021-11-19 13:31:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:28,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:28,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:28,774 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:28,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:31:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:29,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:31:29,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:29,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:30,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:30,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374317019] [2021-11-19 13:31:30,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374317019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:30,217 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:30,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:31:30,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587185096] [2021-11-19 13:31:30,217 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:30,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:31:30,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:30,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:31:30,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:31:30,219 INFO L87 Difference]: Start difference. First operand 563 states and 900 transitions. Second operand has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:31:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:30,439 INFO L93 Difference]: Finished difference Result 1054 states and 1713 transitions. [2021-11-19 13:31:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:31:30,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 132 [2021-11-19 13:31:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:30,447 INFO L225 Difference]: With dead ends: 1054 [2021-11-19 13:31:30,447 INFO L226 Difference]: Without dead ends: 563 [2021-11-19 13:31:30,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:31:30,452 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 101 mSDsluCounter, 5978 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6843 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:30,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 6843 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:31:30,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-19 13:31:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-19 13:31:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 438 states have (on average 1.6164383561643836) internal successors, (708), 457 states have internal predecessors, (708), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 899 transitions. [2021-11-19 13:31:30,481 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 899 transitions. Word has length 132 [2021-11-19 13:31:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:30,482 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 899 transitions. [2021-11-19 13:31:30,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:31:30,482 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 899 transitions. [2021-11-19 13:31:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 13:31:30,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:30,488 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:30,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:30,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:30,712 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:30,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:30,713 INFO L85 PathProgramCache]: Analyzing trace with hash 2139488945, now seen corresponding path program 1 times [2021-11-19 13:31:30,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:30,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090799554] [2021-11-19 13:31:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:30,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:30,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:30,715 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:30,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:31:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:31:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:31,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:32,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:32,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090799554] [2021-11-19 13:31:32,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090799554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:32,143 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:32,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:31:32,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368224924] [2021-11-19 13:31:32,143 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:32,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:31:32,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:32,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:31:32,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:31:32,145 INFO L87 Difference]: Start difference. First operand 563 states and 899 transitions. Second operand has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:31:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:32,366 INFO L93 Difference]: Finished difference Result 1098 states and 1770 transitions. [2021-11-19 13:31:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:31:32,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 133 [2021-11-19 13:31:32,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:32,373 INFO L225 Difference]: With dead ends: 1098 [2021-11-19 13:31:32,374 INFO L226 Difference]: Without dead ends: 560 [2021-11-19 13:31:32,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:31:32,378 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 156 mSDsluCounter, 5061 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 5914 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:32,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 5914 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:31:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-19 13:31:32,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2021-11-19 13:31:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 435 states have (on average 1.6091954022988506) internal successors, (700), 454 states have internal predecessors, (700), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 891 transitions. [2021-11-19 13:31:32,408 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 891 transitions. Word has length 133 [2021-11-19 13:31:32,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:32,409 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 891 transitions. [2021-11-19 13:31:32,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:31:32,410 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 891 transitions. [2021-11-19 13:31:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 13:31:32,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:32,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:32,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:32,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:32,640 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash -130999527, now seen corresponding path program 1 times [2021-11-19 13:31:32,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:32,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592955295] [2021-11-19 13:31:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:32,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:32,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:32,643 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:32,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:31:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:33,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:31:33,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:33,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:34,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:34,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592955295] [2021-11-19 13:31:34,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592955295] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:34,117 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:34,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:31:34,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458000763] [2021-11-19 13:31:34,118 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:34,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:31:34,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:34,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:31:34,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:31:34,119 INFO L87 Difference]: Start difference. First operand 560 states and 891 transitions. Second operand has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:31:34,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:34,342 INFO L93 Difference]: Finished difference Result 1045 states and 1693 transitions. [2021-11-19 13:31:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:31:34,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 134 [2021-11-19 13:31:34,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:34,350 INFO L225 Difference]: With dead ends: 1045 [2021-11-19 13:31:34,350 INFO L226 Difference]: Without dead ends: 560 [2021-11-19 