./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF --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 d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:14:51,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:14:51,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:14:51,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:14:51,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:14:51,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:14:51,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:14:51,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:14:51,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:14:51,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:14:51,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:14:51,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:14:51,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:14:51,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:14:51,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:14:51,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:14:51,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:14:51,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:14:51,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:14:51,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:14:51,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:14:51,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:14:51,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:14:51,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:14:51,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:14:51,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:14:51,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:14:51,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:14:51,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:14:51,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:14:51,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:14:51,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:14:51,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:14:51,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:14:51,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:14:51,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:14:51,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:14:51,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:14:51,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:14:51,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:14:51,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:14:51,200 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:14:51,231 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:14:51,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:14:51,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:14:51,233 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:14:51,234 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:14:51,234 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:14:51,234 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:14:51,235 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:14:51,235 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:14:51,235 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:14:51,235 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:14:51,236 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:14:51,236 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:14:51,236 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:14:51,237 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:14:51,237 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:14:51,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:14:51,238 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:14:51,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:14:51,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:14:51,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:14:51,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:14:51,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:14:51,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:14:51,240 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:14:51,240 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:14:51,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:14:51,241 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:14:51,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:14:51,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:14:51,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:14:51,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:14:51,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:14:51,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:14:51,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:14:51,243 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:14:51,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:14:51,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:14:51,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:14:51,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:14:51,245 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_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 [2021-11-12 23:14:51,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:14:51,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:14:51,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:14:51,619 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:14:51,620 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:14:51,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2021-11-12 23:14:51,701 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/data/dbe354ead/2b0ce31b06464d84a65859b8bf914afe/FLAGfb4b0d4b4 [2021-11-12 23:14:52,626 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:14:52,627 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2021-11-12 23:14:52,655 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/data/dbe354ead/2b0ce31b06464d84a65859b8bf914afe/FLAGfb4b0d4b4 [2021-11-12 23:14:52,716 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/data/dbe354ead/2b0ce31b06464d84a65859b8bf914afe [2021-11-12 23:14:52,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:14:52,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:14:52,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:14:52,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:14:52,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:14:52,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:14:52" (1/1) ... [2021-11-12 23:14:52,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635bf6da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:52, skipping insertion in model container [2021-11-12 23:14:52,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:14:52" (1/1) ... [2021-11-12 23:14:52,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:14:52,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:14:53,480 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2021-11-12 23:14:53,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:14:53,565 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) [2021-11-12 23:14:53,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5fe4e9de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:53, skipping insertion in model container [2021-11-12 23:14:53,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:14:53,567 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:14:53,573 INFO L158 Benchmark]: Toolchain (without parser) took 847.34ms. Allocated memory is still 117.4MB. Free memory was 78.0MB in the beginning and 79.0MB in the end (delta: -1.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:14:53,573 INFO L158 Benchmark]: CDTParser took 0.49ms. Allocated memory is still 117.4MB. Free memory is still 97.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:14:53,574 INFO L158 Benchmark]: CACSL2BoogieTranslator took 843.85ms. Allocated memory is still 117.4MB. Free memory was 77.7MB in the beginning and 79.0MB in the end (delta: -1.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:14:53,577 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49ms. Allocated memory is still 117.4MB. Free memory is still 97.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 843.85ms. Allocated memory is still 117.4MB. Free memory was 77.7MB in the beginning and 79.0MB in the end (delta: -1.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF --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 d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:14:56,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:14:56,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:14:56,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:14:56,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:14:56,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:14:56,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:14:56,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:14:56,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:14:56,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:14:56,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:14:56,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:14:56,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:14:56,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:14:56,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:14:56,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:14:56,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:14:56,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:14:56,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:14:56,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:14:56,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:14:56,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:14:56,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:14:56,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:14:56,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:14:56,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:14:56,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:14:56,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:14:56,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:14:56,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:14:56,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:14:56,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:14:56,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:14:56,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:14:56,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:14:56,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:14:56,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:14:56,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:14:56,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:14:56,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:14:56,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:14:56,405 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:14:56,461 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:14:56,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:14:56,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:14:56,464 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:14:56,464 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:14:56,464 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:14:56,464 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:14:56,464 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:14:56,465 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:14:56,465 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:14:56,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:14:56,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:14:56,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:14:56,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:14:56,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:14:56,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:14:56,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:14:56,470 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:14:56,470 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:14:56,470 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:14:56,470 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:14:56,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:14:56,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:14:56,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:14:56,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:14:56,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:14:56,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:14:56,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:14:56,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:14:56,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:14:56,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:14:56,473 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:14:56,473 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:14:56,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:14:56,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:14:56,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:14:56,474 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_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 [2021-11-12 23:14:56,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:14:56,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:14:56,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:14:56,987 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:14:56,991 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:14:56,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2021-11-12 23:14:57,079 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/data/3bb6817fc/64b668f50fa24e288d088d73dd9881ef/FLAGe6ef08e78 [2021-11-12 23:14:58,001 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:14:58,002 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2021-11-12 23:14:58,031 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/data/3bb6817fc/64b668f50fa24e288d088d73dd9881ef/FLAGe6ef08e78 [2021-11-12 23:14:58,093 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/data/3bb6817fc/64b668f50fa24e288d088d73dd9881ef [2021-11-12 23:14:58,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:14:58,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:14:58,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:14:58,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:14:58,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:14:58,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:14:58" (1/1) ... [2021-11-12 23:14:58,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@302183fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:58, skipping insertion in model container [2021-11-12 23:14:58,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:14:58" (1/1) ... [2021-11-12 23:14:58,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:14:58,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:14:58,922 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2021-11-12 23:14:59,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:14:59,041 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:14:59,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:14:59,192 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2021-11-12 23:14:59,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:14:59,238 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:14:59,353 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2021-11-12 23:14:59,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:14:59,418 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:14:59,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:59 WrapperNode [2021-11-12 23:14:59,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:14:59,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:14:59,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:14:59,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:14:59,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:59" (1/1) ... [2021-11-12 23:14:59,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:59" (1/1) ... [2021-11-12 23:14:59,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:14:59,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:14:59,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:14:59,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:14:59,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:59" (1/1) ... [2021-11-12 23:14:59,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:59" (1/1) ... [2021-11-12 23:14:59,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:59" (1/1) ... [2021-11-12 23:14:59,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:59" (1/1) ... [2021-11-12 23:14:59,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:59" (1/1) ... [2021-11-12 23:14:59,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:59" (1/1) ... [2021-11-12 23:14:59,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:59" (1/1) ... [2021-11-12 23:14:59,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:14:59,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:14:59,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:14:59,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:14:59,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:59" (1/1) ... [2021-11-12 23:14:59,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:14:59,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:14:59,755 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:14:59,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:14:59,810 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:14:59,810 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:14:59,810 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:14:59,810 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:14:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:14:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:14:59,811 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:14:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:14:59,811 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:14:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:14:59,812 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:14:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:14:59,812 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:14:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:14:59,812 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:14:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:14:59,813 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:14:59,813 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:14:59,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:14:59,813 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:14:59,813 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:14:59,813 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:14:59,814 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:14:59,814 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:14:59,814 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:14:59,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:14:59,814 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:14:59,814 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:14:59,814 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:14:59,815 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:14:59,815 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2021-11-12 23:14:59,815 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2021-11-12 23:14:59,815 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:14:59,815 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:14:59,815 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:14:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:14:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:14:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:14:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2021-11-12 23:14:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2021-11-12 23:14:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:14:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:14:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:14:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:14:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:14:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:14:59,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:14:59,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:14:59,818 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:14:59,819 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:15:04,201 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:15:04,201 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:15:04,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:15:04 BoogieIcfgContainer [2021-11-12 23:15:04,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:15:04,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:15:04,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:15:04,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:15:04,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:14:58" (1/3) ... [2021-11-12 23:15:04,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626a450a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:15:04, skipping insertion in model container [2021-11-12 23:15:04,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:14:59" (2/3) ... [2021-11-12 23:15:04,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626a450a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:15:04, skipping insertion in model container [2021-11-12 23:15:04,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:15:04" (3/3) ... [2021-11-12 23:15:04,216 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product26.cil.c [2021-11-12 23:15:04,222 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:15:04,223 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:15:04,291 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:15:04,299 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 [2021-11-12 23:15:04,300 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:15:04,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 545 states, 431 states have (on average 1.7076566125290022) internal successors, (736), 454 states have internal predecessors, (736), 89 states have call successors, (89), 23 states have call predecessors, (89), 23 states have return successors, (89), 82 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:15:04,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:15:04,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:04,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:04,383 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:04,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1868940779, now seen corresponding path program 1 times [2021-11-12 23:15:04,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:04,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888336740] [2021-11-12 23:15:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:04,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:04,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:04,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:04,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:15:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:05,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:15:05,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:05,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:05,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:05,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888336740] [2021-11-12 23:15:05,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888336740] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:05,703 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:05,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:15:05,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439923207] [2021-11-12 23:15:05,708 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:05,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:15:05,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:05,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:15:05,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:15:05,760 