13:31:34,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:31:34,357 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 81 mSDsluCounter, 5932 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6786 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:34,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 6786 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:31:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-19 13:31:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2021-11-19 13:31:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 435 states have (on average 1.606896551724138) internal successors, (699), 454 states have internal predecessors, (699), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 890 transitions. [2021-11-19 13:31:34,385 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 890 transitions. Word has length 134 [2021-11-19 13:31:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:34,386 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 890 transitions. [2021-11-19 13:31:34,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:31:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 890 transitions. [2021-11-19 13:31:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 13:31:34,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:34,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:34,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:34,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:34,619 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:34,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:34,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1294149790, now seen corresponding path program 1 times [2021-11-19 13:31:34,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:34,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484239937] [2021-11-19 13:31:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:34,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:34,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:34,622 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:34,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:31:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:35,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:31:35,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:35,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:31:36,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:36,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484239937] [2021-11-19 13:31:36,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484239937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:36,056 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:36,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:31:36,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721446894] [2021-11-19 13:31:36,056 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:36,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:31:36,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:36,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:31:36,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:31:36,058 INFO L87 Difference]: Start difference. First operand 560 states and 890 transitions. Second operand has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:31:36,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:36,309 INFO L93 Difference]: Finished difference Result 1083 states and 1738 transitions. [2021-11-19 13:31:36,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:31:36,311 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 135 [2021-11-19 13:31:36,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:36,317 INFO L225 Difference]: With dead ends: 1083 [2021-11-19 13:31:36,317 INFO L226 Difference]: Without dead ends: 557 [2021-11-19 13:31:36,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:31:36,321 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 132 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 7629 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:36,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 7629 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:31:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-19 13:31:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-19 13:31:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 432 states have (on average 1.599537037037037) internal successors, (691), 451 states have internal predecessors, (691), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:31:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 882 transitions. [2021-11-19 13:31:36,348 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 882 transitions. Word has length 135 [2021-11-19 13:31:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:36,349 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 882 transitions. [2021-11-19 13:31:36,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:31:36,350 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 882 transitions. [2021-11-19 13:31:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 13:31:36,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:36,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:36,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:36,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:36,580 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash 71332286, now seen corresponding path program 1 times [2021-11-19 13:31:36,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:36,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646944758] [2021-11-19 13:31:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:36,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:36,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:36,583 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:36,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:31:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:37,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 13:31:37,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:31:37,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:31:38,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:38,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646944758] [2021-11-19 13:31:38,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646944758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:38,758 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:38,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 13:31:38,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14031583] [2021-11-19 13:31:38,759 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:38,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:31:38,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:38,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:31:38,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:31:38,760 INFO L87 Difference]: Start difference. First operand 557 states and 882 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-19 13:31:44,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:44,138 INFO L93 Difference]: Finished difference Result 1173 states and 1931 transitions. [2021-11-19 13:31:44,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:31:44,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) Word has length 136 [2021-11-19 13:31:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:44,145 INFO L225 Difference]: With dead ends: 1173 [2021-11-19 13:31:44,146 INFO L226 Difference]: Without dead ends: 696 [2021-11-19 13:31:44,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:31:44,150 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 2072 mSDsluCounter, 2352 mSDsCounter, 0 mSdLazyCounter, 4059 mSolverCounterSat, 824 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2072 SdHoareTripleChecker+Valid, 3301 SdHoareTripleChecker+Invalid, 4883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 4059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:44,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2072 Valid, 3301 Invalid, 4883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [824 Valid, 4059 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-19 13:31:44,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-11-19 13:31:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 561. [2021-11-19 13:31:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 435 states have (on average 1.5954022988505747) internal successors, (694), 454 states have internal predecessors, (694), 98 states have call successors, (98), 27 states have call predecessors, (98), 27 states have return successors, (109), 92 states have call predecessors, (109), 93 states have call successors, (109) [2021-11-19 13:31:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 901 transitions. [2021-11-19 13:31:44,192 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 901 transitions. Word has length 136 [2021-11-19 13:31:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:44,193 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 901 transitions. [2021-11-19 13:31:44,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-19 13:31:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 901 transitions. [2021-11-19 13:31:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 13:31:44,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:44,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:44,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:44,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:44,415 