INFO L87 Difference]: Start difference. First operand has 545 states, 431 states have (on average 1.7076566125290022) internal successors, (736), 454 states have internal predecessors, (736), 89 states have call successors, (89), 23 states have call predecessors, (89), 23 states have return successors, (89), 82 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-12 23:15:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:05,865 INFO L93 Difference]: Finished difference Result 566 states and 944 transitions. [2021-11-12 23:15:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:15:05,868 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2021-11-12 23:15:05,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:05,909 INFO L225 Difference]: With dead ends: 566 [2021-11-12 23:15:05,909 INFO L226 Difference]: Without dead ends: 537 [2021-11-12 23:15:05,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:15:05,921 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:05,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 9.61ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:15:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-12 23:15:06,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-12 23:15:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 425 states have (on average 1.7058823529411764) internal successors, (725), 446 states have internal predecessors, (725), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:15:06,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 898 transitions. [2021-11-12 23:15:06,128 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 898 transitions. Word has length 58 [2021-11-12 23:15:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:06,132 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 898 transitions. [2021-11-12 23:15:06,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-12 23:15:06,133 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 898 transitions. [2021-11-12 23:15:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:15:06,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:06,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:06,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:06,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:06,379 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:06,380 INFO L85 PathProgramCache]: Analyzing trace with hash 314990953, now seen corresponding path program 1 times [2021-11-12 23:15:06,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:06,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524524170] [2021-11-12 23:15:06,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:06,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:06,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:06,384 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:06,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:15:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:06,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:06,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:07,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:07,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:07,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524524170] [2021-11-12 23:15:07,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524524170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:07,477 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:07,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:15:07,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012183419] [2021-11-12 23:15:07,477 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:07,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:15:07,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:07,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:15:07,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:07,481 INFO L87 Difference]: Start difference. First operand 537 states and 898 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:15:07,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:07,666 INFO L93 Difference]: Finished difference Result 1058 states and 1774 transitions. [2021-11-12 23:15:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:15:07,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 60 [2021-11-12 23:15:07,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:07,675 INFO L225 Difference]: With dead ends: 1058 [2021-11-12 23:15:07,675 INFO L226 Difference]: Without dead ends: 537 [2021-11-12 23:15:07,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:15:07,683 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 15 mSDsluCounter, 2648 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3533 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.66ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:07,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3533 Invalid, 36 Unknown, 0 Unchecked, 46.66ms Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 45.12ms Time] [2021-11-12 23:15:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-12 23:15:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-12 23:15:07,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 425 states have (on average 1.6917647058823528) internal successors, (719), 446 states have internal predecessors, (719), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:15:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 892 transitions. [2021-11-12 23:15:07,723 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 892 transitions. Word has length 60 [2021-11-12 23:15:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:07,723 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 892 transitions. [2021-11-12 23:15:07,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:15:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 892 transitions. [2021-11-12 23:15:07,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-12 23:15:07,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:07,727 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:07,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:07,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:07,944 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:07,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1531282391, now seen corresponding path program 1 times [2021-11-12 23:15:07,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:07,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811267269] [2021-11-12 23:15:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:07,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:07,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:07,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:07,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:15:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:08,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:15:08,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:08,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:09,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:09,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811267269] [2021-11-12 23:15:09,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811267269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:09,203 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:09,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:15:09,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873635072] [2021-11-12 23:15:09,203 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:09,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:15:09,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:09,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:15:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:15:09,206 INFO L87 Difference]: Start difference. First operand 537 states and 892 transitions. Second operand has 11 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:15:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:09,473 INFO L93 Difference]: Finished difference Result 1016 states and 1691 transitions. [2021-11-12 23:15:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:15:09,475 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 65 [2021-11-12 23:15:09,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:09,482 INFO L225 Difference]: With dead ends: 1016 [2021-11-12 23:15:09,483 INFO L226 Difference]: Without dead ends: 531 [2021-11-12 23:15:09,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:15:09,488 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 118 mSDsluCounter, 5984 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6863 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.31ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:09,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 6863 Invalid, 85 Unknown, 0 Unchecked, 26.31ms Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 140.42ms Time] [2021-11-12 23:15:09,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-12 23:15:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-12 23:15:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 419 states have (on average 1.6849642004773269) internal successors, (706), 440 states have internal predecessors, (706), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:15:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 879 transitions. [2021-11-12 23:15:09,525 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 879 transitions. Word has length 65 [2021-11-12 23:15:09,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:09,526 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 879 transitions. [2021-11-12 23:15:09,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:15:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 879 transitions. [2021-11-12 23:15:09,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-12 23:15:09,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:09,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:09,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:09,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:09,749 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:09,750 INFO L85 PathProgramCache]: Analyzing trace with hash 423106339, now seen corresponding path program 1 times [2021-11-12 23:15:09,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:09,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022056021] [2021-11-12 23:15:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:09,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:09,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:09,755 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:09,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:15:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:10,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:10,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:10,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:10,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022056021] [2021-11-12 23:15:10,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022056021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:10,757 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:10,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:15:10,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948924403] [2021-11-12 23:15:10,758 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:10,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:15:10,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:15:10,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:10,760 INFO L87 Difference]: Start difference. First operand 531 states and 879 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:15:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:11,020 INFO L93 Difference]: Finished difference Result 1019 states and 1692 transitions. [2021-11-12 23:15:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:15:11,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2021-11-12 23:15:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:11,028 INFO L225 Difference]: With dead ends: 1019 [2021-11-12 23:15:11,028 INFO L226 Difference]: Without dead ends: 531 [2021-11-12 23:15:11,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:15:11,033 INFO L933 BasicCegarLoop]: 830 mSDtfsCounter, 194 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 2486 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.75ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:11,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 2486 Invalid, 146 Unknown, 0 Unchecked, 8.75ms Time], IncrementalHoareTripleChecker [23 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 166.23ms Time] [2021-11-12 23:15:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-12 23:15:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-12 23:15:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 419 states have (on average 1.6276849642004774) internal successors, (682), 440 states have internal predecessors, (682), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:15:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 855 transitions. [2021-11-12 23:15:11,066 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 855 transitions. Word has length 66 [2021-11-12 23:15:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:11,066 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 855 transitions. [2021-11-12 23:15:11,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:15:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 855 transitions. [2021-11-12 23:15:11,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:15:11,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:11,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:11,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:11,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:11,284 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1284448200, now seen corresponding path program 1 times [2021-11-12 23:15:11,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:11,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400065476] [2021-11-12 23:15:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:11,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:11,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:11,288 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:11,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:15:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:11,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:15:11,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:12,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:12,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:12,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400065476] [2021-11-12 23:15:12,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400065476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:12,400 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:12,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:15:12,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73966765] [2021-11-12 23:15:12,401 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:12,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:15:12,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:15:12,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:15:12,403 INFO L87 Difference]: Start difference. First operand 531 states and 855 transitions. Second operand has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:15:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:12,566 INFO L93 Difference]: Finished difference Result 1010 states and 1654 transitions. [2021-11-12 23:15:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:15:12,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 68 [2021-11-12 23:15:12,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:12,574 INFO L225 Difference]: With dead ends: 1010 [2021-11-12 23:15:12,574 INFO L226 Difference]: Without dead ends: 510 [2021-11-12 23:15:12,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:15:12,579 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 117 mSDsluCounter, 4152 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 4995 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.85ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:12,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 4995 Invalid, 57 Unknown, 0 Unchecked, 12.85ms Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 86.42ms Time] [2021-11-12 23:15:12,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-12 23:15:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-11-12 23:15:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 398 states have (on average 1.650753768844221) internal successors, (657), 419 states have internal predecessors, (657), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:15:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 830 transitions. [2021-11-12 23:15:12,627 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 830 transitions. Word has length 68 [2021-11-12 23:15:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:12,628 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 830 transitions. [2021-11-12 23:15:12,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:15:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 830 transitions. [2021-11-12 23:15:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:15:12,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:12,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:12,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:12,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:12,863 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:12,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1502642730, now seen corresponding path program 1 times [2021-11-12 23:15:12,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:12,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854282066] [2021-11-12 23:15:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:12,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:12,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:12,867 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:12,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:15:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:13,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:15:13,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:13,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:14,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:14,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854282066] [2021-11-12 23:15:14,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854282066] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:14,229 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:14,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:15:14,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28443274] [2021-11-12 23:15:14,229 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:14,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:15:14,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:14,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:15:14,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:15:14,231 INFO L87 Difference]: Start difference. First operand 510 states and 830 transitions. Second operand has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:15:14,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:14,464 INFO L93 Difference]: Finished difference Result 983 states and 1618 transitions. [2021-11-12 23:15:14,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:15:14,465 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 71 [2021-11-12 23:15:14,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:14,471 INFO L225 Difference]: With dead ends: 983 [2021-11-12 23:15:14,472 INFO L226 Difference]: Without dead ends: 510 [2021-11-12 23:15:14,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:15:14,477 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 46 mSDsluCounter, 4869 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 5684 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.30ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 117.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:14,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 5684 Invalid, 85 Unknown, 0 Unchecked, 17.30ms Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 117.64ms Time] [2021-11-12 23:15:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-12 23:15:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-11-12 23:15:14,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 398 states have (on average 1.6482412060301508) internal successors, (656), 419 states have internal predecessors, (656), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:15:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 829 transitions. [2021-11-12 23:15:14,520 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 829 transitions. Word has length 71 [2021-11-12 23:15:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:14,521 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 829 transitions. [2021-11-12 23:15:14,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:15:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 829 transitions. [2021-11-12 23:15:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:15:14,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:14,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:14,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:14,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:14,740 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:14,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1423587426, now seen corresponding path program 1 times [2021-11-12 23:15:14,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:14,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303531581] [2021-11-12 23:15:14,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:14,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:14,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:14,743 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:14,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:15:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:15,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:15:15,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:15,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:16,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:16,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303531581] [2021-11-12 23:15:16,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303531581] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:16,499 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:16,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-12 23:15:16,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337481846] [2021-11-12 23:15:16,500 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:16,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:15:16,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:15:16,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:15:16,501 INFO L87 Difference]: Start difference. First operand 510 states and 829 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-12 23:15:18,536 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:28,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:28,891 INFO L93 Difference]: Finished difference Result 2560 states and 4298 transitions. [2021-11-12 23:15:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:15:28,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) Word has length 72 [2021-11-12 23:15:28,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:28,919 INFO L225 Difference]: With dead ends: 2560 [2021-11-12 23:15:28,919 INFO L226 Difference]: Without dead ends: 2095 [2021-11-12 23:15:28,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:15:28,926 INFO L933 BasicCegarLoop]: 1504 mSDtfsCounter, 3873 mSDsluCounter, 1948 mSDsCounter, 0 mSdLazyCounter, 5737 mSolverCounterSat, 970 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10456.