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:44,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:44,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1628364760, now seen corresponding path program 1 times [2021-11-19 13:31:44,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:44,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148930972] [2021-11-19 13:31:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:44,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:44,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:44,418 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:44,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 13:31:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:44,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:31:44,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:31:45,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:31:46,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:46,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148930972] [2021-11-19 13:31:46,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148930972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:46,057 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:46,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 13:31:46,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467159041] [2021-11-19 13:31:46,058 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:46,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:31:46,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:46,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:31:46,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:31:46,060 INFO L87 Difference]: Start difference. First operand 561 states and 901 transitions. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-19 13:31:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:53,330 INFO L93 Difference]: Finished difference Result 1958 states and 3314 transitions. [2021-11-19 13:31:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 13:31:53,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) Word has length 137 [2021-11-19 13:31:53,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:53,353 INFO L225 Difference]: With dead ends: 1958 [2021-11-19 13:31:53,353 INFO L226 Difference]: Without dead ends: 1477 [2021-11-19 13:31:53,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:31:53,360 INFO L933 BasicCegarLoop]: 1432 mSDtfsCounter, 3651 mSDsluCounter, 2295 mSDsCounter, 0 mSdLazyCounter, 5217 mSolverCounterSat, 1153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3736 SdHoareTripleChecker+Valid, 3727 SdHoareTripleChecker+Invalid, 6370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1153 IncrementalHoareTripleChecker+Valid, 5217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:53,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3736 Valid, 3727 Invalid, 6370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1153 Valid, 5217 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2021-11-19 13:31:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2021-11-19 13:31:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1388. [2021-11-19 13:31:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1068 states have (on average 1.6264044943820224) internal successors, (1737), 1116 states have internal predecessors, (1737), 252 states have call successors, (252), 66 states have call predecessors, (252), 67 states have return successors, (276), 242 states have call predecessors, (276), 247 states have call successors, (276) [2021-11-19 13:31:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2265 transitions. [2021-11-19 13:31:53,481 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2265 transitions. Word has length 137 [2021-11-19 13:31:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:53,482 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 2265 transitions. [2021-11-19 13:31:53,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-19 13:31:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2265 transitions. [2021-11-19 13:31:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:31:53,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:53,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:53,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:53,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:53,703 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:53,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:53,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2109389614, now seen corresponding path program 1 times [2021-11-19 13:31:53,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:53,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584251779] [2021-11-19 13:31:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:53,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:53,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:53,705 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:53,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 13:31:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:54,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:31:54,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:31:56,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:32:01,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:01,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584251779] [2021-11-19 13:32:01,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584251779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:01,157 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:01,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-19 13:32:01,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064803153] [2021-11-19 13:32:01,157 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:01,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:32:01,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:01,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:32:01,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:32:01,160 INFO L87 Difference]: Start difference. First operand 1388 states and 2265 transitions. Second operand has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-19 13:32:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:27,293 INFO L93 Difference]: Finished difference Result 4628 states and 7734 transitions. [2021-11-19 13:32:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:32:27,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) Word has length 139 [2021-11-19 13:32:27,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:27,336 INFO L225 Difference]: With dead ends: 4628 [2021-11-19 13:32:27,336 INFO L226 Difference]: Without dead ends: 3320 [2021-11-19 13:32:27,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:32:27,347 INFO L933 BasicCegarLoop]: 1043 mSDtfsCounter, 3565 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 4981 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3636 SdHoareTripleChecker+Valid, 2860 SdHoareTripleChecker+Invalid, 5901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 4981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:27,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3636 Valid, 2860 Invalid, 5901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 4981 Invalid, 0 Unknown, 0 Unchecked, 25.4s Time] [2021-11-19 13:32:27,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2021-11-19 13:32:27,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 2908. [2021-11-19 13:32:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2211 states have (on average 1.637720488466757) internal successors, (3621), 2309 states have internal predecessors, (3621), 577 states have call successors, (577), 114 states have call predecessors, (577), 119 states have return successors, (634), 543 states have call predecessors, (634), 572 states have call successors, (634) [2021-11-19 13:32:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 4832 transitions. [2021-11-19 13:32:27,653 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 4832 transitions. Word has length 139 [2021-11-19 13:32:27,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:27,653 INFO L470 AbstractCegarLoop]: Abstraction has 2908 states and 4832 transitions. [2021-11-19 13:32:27,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-19 13:32:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 4832 transitions. [2021-11-19 13:32:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 13:32:27,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:27,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:27,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:27,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:32:27,886 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:27,887 INFO L85 PathProgramCache]: Analyzing trace with hash 164239037, now seen corresponding path program 1 times [2021-11-19 13:32:27,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:27,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977985457] [2021-11-19 13:32:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:27,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:27,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:27,890 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:27,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 13:32:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:28,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:32:28,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:32:29,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:32:29,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:29,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977985457] [2021-11-19 13:32:29,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977985457] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:29,762 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:29,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 13:32:29,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769158215] [2021-11-19 13:32:29,763 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:29,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:32:29,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:29,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:32:29,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:32:29,766 INFO L87 Difference]: Start difference. First operand 2908 states and 4832 transitions. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:32:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:43,198 INFO L93 Difference]: Finished difference Result 10664 states and 18285 transitions. [2021-11-19 13:32:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 13:32:43,204 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) Word has length 143 [2021-11-19 13:32:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:43,280 INFO L225 Difference]: With dead ends: 10664 [2021-11-19 13:32:43,280 INFO L226 Difference]: Without dead ends: 7836 [2021-11-19 13:32:43,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-19 13:32:43,307 INFO L933 BasicCegarLoop]: 1779 mSDtfsCounter, 4956 mSDsluCounter, 3622 mSDsCounter, 0 mSdLazyCounter, 9565 mSolverCounterSat, 2015 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5069 SdHoareTripleChecker+Valid, 5401 SdHoareTripleChecker+Invalid, 11580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2015 IncrementalHoareTripleChecker+Valid, 9565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:43,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5069 Valid, 5401 Invalid, 11580 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2015 Valid, 9565 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2021-11-19 13:32:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7836 states. [2021-11-19 13:32:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7836 to 4688. [2021-11-19 13:32:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 3497 states have (on average 1.6251072347726623) internal successors, (5683), 3672 states have internal predecessors, (5683), 991 states have call successors, (991), 172 states have call predecessors, (991), 199 states have return successors, (1136), 964 states have call predecessors, (1136), 986 states have call successors, (1136) [2021-11-19 13:32:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 7810 transitions. [2021-11-19 13:32:43,951 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 7810 transitions. Word has length 143 [2021-11-19 13:32:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:43,952 INFO L470 AbstractCegarLoop]: Abstraction has 4688 states and 7810 transitions. [2021-11-19 13:32:43,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:32:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 7810 transitions. [2021-11-19 13:32:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-19 13:32:43,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:43,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:43,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:44,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:32:44,183 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:44,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1115996212, now seen corresponding path program 1 times [2021-11-19 13:32:44,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:44,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926898969] [2021-11-19 13:32:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:44,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:44,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:44,186 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:44,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 13:32:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:44,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:32:44,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:32:45,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:32:45,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:45,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926898969] [2021-11-19 13:32:45,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926898969] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:45,715 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:45,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 13:32:45,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372933719] [2021-11-19 13:32:45,716 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:45,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:32:45,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:45,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:32:45,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:32:45,717 INFO L87 Difference]: Start difference. First operand 4688 states and 7810 transitions. Second operand has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:32:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:50,723 INFO L93 Difference]: Finished difference Result 15829 states and 27043 transitions. [2021-11-19 13:32:50,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:32:50,725 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 144 [2021-11-19 13:32:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:50,821 INFO L225 Difference]: With dead ends: 15829 [2021-11-19 13:32:50,821 INFO L226 Difference]: Without dead ends: 11224 [2021-11-19 13:32:50,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:32:50,850 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 3231 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 2558 mSolverCounterSat, 923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3343 SdHoareTripleChecker+Valid, 2807 SdHoareTripleChecker+Invalid, 3481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 2558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:50,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3343 Valid, 2807 Invalid, 3481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [923 Valid, 2558 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-19 13:32:50,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11224 states. [2021-11-19 13:32:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11224 to 8916. [2021-11-19 13:32:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8916 states, 6509 states have (on average 1.616530957136273) internal successors, (10522), 6873 states have internal predecessors, (10522), 2048 states have call successors, (2048), 288 states have call predecessors, (2048), 358 states have return successors, (2408), 2024 states have call predecessors, (2408), 2043 states have call successors, (2408) [2021-11-19 13:32:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8916 states to 8916 states and 14978 transitions. [2021-11-19 13:32:51,978 INFO L78 Accepts]: Start accepts. Automaton has 8916 states and 14978 transitions. Word has length 144 [2021-11-19 13:32:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:51,979 INFO L470 AbstractCegarLoop]: Abstraction has 8916 states and 14978 transitions. [2021-11-19 13:32:51,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:32:51,980 INFO L276 IsEmpty]: Start isEmpty. Operand 8916 states and 14978 transitions. [2021-11-19 13:32:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 13:32:51,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:51,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:52,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:52,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:32:52,199 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1788715552, now seen corresponding path program 1 times [2021-11-19 13:32:52,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:52,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548598599] [2021-11-19 13:32:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:52,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:52,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:52,202 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:52,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 13:32:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:52,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:32:52,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:32:53,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:32:54,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:54,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548598599] [2021-11-19 13:32:54,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548598599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:54,003 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:54,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 13:32:54,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085268820] [2021-11-19 13:32:54,004 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:54,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:32:54,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:32:54,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:32:54,006 INFO L87 Difference]: Start difference. First operand 8916 states and 14978 transitions. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:33:00,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:00,467 INFO L93 Difference]: Finished difference Result 33996 states and 58638 transitions. [2021-11-19 13:33:00,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:33:00,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 145 [2021-11-19 13:33:00,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:00,672 INFO L225 Difference]: With dead ends: 33996 [2021-11-19 13:33:00,673 INFO L226 Difference]: Without dead ends: 25165 [2021-11-19 13:33:00,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:33:00,725 INFO L933 BasicCegarLoop]: 1611 mSDtfsCounter, 3269 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3382 SdHoareTripleChecker+Valid, 2723 SdHoareTripleChecker+Invalid, 3443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 924 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:00,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3382 Valid, 2723 Invalid, 3443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [924 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 13:33:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25165 states. [2021-11-19 13:33:03,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25165 to 19650. [2021-11-19 13:33:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19650 states, 14074 states have (on average 1.609350575529345) internal successors, (22650), 14924 states have internal predecessors, (22650), 4861 states have call successors, (4861), 520 states have call predecessors, (4861), 714 states have return successors, (5848), 4844 states have call predecessors, (5848), 4856 states have call successors, (5848) [2021-11-19 13:33:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19650 states to 19650 states and 33359 transitions. [2021-11-19 13:33:03,462 INFO L78 Accepts]: Start accepts. Automaton has 19650 states and 33359 transitions. Word has length 145 [2021-11-19 13:33:03,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:03,462 INFO L470 AbstractCegarLoop]: Abstraction has 19650 states and 33359 transitions. [2021-11-19 13:33:03,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:33:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 19650 states and 33359 transitions. [2021-11-19 13:33:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 13:33:03,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:03,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:03,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:03,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:03,683 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:03,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:03,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1726699217, now seen corresponding path program 1 times [2021-11-19 13:33:03,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:03,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21036923] [2021-11-19 13:33:03,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:03,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:03,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:03,686 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:03,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 13:33:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:04,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:33:04,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:33:04,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:33:05,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:05,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21036923] [2021-11-19 13:33:05,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21036923] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:05,515 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:05,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 13:33:05,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614698409] [2021-11-19 13:33:05,516 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:05,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:33:05,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:05,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:33:05,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:33:05,517 INFO L87 Difference]: Start difference. First operand 19650 states and 33359 transitions. Second operand has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:33:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:16,574 INFO L93 Difference]: Finished difference Result 82487 states and 143626 transitions. [2021-11-19 13:33:16,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:33:16,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 146 [2021-11-19 13:33:16,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:17,344 INFO L225 Difference]: With dead ends: 82487 [2021-11-19 13:33:17,344 INFO L226 Difference]: Without dead ends: 62926 [2021-11-19 13:33:17,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:33:17,466 INFO L933 BasicCegarLoop]: 1619 mSDtfsCounter, 2742 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 2617 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2856 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 3381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 2617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:17,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2856 Valid, 2931 Invalid, 3381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 2617 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 13:33:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62926 states. [2021-11-19 13:33:23,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62926 to 48360. [2021-11-19 13:33:24,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48360 states, 34191 states have (on average 1.6043403234769384) internal successors, (54854), 36339 states have internal predecessors, (54854), 12618 states have call successors, (12618), 984 states have call predecessors, (12618), 1550 states have return successors, (15506), 12612 states have call predecessors, (15506), 12613 states have call successors, (15506) [2021-11-19 13:33:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48360 states to 48360 states and 82978 transitions. [2021-11-19 13:33:24,772 INFO L78 Accepts]: Start accepts. Automaton has 48360 states and 82978 transitions. Word has length 146 [2021-11-19 13:33:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:24,773 INFO L470 AbstractCegarLoop]: Abstraction has 48360 states and 82978 transitions. [2021-11-19 13:33:24,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:33:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 48360 states and 82978 transitions. [2021-11-19 13:33:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 13:33:24,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:24,779 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:24,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:25,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:25,002 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:25,003 INFO L85 PathProgramCache]: Analyzing trace with hash -109574971, now seen corresponding path program 1 times [2021-11-19 13:33:25,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:25,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911216611] [2021-11-19 13:33:25,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:25,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:25,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:25,006 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:25,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013783d2-695b-4317-8180-90612b338390/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 13:33:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:25,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:33:25,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:33:26,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:33:26,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:26,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911216611] [2021-11-19 13:33:26,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911216611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:26,682 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:26,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 13:33:26,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140813370] [2021-11-19 13:33:26,683 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:26,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:33:26,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:26,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:33:26,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:33:26,684 INFO L87 Difference]: Start difference. First operand 48360 states and 82978 transitions. Second operand has 8 states, 8 states have (on average 23.125) internal successors, (185), 8 states have internal predecessors, (185), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28)