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4033 SdHoareTripleChecker+Valid, 3452 SdHoareTripleChecker+Invalid, 6708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.62ms SdHoareTripleChecker+Time, 970 IncrementalHoareTripleChecker+Valid, 5737 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11891.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:28,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4033 Valid, 3452 Invalid, 6708 Unknown, 0 Unchecked, 56.62ms Time], IncrementalHoareTripleChecker [970 Valid, 5737 Invalid, 1 Unknown, 0 Unchecked, 11891.69ms Time] [2021-11-12 23:15:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-11-12 23:15:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1907. [2021-11-12 23:15:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1488 states have (on average 1.6875) internal successors, (2511), 1553 states have internal predecessors, (2511), 345 states have call successors, (345), 70 states have call predecessors, (345), 73 states have return successors, (353), 310 states have call predecessors, (353), 340 states have call successors, (353) [2021-11-12 23:15:29,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 3209 transitions. [2021-11-12 23:15:29,143 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 3209 transitions. Word has length 72 [2021-11-12 23:15:29,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:29,144 INFO L470 AbstractCegarLoop]: Abstraction has 1907 states and 3209 transitions. [2021-11-12 23:15:29,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-12 23:15:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 3209 transitions. [2021-11-12 23:15:29,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 23:15:29,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:29,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:29,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:29,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:29,375 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:29,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:29,377 INFO L85 PathProgramCache]: Analyzing trace with hash 604630383, now seen corresponding path program 1 times [2021-11-12 23:15:29,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:29,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975013671] [2021-11-12 23:15:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:29,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:29,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:29,381 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:29,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:15:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:30,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:15:30,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:30,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:31,111 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:31,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975013671] [2021-11-12 23:15:31,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975013671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:31,112 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:31,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:15:31,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206231550] [2021-11-12 23:15:31,113 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:31,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:15:31,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:31,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:15:31,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:15:31,116 INFO L87 Difference]: Start difference. First operand 1907 states and 3209 transitions. Second operand has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 11 states have internal predecessors, (116), 7 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-12 23:15:33,153 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:35,162 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:37,167 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:47,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:47,641 INFO L93 Difference]: Finished difference Result 5036 states and 8488 transitions. [2021-11-12 23:15:47,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 23:15:47,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 11 states have internal predecessors, (116), 7 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 100 [2021-11-12 23:15:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:47,679 INFO L225 Difference]: With dead ends: 5036 [2021-11-12 23:15:47,679 INFO L226 Difference]: Without dead ends: 3174 [2021-11-12 23:15:47,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:15:47,698 INFO L933 BasicCegarLoop]: 1679 mSDtfsCounter, 2779 mSDsluCounter, 3931 mSDsCounter, 0 mSdLazyCounter, 7724 mSolverCounterSat, 855 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14412.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2862 SdHoareTripleChecker+Valid, 5610 SdHoareTripleChecker+Invalid, 8582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.98ms SdHoareTripleChecker+Time, 855 IncrementalHoareTripleChecker+Valid, 7724 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15796.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:47,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2862 Valid, 5610 Invalid, 8582 Unknown, 0 Unchecked, 52.98ms Time], IncrementalHoareTripleChecker [855 Valid, 7724 Invalid, 3 Unknown, 0 Unchecked, 15796.95ms Time] [2021-11-12 23:15:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-11-12 23:15:47,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 2702. [2021-11-12 23:15:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2074 states have (on average 1.6557377049180328) internal successors, (3434), 2165 states have internal predecessors, (3434), 514 states have call successors, (514), 97 states have call predecessors, (514), 113 states have return successors, (550), 472 states have call predecessors, (550), 509 states have call successors, (550) [2021-11-12 23:15:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 4498 transitions. [2021-11-12 23:15:47,999 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 4498 transitions. Word has length 100 [2021-11-12 23:15:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:48,000 INFO L470 AbstractCegarLoop]: Abstraction has 2702 states and 4498 transitions. [2021-11-12 23:15:48,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 11 states have internal predecessors, (116), 7 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-12 23:15:48,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 4498 transitions. [2021-11-12 23:15:48,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 23:15:48,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:48,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:48,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:48,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:48,224 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:48,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1714077476, now seen corresponding path program 1 times [2021-11-12 23:15:48,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:48,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268233487] [2021-11-12 23:15:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:48,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:48,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:48,226 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:48,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:15:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:48,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:15:48,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:49,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:50,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:50,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268233487] [2021-11-12 23:15:50,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268233487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:50,412 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:50,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 23:15:50,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045395891] [2021-11-12 23:15:50,413 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:50,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:15:50,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:50,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:15:50,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:15:50,415 INFO L87 Difference]: Start difference. First operand 2702 states and 4498 transitions. Second operand has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 12 states have internal predecessors, (134), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-12 23:15:52,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:54,463 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:56,468 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:58,474 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:03,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:03,645 INFO L93 Difference]: Finished difference Result 6144 states and 10429 transitions. [2021-11-12 23:16:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:16:03,646 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 12 states have internal predecessors, (134), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) Word has length 101 [2021-11-12 23:16:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:03,684 INFO L225 Difference]: With dead ends: 6144 [2021-11-12 23:16:03,685 INFO L226 Difference]: Without dead ends: 3487 [2021-11-12 23:16:03,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:16:03,709 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 1469 mSDsluCounter, 2553 mSDsCounter, 0 mSdLazyCounter, 4516 mSolverCounterSat, 570 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12197.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 3426 SdHoareTripleChecker+Invalid, 5090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.82ms SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 4516 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12876.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:03,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 3426 Invalid, 5090 Unknown, 0 Unchecked, 45.82ms Time], IncrementalHoareTripleChecker [570 Valid, 4516 Invalid, 4 Unknown, 0 Unchecked, 12876.14ms Time] [2021-11-12 23:16:03,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2021-11-12 23:16:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 2726. [2021-11-12 23:16:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2726 states, 2092 states have (on average 1.650095602294455) internal successors, (3452), 2183 states have internal predecessors, (3452), 514 states have call successors, (514), 97 states have call predecessors, (514), 119 states have return successors, (616), 478 states have call predecessors, (616), 509 states have call successors, (616) [2021-11-12 23:16:03,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2726 states to 2726 states and 4582 transitions. [2021-11-12 23:16:03,972 INFO L78 Accepts]: Start accepts. Automaton has 2726 states and 4582 transitions. Word has length 101 [2021-11-12 23:16:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:03,973 INFO L470 AbstractCegarLoop]: Abstraction has 2726 states and 4582 transitions. [2021-11-12 23:16:03,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 12 states have internal predecessors, (134), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-12 23:16:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2726 states and 4582 transitions. [2021-11-12 23:16:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:16:03,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:03,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:04,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:04,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:04,201 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:04,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1881477366, now seen corresponding path program 1 times [2021-11-12 23:16:04,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:04,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965088857] [2021-11-12 23:16:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:04,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:04,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:04,248 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:04,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:16:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:04,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:16:04,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:05,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:06,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:06,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965088857] [2021-11-12 23:16:06,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965088857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:06,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:16:06,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:16:06,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699126912] [2021-11-12 23:16:06,031 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:06,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:16:06,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:06,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:16:06,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:16:06,033 INFO L87 Difference]: Start difference. First operand 2726 states and 4582 transitions. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-12 23:16:08,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:10,061 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:16,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:16,243 INFO L93 Difference]: Finished difference Result 8917 states and 15353 transitions. [2021-11-12 23:16:16,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:16:16,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2021-11-12 23:16:16,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:16,322 INFO L225 Difference]: With dead ends: 8917 [2021-11-12 23:16:16,322 INFO L226 Difference]: Without dead ends: 6236 [2021-11-12 23:16:16,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:16:16,354 INFO L933 BasicCegarLoop]: 1359 mSDtfsCounter, 3820 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 3478 mSolverCounterSat, 1014 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8807.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3889 SdHoareTripleChecker+Valid, 3019 SdHoareTripleChecker+Invalid, 4494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.20ms SdHoareTripleChecker+Time, 1014 IncrementalHoareTripleChecker+Valid, 3478 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9593.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:16,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3889 Valid, 3019 Invalid, 4494 Unknown, 0 Unchecked, 31.20ms Time], IncrementalHoareTripleChecker [1014 Valid, 3478 Invalid, 2 Unknown, 0 Unchecked, 9593.72ms Time] [2021-11-12 23:16:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-11-12 23:16:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 5844. [2021-11-12 23:16:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5844 states, 4458 states have (on average 1.6343651861821444) internal successors, (7286), 4676 states have internal predecessors, (7286), 1112 states have call successors, (1112), 237 states have call predecessors, (1112), 273 states have return successors, (1286), 1007 states have call predecessors, (1286), 1107 states have call successors, (1286) [2021-11-12 23:16:16,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5844 states to 5844 states and 9684 transitions. [2021-11-12 23:16:16,956 INFO L78 Accepts]: Start accepts. Automaton has 5844 states and 9684 transitions. Word has length 102 [2021-11-12 23:16:16,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:16,957 INFO L470 AbstractCegarLoop]: Abstraction has 5844 states and 9684 transitions. [2021-11-12 23:16:16,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-12 23:16:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 5844 states and 9684 transitions. [2021-11-12 23:16:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 23:16:16,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:16,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:16,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:17,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:17,175 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:17,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:17,176 INFO L85 PathProgramCache]: Analyzing trace with hash -150142743, now seen corresponding path program 1 times [2021-11-12 23:16:17,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:17,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019215152] [2021-11-12 23:16:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:17,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:17,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:17,178 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:17,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:16:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:17,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:16:17,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:18,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:18,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:18,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019215152] [2021-11-12 23:16:18,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019215152] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:18,978 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:16:18,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:16:18,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429577838] [2021-11-12 23:16:18,978 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:18,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:16:18,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:18,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:16:18,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:16:18,981 INFO L87 Difference]: Start difference. First operand 5844 states and 9684 transitions. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 23:16:21,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:23,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:28,842 INFO L93 Difference]: Finished difference Result 17138 states and 29012 transitions. [2021-11-12 23:16:28,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:16:28,843 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 104 [2021-11-12 23:16:28,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:28,951 INFO L225 Difference]: With dead ends: 17138 [2021-11-12 23:16:28,952 INFO L226 Difference]: Without dead ends: 12264 [2021-11-12 23:16:28,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:16:28,994 INFO L933 BasicCegarLoop]: 986 mSDtfsCounter, 2698 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 3104 mSolverCounterSat, 608 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8105.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2763 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 3714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.91ms SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 3104 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8862.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:28,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2763 Valid, 2368 Invalid, 3714 Unknown, 0 Unchecked, 24.91ms Time], IncrementalHoareTripleChecker [608 Valid, 3104 Invalid, 2 Unknown, 0 Unchecked, 8862.27ms Time] [2021-11-12 23:16:29,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12264 states. [2021-11-12 23:16:30,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12264 to 11637. [2021-11-12 23:16:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11637 states, 8849 states have (on average 1.6339699401062266) internal successors, (14459), 9337 states have internal predecessors, (14459), 2176 states have call successors, (2176), 449 states have call predecessors, (2176), 611 states have return successors, (2860), 1993 states have call predecessors, (2860), 2171 states have call successors, (2860) [2021-11-12 23:16:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11637 states to 11637 states and 19495 transitions. [2021-11-12 23:16:30,313 INFO L78 Accepts]: Start accepts. Automaton has 11637 states and 19495 transitions. Word has length 104 [2021-11-12 23:16:30,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:30,314 INFO L470 AbstractCegarLoop]: Abstraction has 11637 states and 19495 transitions. [2021-11-12 23:16:30,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 23:16:30,316 INFO L276 IsEmpty]: Start isEmpty. Operand 11637 states and 19495 transitions. [2021-11-12 23:16:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:16:30,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:30,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:30,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:30,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:30,537 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:30,538 INFO L85 PathProgramCache]: Analyzing trace with hash 248330672, now seen corresponding path program 1 times [2021-11-12 23:16:30,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:30,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248039920] [2021-11-12 23:16:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:30,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:30,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:30,540 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:30,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:16:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:31,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:16:31,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:31,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:32,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:32,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248039920] [2021-11-12 23:16:32,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248039920] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:32,936 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:16:32,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:16:32,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098391925] [2021-11-12 23:16:32,937 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:32,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:16:32,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:32,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:16:32,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:16:32,938 INFO L87 Difference]: Start difference. First operand 11637 states and 19495 transitions. Second operand has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 12 states have internal predecessors, (135), 7 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (22), 9 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 23:16:34,976 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:36,984 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:38,990 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:40,996 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:43,001 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:45,006 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:56,062 INFO L93 Difference]: Finished difference Result 32384 states and 54821 transitions. [2021-11-12 23:16:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:16:56,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 12 states have internal predecessors, (135), 7 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (22), 9 states have call predecessors, (22), 6 states have call successors, (22) Word has length 109 [2021-11-12 23:16:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:56,297 INFO L225 Difference]: With dead ends: 32384 [2021-11-12 23:16:56,297 INFO L226 Difference]: Without dead ends: 21417 [2021-11-12 23:16:56,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:16:56,360 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 4709 mSDsluCounter, 2440 mSDsCounter, 0 mSdLazyCounter, 6846 mSolverCounterSat, 1287 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20044.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4778 SdHoareTripleChecker+Valid, 3367 SdHoareTripleChecker+Invalid, 8139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.14ms SdHoareTripleChecker+Time, 1287 IncrementalHoareTripleChecker+Valid, 6846 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21338.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:56,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4778 Valid, 3367 Invalid, 8139 Unknown, 0 Unchecked, 39.14ms Time], IncrementalHoareTripleChecker [1287 Valid, 6846 Invalid, 6 Unknown, 0 Unchecked, 21338.40ms Time] [2021-11-12 23:16:56,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21417 states. [2021-11-12 23:16:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21417 to 21131. [2021-11-12 23:16:58,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21131 states, 15941 states have (on average 1.613010476130732) internal successors, (25713), 16833 states have internal predecessors, (25713), 4016 states have call successors, (4016), 861 states have call predecessors, (4016), 1173 states have return successors, (5515), 3711 states have call predecessors, (5515), 4011 states have call successors, (5515) [2021-11-12 23:16:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21131 states to 21131 states and 35244 transitions. [2021-11-12 23:16:58,708 INFO L78 Accepts]: Start accepts. Automaton has 21131 states and 35244 transitions. Word has length 109 [2021-11-12 23:16:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:58,708 INFO L470 AbstractCegarLoop]: Abstraction has 21131 states and 35244 transitions. [2021-11-12 23:16:58,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 12 states have internal predecessors, (135), 7 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (22), 9 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 23:16:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 21131 states and 35244 transitions. [2021-11-12 23:16:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:16:58,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:58,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:58,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-12 23:16:58,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:58,927 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:58,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:58,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2030534573, now seen corresponding path program 1 times [2021-11-12 23:16:58,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:58,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614037076] [2021-11-12 23:16:58,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:58,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:58,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:58,930 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:58,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:16:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:59,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:16:59,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:59,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:00,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:00,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614037076] [2021-11-12 23:17:00,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614037076] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:00,229 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:00,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:17:00,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989618622] [2021-11-12 23:17:00,230 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:00,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:17:00,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:00,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:17:00,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:17:00,232 INFO L87 Difference]: Start difference. First operand 21131 states and 35244 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:17:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:02,223 INFO L93 Difference]: Finished difference Result 43108 states and 73118 transitions. [2021-11-12 23:17:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:17:02,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 116 [2021-11-12 23:17:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:02,398 INFO L225 Difference]: With dead ends: 43108 [2021-11-12 23:17:02,398 INFO L226 Difference]: Without dead ends: 21131 [2021-11-12 23:17:02,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:17:02,526 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 360 mSDsluCounter, 1586 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 2447 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.43ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:02,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 2447 Invalid, 107 Unknown, 0 Unchecked, 3.43ms Time], IncrementalHoareTripleChecker [28 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 107.01ms Time] [2021-11-12 23:17:02,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21131 states. [2021-11-12 23:17:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21131 to 21131. [2021-11-12 23:17:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21131 states, 15941 states have (on average 1.5906781255881062) internal successors, (25357), 16833 states have internal predecessors, (25357), 4016 states have call successors, (4016), 861 states have call predecessors, (4016), 1173 states have return successors, (5515), 3711 states have call predecessors, (5515), 4011 states have call successors, (5515) [2021-11-12 23:17:04,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21131 states to 21131 states and 34888 transitions. [2021-11-12 23:17:04,670 INFO L78 Accepts]: Start accepts. Automaton has 21131 states and 34888 transitions. Word has length 116 [2021-11-12 23:17:04,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:04,671 INFO L470 AbstractCegarLoop]: Abstraction has 21131 states and 34888 transitions. [2021-11-12 23:17:04,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:17:04,671 INFO L276 IsEmpty]: Start isEmpty. Operand 21131 states and 34888 transitions. [2021-11-12 23:17:04,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 23:17:04,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:04,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:04,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:04,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:04,891 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:04,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash 875172171, now seen corresponding path program 1 times [2021-11-12 23:17:04,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:04,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526535807] [2021-11-12 23:17:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:04,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:04,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:04,895 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:04,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:17:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:05,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:17:05,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:17:06,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:17:06,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:06,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526535807] [2021-11-12 23:17:06,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526535807] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:06,885 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:06,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-12 23:17:06,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104821247] [2021-11-12 23:17:06,886 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:06,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:17:06,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:06,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:17:06,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:17:06,888 INFO L87 Difference]: Start difference. First operand 21131 states and 34888 transitions. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 6 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (22), 6 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-12 23:17:08,924 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:10,931 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:17,026 INFO L93 Difference]: Finished difference Result 43766 states and 72862 transitions. [2021-11-12 23:17:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:17:17,026 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 6 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (22), 6 states have call predecessors, (22), 5 states have call successors, (22) Word has length 121 [2021-11-12 23:17:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:17,193 INFO L225 Difference]: With dead ends: 43766 [2021-11-12 23:17:17,194 INFO L226 Difference]: Without dead ends: 23718 [2021-11-12 23:17:17,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:17:17,292 INFO L933 BasicCegarLoop]: 832 mSDtfsCounter, 2756 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 2760 mSolverCounterSat, 691 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7699.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2827 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 3453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.54ms SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 2760 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8290.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:17,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2827 Valid, 2082 Invalid, 3453 Unknown, 0 Unchecked, 20.54ms Time], IncrementalHoareTripleChecker [691 Valid, 2760 Invalid, 2 Unknown, 0 Unchecked, 8290.08ms Time] [2021-11-12 23:17:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23718 states. [2021-11-12 23:17:19,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23718 to 22115. [2021-11-12 23:17:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22115 states, 16673 states have (on average 1.5762610208120913) internal successors, (26281), 17625 states have internal predecessors, (26281), 4094 states have call successors, (4094), 969 states have call predecessors, (4094), 1347 states have return successors, (5761), 3795 states have call predecessors, (5761), 4089 states have call successors, (5761) [2021-11-12 23:17:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22115 states to 22115 states and 36136 transitions. [2021-11-12 23:17:19,449 INFO L78 Accepts]: Start accepts. Automaton has 22115 states and 36136 transitions. Word has length 121 [2021-11-12 23:17:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:19,450 INFO L470 AbstractCegarLoop]: Abstraction has 22115 states and 36136 transitions. [2021-11-12 23:17:19,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 6 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (22), 6 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-12 23:17:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 22115 states and 36136 transitions. [2021-11-12 23:17:19,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 23:17:19,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:19,459 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:17:19,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:19,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:19,679 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1977433414, now seen corresponding path program 1 times [2021-11-12 23:17:19,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:19,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824272830] [2021-11-12 23:17:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:19,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:19,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:19,684 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:19,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:17:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:20,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:17:20,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:17:20,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:17:21,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:21,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824272830] [2021-11-12 23:17:21,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824272830] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:21,698 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:21,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 23:17:21,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097159180] [2021-11-12 23:17:21,699 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:21,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:17:21,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:17:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:17:21,704 INFO L87 Difference]: Start difference. First operand 22115 states and 36136 transitions. Second operand has 9 states, 9 states have (on average 17.11111111111111) internal successors, (154), 9 states have internal predecessors, (154), 6 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (25), 8 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-12 23:17:23,731 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:25,738 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:32,446 INFO L93 Difference]: Finished difference Result 61939 states and 104043 transitions. [2021-11-12 23:17:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:17:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.11111111111111) internal successors, (154), 9 states have internal predecessors, (154), 6 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (25), 8 states have call predecessors, (25), 5 states have call successors, (25) Word has length 126 [2021-11-12 23:17:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:32,724 INFO L225 Difference]: With dead ends: 61939 [2021-11-12 23:17:32,724 INFO L226 Difference]: Without dead ends: 39869 [2021-11-12 23:17:32,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:17:32,877 INFO L933 BasicCegarLoop]: 1659 mSDtfsCounter, 4089 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 1262 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7258.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4182 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 3581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.13ms SdHoareTripleChecker+Time, 1262 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7829.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:32,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4182 Valid, 2757 Invalid, 3581 Unknown, 0 Unchecked, 21.13ms Time], IncrementalHoareTripleChecker [1262 Valid, 2317 Invalid, 2 Unknown, 0 Unchecked, 7829.79ms Time] [2021-11-12 23:17:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39869 states. [2021-11-12 23:17:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39869 to 39116. [2021-11-12 23:17:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39116 states, 28465 states have (on average 1.5636746882135957) internal successors, (44510), 30432 states have internal predecessors, (44510), 8451 states have call successors, (8451), 1521 states have call predecessors, (8451), 2199 states have return successors, (11558), 8087 states have call predecessors, (11558), 8446 states have call successors, (11558) [2021-11-12 23:17:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39116 states to 39116 states and 64519 transitions. [2021-11-12 23:17:36,444 INFO L78 Accepts]: Start accepts. Automaton has 39116 states and 64519 transitions. Word has length 126 [2021-11-12 23:17:36,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:36,446 INFO L470 AbstractCegarLoop]: Abstraction has 39116 states and 64519 transitions. [2021-11-12 23:17:36,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.11111111111111) internal successors, (154), 9 states have internal predecessors, (154), 6 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (25), 8 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-12 23:17:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 39116 states and 64519 transitions. [2021-11-12 23:17:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:17:36,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:36,454 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:17:36,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:36,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:36,667 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1743017051, now seen corresponding path program 1 times [2021-11-12 23:17:36,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:36,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39014047] [2021-11-12 23:17:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:36,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:36,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:36,670 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:36,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:17:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:17:37,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:17:37,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:17:38,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:38,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39014047] [2021-11-12 23:17:38,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39014047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:38,384 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:38,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 23:17:38,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625118451] [2021-11-12 23:17:38,385 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:38,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:17:38,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:38,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:17:38,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:17:38,387 INFO L87 Difference]: Start difference. First operand 39116 states and 64519 transitions. Second operand has 9 states, 9 states have (on average 17.22222222222222) internal successors, (155), 9 states have internal predecessors, (155), 6 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (25), 8 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-12 23:17:40,413 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:42,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:44,427 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:56,582 INFO L93 Difference]: Finished difference Result 124365 states and 211999 transitions. [2021-11-12 23:17:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:17:56,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.22222222222222) internal successors, (155), 9 states have internal predecessors, (155), 6 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (25), 8 states have call predecessors, (25), 5 states have call successors, (25) Word has length 127 [2021-11-12 23:17:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:57,207 INFO L225 Difference]: With dead ends: 124365 [2021-11-12 23:17:57,208 INFO L226 Difference]: Without dead ends: 85294 [2021-11-12 23:17:57,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:17:57,597 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 2898 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 3052 mSolverCounterSat, 918 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9890.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2991 SdHoareTripleChecker+Valid, 3174 SdHoareTripleChecker+Invalid, 3973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.33ms SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 3052 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10553.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:57,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2991 Valid, 3174 Invalid, 3973 Unknown, 0 Unchecked, 25.33ms Time], IncrementalHoareTripleChecker [918 Valid, 3052 Invalid, 3 Unknown, 0 Unchecked, 10553.43ms Time] [2021-11-12 23:17:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85294 states. [2021-11-12 23:18:05,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85294 to 83805. [2021-11-12 23:18:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83805 states, 57888 states have (on average 1.5476782752902156) internal successors, (89592), 62803 states have internal predecessors, (89592), 21767 states have call successors, (21767), 2625 states have call predecessors, (21767), 4149 states have return successors, (29761), 21526 states have call predecessors, (29761), 21762 states have call successors, (29761) [2021-11-12 23:18:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83805 states to 83805 states and 141120 transitions. [2021-11-12 23:18:06,443 INFO L78 Accepts]: Start accepts. Automaton has 83805 states and 141120 transitions. Word has length 127 [2021-11-12 23:18:06,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:06,444 INFO L470 AbstractCegarLoop]: Abstraction has 83805 states and 141120 transitions. [2021-11-12 23:18:06,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.22222222222222) internal successors, (155), 9 states have internal predecessors, (155), 6 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (25), 8 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-12 23:18:06,444 INFO L276 IsEmpty]: Start isEmpty. Operand 83805 states and 141120 transitions. [2021-11-12 23:18:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 23:18:06,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:06,452 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:18:06,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:06,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:18:06,678 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:06,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:06,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1419542358, now seen corresponding path program 1 times [2021-11-12 23:18:06,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:06,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109209531] [2021-11-12 23:18:06,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:06,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:06,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:06,682 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:06,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34b6addc-a9e9-4872-b24a-09f6623315cd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:18:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:07,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:18:07,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:18:07,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:18:08,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:08,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109209531] [2021-11-12 23:18:08,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109209531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:18:08,517 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:18:08,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 23:18:08,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479980884] [2021-11-12 23:18:08,518 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:18:08,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:18:08,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:08,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:18:08,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:18:08,520 INFO L87 Difference]: Start difference. First operand 83805 states and 141120 transitions. Second operand has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 6 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (25), 8 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-12 23:18:10,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []