./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.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_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/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_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/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_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:29:01,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:29:01,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:29:01,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:29:01,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:29:01,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:29:01,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:29:01,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:29:01,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:29:01,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:29:01,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:29:01,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:29:01,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:29:01,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:29:01,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:29:01,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:29:01,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:29:01,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:29:01,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:29:01,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:29:01,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:29:01,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:29:01,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:29:01,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:29:01,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:29:01,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:29:01,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:29:01,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:29:01,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:29:01,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:29:01,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:29:01,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:29:01,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:29:01,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:29:01,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:29:01,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:29:01,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:29:01,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:29:01,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:29:01,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:29:01,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:29:01,143 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:29:01,186 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:29:01,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:29:01,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:29:01,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:29:01,188 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:29:01,189 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:29:01,189 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:29:01,189 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:29:01,195 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:29:01,196 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:29:01,196 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:29:01,196 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:29:01,196 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:29:01,197 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:29:01,197 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:29:01,197 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:29:01,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:29:01,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:29:01,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:29:01,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:29:01,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:29:01,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:29:01,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:29:01,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:29:01,200 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:29:01,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:29:01,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:29:01,201 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:29:01,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:29:01,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:29:01,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:29:01,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:01,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:29:01,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:29:01,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:29:01,204 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:29:01,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:29:01,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:29:01,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:29:01,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:29:01,205 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_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc [2021-11-12 22:29:01,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:29:01,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:29:01,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:29:01,487 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:29:01,488 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:29:01,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-11-12 22:29:01,578 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/data/0571a776b/469dcf37ccc04e14b747446d7f384040/FLAG7d236669c [2021-11-12 22:29:02,045 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:29:02,046 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-11-12 22:29:02,054 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/data/0571a776b/469dcf37ccc04e14b747446d7f384040/FLAG7d236669c [2021-11-12 22:29:02,424 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/data/0571a776b/469dcf37ccc04e14b747446d7f384040 [2021-11-12 22:29:02,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:29:02,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:29:02,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:02,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:29:02,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:29:02,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:02" (1/1) ... [2021-11-12 22:29:02,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161f77f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02, skipping insertion in model container [2021-11-12 22:29:02,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:02" (1/1) ... [2021-11-12 22:29:02,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:29:02,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:29:02,695 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_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2021-11-12 22:29:02,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:02,711 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 22:29:02,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@52bdaef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02, skipping insertion in model container [2021-11-12 22:29:02,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:02,712 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:29:02,714 INFO L158 Benchmark]: Toolchain (without parser) took 285.45ms. Allocated memory was 90.2MB in the beginning and 134.2MB in the end (delta: 44.0MB). Free memory was 54.9MB in the beginning and 110.2MB in the end (delta: -55.3MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2021-11-12 22:29:02,715 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 90.2MB. Free memory was 61.9MB in the beginning and 61.9MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:29:02,716 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.57ms. Allocated memory was 90.2MB in the beginning and 134.2MB in the end (delta: 44.0MB). Free memory was 54.7MB in the beginning and 110.2MB in the end (delta: -55.5MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2021-11-12 22:29:02,718 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 90.2MB. Free memory was 61.9MB in the beginning and 61.9MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.57ms. Allocated memory was 90.2MB in the beginning and 134.2MB in the end (delta: 44.0MB). Free memory was 54.7MB in the beginning and 110.2MB in the end (delta: -55.5MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: 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_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/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_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/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_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:29:04,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:29:04,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:29:04,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:29:04,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:29:05,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:29:05,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:29:05,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:29:05,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:29:05,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:29:05,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:29:05,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:29:05,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:29:05,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:29:05,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:29:05,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:29:05,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:29:05,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:29:05,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:29:05,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:29:05,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:29:05,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:29:05,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:29:05,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:29:05,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:29:05,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:29:05,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:29:05,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:29:05,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:29:05,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:29:05,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:29:05,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:29:05,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:29:05,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:29:05,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:29:05,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:29:05,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:29:05,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:29:05,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:29:05,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:29:05,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:29:05,081 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:29:05,147 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:29:05,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:29:05,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:29:05,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:29:05,149 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:29:05,149 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:29:05,150 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:29:05,150 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:29:05,150 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:29:05,150 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:29:05,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:29:05,153 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:29:05,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:29:05,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:29:05,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:29:05,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:29:05,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:29:05,154 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:29:05,154 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:29:05,155 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:29:05,155 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:29:05,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:29:05,155 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:29:05,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:29:05,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:29:05,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:29:05,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:29:05,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:05,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:29:05,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:29:05,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:29:05,157 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:29:05,158 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:05,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:29:05,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:29:05,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:29:05,159 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_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc [2021-11-12 22:29:05,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:29:05,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:29:05,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:29:05,566 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:29:05,567 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:29:05,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-11-12 22:29:05,651 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/data/bba6be8d9/e93ffc15c39c435c990856c632bdf56a/FLAG13044803f [2021-11-12 22:29:06,201 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:29:06,203 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-11-12 22:29:06,212 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/data/bba6be8d9/e93ffc15c39c435c990856c632bdf56a/FLAG13044803f [2021-11-12 22:29:06,560 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/data/bba6be8d9/e93ffc15c39c435c990856c632bdf56a [2021-11-12 22:29:06,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:29:06,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:29:06,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:06,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:29:06,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:29:06,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:06,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a420aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06, skipping insertion in model container [2021-11-12 22:29:06,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:06,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:29:06,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:29:06,798 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_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2021-11-12 22:29:06,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:06,836 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:29:06,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:29:06,875 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_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2021-11-12 22:29:06,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:06,887 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:29:06,914 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_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2021-11-12 22:29:06,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:06,940 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:29:06,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06 WrapperNode [2021-11-12 22:29:06,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:06,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:06,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:29:06,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:29:06,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:06,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:06,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:06,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:29:06,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:29:06,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:29:07,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:07,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:07,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:07,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:07,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:07,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:07,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:07,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:29:07,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:29:07,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:29:07,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:29:07,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:07,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:07,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:07,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:29:07,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:29:07,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:29:07,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:29:07,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:29:07,119 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-12 22:29:07,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-12 22:29:07,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-12 22:29:07,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-12 22:29:07,121 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-12 22:29:07,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-12 22:29:07,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-12 22:29:07,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-12 22:29:07,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:29:07,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:29:07,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:29:07,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:29:07,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:29:07,124 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-12 22:29:07,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:29:07,808 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-12 22:29:07,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:07 BoogieIcfgContainer [2021-11-12 22:29:07,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:29:07,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:29:07,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:29:07,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:29:07,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:29:06" (1/3) ... [2021-11-12 22:29:07,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd4e5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:07, skipping insertion in model container [2021-11-12 22:29:07,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06" (2/3) ... [2021-11-12 22:29:07,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd4e5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:07, skipping insertion in model container [2021-11-12 22:29:07,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:07" (3/3) ... [2021-11-12 22:29:07,821 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2021-11-12 22:29:07,827 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-12 22:29:07,827 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:29:07,828 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:29:07,828 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-12 22:29:07,889 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,889 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,890 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,890 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,890 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,891 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,891 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,891 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,891 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,892 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,892 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,893 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,894 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,894 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,895 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,896 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,896 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,896 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,897 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,898 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,898 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,898 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,899 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,899 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,900 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,900 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,900 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,901 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,901 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,901 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,901 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,902 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,903 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,904 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,904 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,904 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,905 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,905 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,905 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,905 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,905 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,906 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,907 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,908 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,908 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,908 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,909 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,909 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,909 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,909 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,909 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,910 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,910 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,910 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,910 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,911 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,911 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,911 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,911 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,941 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,942 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,942 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,942 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,944 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,945 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,947 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,948 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,948 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,948 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,948 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,949 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,949 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,949 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,950 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,957 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,966 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,967 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,967 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,967 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,968 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,968 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,968 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,968 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,969 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,969 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,970 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,970 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,970 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,970 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,970 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:29:07,972 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-12 22:29:08,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:29:08,042 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 22:29:08,043 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-12 22:29:08,064 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-12 22:29:08,080 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 185 transitions, 394 flow [2021-11-12 22:29:08,083 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 185 transitions, 394 flow [2021-11-12 22:29:08,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 179 places, 185 transitions, 394 flow [2021-11-12 22:29:08,182 INFO L129 PetriNetUnfolder]: 16/182 cut-off events. [2021-11-12 22:29:08,182 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-12 22:29:08,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 182 events. 16/182 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 116 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 141. Up to 3 conditions per place. [2021-11-12 22:29:08,196 INFO L116 LiptonReduction]: Number of co-enabled transitions 1720 [2021-11-12 22:29:26,511 INFO L131 LiptonReduction]: Checked pairs total: 2405 [2021-11-12 22:29:26,512 INFO L133 LiptonReduction]: Total number of compositions: 183 [2021-11-12 22:29:26,520 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 90 flow [2021-11-12 22:29:26,543 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 172 states, 171 states have (on average 3.3567251461988303) internal successors, (574), 171 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 172 states, 171 states have (on average 3.3567251461988303) internal successors, (574), 171 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:26,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:26,558 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] [2021-11-12 22:29:26,559 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:26,564 INFO L85 PathProgramCache]: Analyzing trace with hash -611292219, now seen corresponding path program 1 times [2021-11-12 22:29:26,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:26,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034071276] [2021-11-12 22:29:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:26,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:26,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:26,593 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:26,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:29:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:26,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:26,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:27,399 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 22:29:27,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:27,602 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:27,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034071276] [2021-11-12 22:29:27,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034071276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:27,603 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:27,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-12 22:29:27,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706967378] [2021-11-12 22:29:27,605 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:27,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:29:27,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:27,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:29:27,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:29:27,632 INFO L87 Difference]: Start difference. First operand has 172 states, 171 states have (on average 3.3567251461988303) internal successors, (574), 171 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:28,303 INFO L93 Difference]: Finished difference Result 447 states and 1505 transitions. [2021-11-12 22:29:28,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:29:28,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-12 22:29:28,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:28,324 INFO L225 Difference]: With dead ends: 447 [2021-11-12 22:29:28,325 INFO L226 Difference]: Without dead ends: 428 [2021-11-12 22:29:28,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:29:28,329 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 75 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 536.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.08ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 603.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:28,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 22 Invalid, 172 Unknown, 0 Unchecked, 4.08ms Time], IncrementalHoareTripleChecker [1 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 603.29ms Time] [2021-11-12 22:29:28,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-12 22:29:28,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 268. [2021-11-12 22:29:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.4307116104868913) internal successors, (916), 267 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 916 transitions. [2021-11-12 22:29:28,411 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 916 transitions. Word has length 21 [2021-11-12 22:29:28,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:28,412 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 916 transitions. [2021-11-12 22:29:28,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:28,412 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 916 transitions. [2021-11-12 22:29:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:28,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:28,416 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] [2021-11-12 22:29:28,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:28,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:28,629 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:28,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:28,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1079592800, now seen corresponding path program 1 times [2021-11-12 22:29:28,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:28,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214094219] [2021-11-12 22:29:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:28,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:28,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:28,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:28,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:29:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:29:28,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:28,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:29,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:29,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214094219] [2021-11-12 22:29:29,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214094219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:29,039 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:29,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-12 22:29:29,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206995359] [2021-11-12 22:29:29,039 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:29,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:29:29,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:29,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:29:29,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:29:29,041 INFO L87 Difference]: Start difference. First operand 268 states and 916 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:29,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:29,789 INFO L93 Difference]: Finished difference Result 512 states and 1771 transitions. [2021-11-12 22:29:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:29:29,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 22:29:29,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:29,797 INFO L225 Difference]: With dead ends: 512 [2021-11-12 22:29:29,797 INFO L226 Difference]: Without dead ends: 510 [2021-11-12 22:29:29,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:29:29,799 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 149 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 546.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.82ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 625.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:29,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 29 Invalid, 273 Unknown, 0 Unchecked, 3.82ms Time], IncrementalHoareTripleChecker [16 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 625.37ms Time] [2021-11-12 22:29:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-12 22:29:29,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 348. [2021-11-12 22:29:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.5244956772334293) internal successors, (1223), 347 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1223 transitions. [2021-11-12 22:29:29,842 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1223 transitions. Word has length 22 [2021-11-12 22:29:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:29,844 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1223 transitions. [2021-11-12 22:29:29,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1223 transitions. [2021-11-12 22:29:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:29,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:29,853 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] [2021-11-12 22:29:29,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:30,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:30,059 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:30,059 INFO L85 PathProgramCache]: Analyzing trace with hash 725493958, now seen corresponding path program 2 times [2021-11-12 22:29:30,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:30,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129158075] [2021-11-12 22:29:30,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:29:30,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:30,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:30,061 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:30,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:29:30,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:30,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:30,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:29:30,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:30,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:30,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:30,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129158075] [2021-11-12 22:29:30,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129158075] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:30,485 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:30,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-12 22:29:30,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549837760] [2021-11-12 22:29:30,485 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:30,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:29:30,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:30,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:29:30,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:29:30,487 INFO L87 Difference]: Start difference. First operand 348 states and 1223 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:31,422 INFO L93 Difference]: Finished difference Result 620 states and 2224 transitions. [2021-11-12 22:29:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:29:31,423 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 22:29:31,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:31,429 INFO L225 Difference]: With dead ends: 620 [2021-11-12 22:29:31,429 INFO L226 Difference]: Without dead ends: 544 [2021-11-12 22:29:31,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:29:31,431 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 116 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 679.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.17ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 796.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:31,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 34 Invalid, 322 Unknown, 0 Unchecked, 3.17ms Time], IncrementalHoareTripleChecker [18 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 796.72ms Time] [2021-11-12 22:29:31,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-12 22:29:31,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 360. [2021-11-12 22:29:31,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.7576601671309193) internal successors, (1349), 359 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:31,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1349 transitions. [2021-11-12 22:29:31,454 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1349 transitions. Word has length 22 [2021-11-12 22:29:31,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:31,454 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1349 transitions. [2021-11-12 22:29:31,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:31,455 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1349 transitions. [2021-11-12 22:29:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:31,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:31,457 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] [2021-11-12 22:29:31,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:31,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:31,668 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:31,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1879228164, now seen corresponding path program 3 times [2021-11-12 22:29:31,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:31,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660225839] [2021-11-12 22:29:31,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:29:31,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:31,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:31,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:31,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:29:31,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:29:31,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:31,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:29:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:32,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:32,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:32,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660225839] [2021-11-12 22:29:32,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660225839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:32,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1745298239] [2021-11-12 22:29:32,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:29:32,300 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:32,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:32,310 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:32,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-12 22:29:32,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:29:32,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:32,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:29:32,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:32,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:32,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1745298239] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:32,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:32,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 5] total 14 [2021-11-12 22:29:32,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873435207] [2021-11-12 22:29:32,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:32,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:29:32,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:32,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:29:32,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:29:32,876 INFO L87 Difference]: Start difference. First operand 360 states and 1349 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:33,332 INFO L93 Difference]: Finished difference Result 470 states and 1687 transitions. [2021-11-12 22:29:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:29:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 22:29:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:33,339 INFO L225 Difference]: With dead ends: 470 [2021-11-12 22:29:33,339 INFO L226 Difference]: Without dead ends: 470 [2021-11-12 22:29:33,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:29:33,347 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 341.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 394.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:33,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 16 Invalid, 155 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [6 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 394.84ms Time] [2021-11-12 22:29:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-12 22:29:33,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 392. [2021-11-12 22:29:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.7468030690537084) internal successors, (1465), 391 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1465 transitions. [2021-11-12 22:29:33,379 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1465 transitions. Word has length 22 [2021-11-12 22:29:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:33,379 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1465 transitions. [2021-11-12 22:29:33,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1465 transitions. [2021-11-12 22:29:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:33,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:33,384 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] [2021-11-12 22:29:33,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:33,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-12 22:29:33,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:33,797 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:33,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1291885548, now seen corresponding path program 4 times [2021-11-12 22:29:33,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:33,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95499394] [2021-11-12 22:29:33,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:29:33,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:33,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:33,799 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:33,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:29:33,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:29:33,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:33,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:29:33,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:34,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:34,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:34,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95499394] [2021-11-12 22:29:34,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95499394] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:34,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:29:34,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-12 22:29:34,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516508790] [2021-11-12 22:29:34,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:34,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:29:34,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:34,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:29:34,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:29:34,233 INFO L87 Difference]: Start difference. First operand 392 states and 1465 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:34,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:34,554 INFO L93 Difference]: Finished difference Result 668 states and 2408 transitions. [2021-11-12 22:29:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:29:34,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 22:29:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:34,561 INFO L225 Difference]: With dead ends: 668 [2021-11-12 22:29:34,561 INFO L226 Difference]: Without dead ends: 650 [2021-11-12 22:29:34,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:29:34,562 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 62 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 229.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 271.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:34,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 13 Invalid, 108 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [4 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 271.63ms Time] [2021-11-12 22:29:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-12 22:29:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 496. [2021-11-12 22:29:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.7434343434343433) internal successors, (1853), 495 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1853 transitions. [2021-11-12 22:29:34,589 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1853 transitions. Word has length 22 [2021-11-12 22:29:34,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:34,590 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 1853 transitions. [2021-11-12 22:29:34,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1853 transitions. [2021-11-12 22:29:34,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-12 22:29:34,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:34,593 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] [2021-11-12 22:29:34,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:34,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:34,804 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:34,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:34,805 INFO L85 PathProgramCache]: Analyzing trace with hash -253836712, now seen corresponding path program 1 times [2021-11-12 22:29:34,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:34,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664221441] [2021-11-12 22:29:34,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:34,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:34,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:34,806 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:34,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:29:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:34,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:29:34,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:34,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:35,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:35,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664221441] [2021-11-12 22:29:35,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664221441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:35,023 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:35,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 22:29:35,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768226625] [2021-11-12 22:29:35,023 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:35,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:29:35,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:35,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:29:35,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:29:35,025 INFO L87 Difference]: Start difference. First operand 496 states and 1853 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:35,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:35,306 INFO L93 Difference]: Finished difference Result 774 states and 2668 transitions. [2021-11-12 22:29:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:29:35,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-12 22:29:35,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:35,314 INFO L225 Difference]: With dead ends: 774 [2021-11-12 22:29:35,314 INFO L226 Difference]: Without dead ends: 734 [2021-11-12 22:29:35,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:29:35,315 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 65 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 234.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.18ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 267.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:35,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 11 Invalid, 108 Unknown, 0 Unchecked, 1.18ms Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 267.80ms Time] [2021-11-12 22:29:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-12 22:29:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 562. [2021-11-12 22:29:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 3.5418894830659537) internal successors, (1987), 561 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1987 transitions. [2021-11-12 22:29:35,344 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1987 transitions. Word has length 23 [2021-11-12 22:29:35,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:35,345 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1987 transitions. [2021-11-12 22:29:35,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1987 transitions. [2021-11-12 22:29:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 22:29:35,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:35,348 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] [2021-11-12 22:29:35,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:35,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:35,563 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:35,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1577211143, now seen corresponding path program 1 times [2021-11-12 22:29:35,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:35,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883587668] [2021-11-12 22:29:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:35,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:35,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:35,565 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:35,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:29:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:35,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:29:35,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:29:35,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:29:36,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:36,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883587668] [2021-11-12 22:29:36,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883587668] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:36,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [930009270] [2021-11-12 22:29:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:36,028 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:36,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:36,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:36,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 22:29:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:36,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:29:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:29:36,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:29:36,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [930009270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:36,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745863923] [2021-11-12 22:29:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:36,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:36,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:36,482 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:36,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 22:29:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:36,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:29:36,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:29:36,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:29:36,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745863923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:36,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:29:36,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 18 [2021-11-12 22:29:36,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084944064] [2021-11-12 22:29:36,862 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:29:36,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:29:36,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:36,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:29:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:29:36,865 INFO L87 Difference]: Start difference. First operand 562 states and 1987 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:39,724 INFO L93 Difference]: Finished difference Result 1821 states and 6161 transitions. [2021-11-12 22:29:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-12 22:29:39,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 22:29:39,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:39,738 INFO L225 Difference]: With dead ends: 1821 [2021-11-12 22:29:39,739 INFO L226 Difference]: Without dead ends: 1575 [2021-11-12 22:29:39,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=563, Invalid=1987, Unknown=0, NotChecked=0, Total=2550 [2021-11-12 22:29:39,741 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 576 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1582.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.62ms SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1892.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:39,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 96 Invalid, 1114 Unknown, 0 Unchecked, 9.62ms Time], IncrementalHoareTripleChecker [130 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 1892.15ms Time] [2021-11-12 22:29:39,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-11-12 22:29:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 571. [2021-11-12 22:29:39,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 3.4842105263157896) internal successors, (1986), 570 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1986 transitions. [2021-11-12 22:29:39,781 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1986 transitions. Word has length 24 [2021-11-12 22:29:39,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:39,782 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 1986 transitions. [2021-11-12 22:29:39,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1986 transitions. [2021-11-12 22:29:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-12 22:29:39,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:39,785 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] [2021-11-12 22:29:39,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:39,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:40,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:40,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:40,387 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:40,388 INFO L85 PathProgramCache]: Analyzing trace with hash 158511730, now seen corresponding path program 1 times [2021-11-12 22:29:40,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:40,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007484861] [2021-11-12 22:29:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:40,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:40,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:40,389 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:40,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:29:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:29:40,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:40,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:40,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:40,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007484861] [2021-11-12 22:29:40,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007484861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:40,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1099874708] [2021-11-12 22:29:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:40,594 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:40,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:40,595 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:40,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 22:29:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:40,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:29:40,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:40,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:40,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1099874708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:40,918 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:29:40,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 13 [2021-11-12 22:29:40,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127086239] [2021-11-12 22:29:40,918 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:40,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:40,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:40,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:40,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:29:40,919 INFO L87 Difference]: Start difference. First operand 571 states and 1986 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:41,239 INFO L93 Difference]: Finished difference Result 507 states and 1749 transitions. [2021-11-12 22:29:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:29:41,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-12 22:29:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:41,244 INFO L225 Difference]: With dead ends: 507 [2021-11-12 22:29:41,244 INFO L226 Difference]: Without dead ends: 481 [2021-11-12 22:29:41,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:29:41,245 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 253.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 292.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:41,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 26 Invalid, 173 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 292.37ms Time] [2021-11-12 22:29:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-12 22:29:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 481. [2021-11-12 22:29:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.5375) internal successors, (1698), 480 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1698 transitions. [2021-11-12 22:29:41,265 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1698 transitions. Word has length 25 [2021-11-12 22:29:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:41,266 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1698 transitions. [2021-11-12 22:29:41,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:41,266 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1698 transitions. [2021-11-12 22:29:41,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-12 22:29:41,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:41,268 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] [2021-11-12 22:29:41,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-12 22:29:41,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:41,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:41,680 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:41,680 INFO L85 PathProgramCache]: Analyzing trace with hash 48957042, now seen corresponding path program 1 times [2021-11-12 22:29:41,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:41,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434601927] [2021-11-12 22:29:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:41,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:41,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:41,682 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:41,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:29:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:41,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:29:41,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:29:41,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:29:41,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:41,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434601927] [2021-11-12 22:29:41,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434601927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:41,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [154518772] [2021-11-12 22:29:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:41,927 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:41,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:41,928 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:41,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 22:29:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:42,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:29:42,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:29:42,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:29:42,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [154518772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:42,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51447944] [2021-11-12 22:29:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:42,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:42,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:42,190 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:42,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 22:29:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:42,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:29:42,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:29:42,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:29:42,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51447944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:42,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:29:42,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-12 22:29:42,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626330745] [2021-11-12 22:29:42,376 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:29:42,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:29:42,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:29:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:29:42,378 INFO L87 Difference]: Start difference. First operand 481 states and 1698 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:42,736 INFO L93 Difference]: Finished difference Result 729 states and 2545 transitions. [2021-11-12 22:29:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:42,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-12 22:29:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:42,742 INFO L225 Difference]: With dead ends: 729 [2021-11-12 22:29:42,742 INFO L226 Difference]: Without dead ends: 673 [2021-11-12 22:29:42,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:29:42,743 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 294.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.25ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 338.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:42,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 26 Invalid, 237 Unknown, 0 Unchecked, 1.25ms Time], IncrementalHoareTripleChecker [3 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 338.30ms Time] [2021-11-12 22:29:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-11-12 22:29:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 585. [2021-11-12 22:29:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.5273972602739727) internal successors, (2060), 584 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 2060 transitions. [2021-11-12 22:29:42,767 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 2060 transitions. Word has length 28 [2021-11-12 22:29:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:42,768 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 2060 transitions. [2021-11-12 22:29:42,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 2060 transitions. [2021-11-12 22:29:42,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-12 22:29:42,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:42,771 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] [2021-11-12 22:29:42,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:42,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-12 22:29:43,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-12 22:29:43,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:43,373 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:43,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1287136326, now seen corresponding path program 2 times [2021-11-12 22:29:43,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:43,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896599627] [2021-11-12 22:29:43,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:29:43,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:43,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:43,376 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:43,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:29:43,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:43,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:43,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:43,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:29:43,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:29:43,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:43,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896599627] [2021-11-12 22:29:43,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896599627] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:43,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [370680948] [2021-11-12 22:29:43,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:29:43,874 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:43,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:43,875 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:43,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 22:29:44,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:44,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:44,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:29:44,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:29:44,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:29:44,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [370680948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:44,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651209152] [2021-11-12 22:29:44,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:29:44,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:44,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:44,511 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:44,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-12 22:29:44,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:44,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:44,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:29:44,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:29:44,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:29:45,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651209152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:45,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:29:45,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 8, 8] total 29 [2021-11-12 22:29:45,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290876202] [2021-11-12 22:29:45,223 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:29:45,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-12 22:29:45,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-12 22:29:45,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:29:45,225 INFO L87 Difference]: Start difference. First operand 585 states and 2060 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:55,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:55,819 INFO L93 Difference]: Finished difference Result 1160 states and 4071 transitions. [2021-11-12 22:29:55,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-12 22:29:55,820 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-12 22:29:55,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:55,828 INFO L225 Difference]: With dead ends: 1160 [2021-11-12 22:29:55,828 INFO L226 Difference]: Without dead ends: 1020 [2021-11-12 22:29:55,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3573 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1659, Invalid=9471, Unknown=0, NotChecked=0, Total=11130 [2021-11-12 22:29:55,833 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 571 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4338.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.69ms SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4867.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:55,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 257 Invalid, 2155 Unknown, 0 Unchecked, 11.69ms Time], IncrementalHoareTripleChecker [126 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 4867.24ms Time] [2021-11-12 22:29:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-11-12 22:29:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 498. [2021-11-12 22:29:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.6116700201207244) internal successors, (1795), 497 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1795 transitions. [2021-11-12 22:29:55,858 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1795 transitions. Word has length 30 [2021-11-12 22:29:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:55,858 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1795 transitions. [2021-11-12 22:29:55,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1795 transitions. [2021-11-12 22:29:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:29:55,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:55,861 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] [2021-11-12 22:29:55,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:56,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-12 22:29:56,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:56,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:56,480 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash 169509139, now seen corresponding path program 3 times [2021-11-12 22:29:56,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:56,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917992831] [2021-11-12 22:29:56,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:29:56,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:56,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:56,482 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:56,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:29:56,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:29:56,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:56,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:29:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:29:56,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:29:57,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:57,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917992831] [2021-11-12 22:29:57,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917992831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:57,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [926880287] [2021-11-12 22:29:57,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:29:57,144 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:57,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:57,145 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:57,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 22:29:57,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:29:57,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:29:57,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:29:57,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:29:57,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [926880287] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:57,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252113216] [2021-11-12 22:29:57,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:29:57,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:57,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:57,707 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:57,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-12 22:29:57,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:29:57,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:57,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:29:57,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:29:58,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:29:58,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252113216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:58,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:29:58,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 8] total 24 [2021-11-12 22:29:58,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827897483] [2021-11-12 22:29:58,275 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:29:58,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 22:29:58,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:58,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 22:29:58,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:29:58,277 INFO L87 Difference]: Start difference. First operand 498 states and 1795 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:59,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:59,500 INFO L93 Difference]: Finished difference Result 1382 states and 4974 transitions. [2021-11-12 22:29:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:29:59,501 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-12 22:29:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:59,514 INFO L225 Difference]: With dead ends: 1382 [2021-11-12 22:29:59,515 INFO L226 Difference]: Without dead ends: 1382 [2021-11-12 22:29:59,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=353, Invalid=979, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 22:29:59,516 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 400 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 764.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 899.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:59,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 81 Invalid, 735 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [92 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 899.14ms Time] [2021-11-12 22:29:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-11-12 22:29:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 430. [2021-11-12 22:29:59,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.344988344988345) internal successors, (1435), 429 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1435 transitions. [2021-11-12 22:29:59,542 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1435 transitions. Word has length 32 [2021-11-12 22:29:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:59,542 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1435 transitions. [2021-11-12 22:29:59,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1435 transitions. [2021-11-12 22:29:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-12 22:29:59,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:59,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:59,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:59,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:59,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:00,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:00,157 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:30:00,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:00,157 INFO L85 PathProgramCache]: Analyzing trace with hash -994170406, now seen corresponding path program 4 times [2021-11-12 22:30:00,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:00,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343232794] [2021-11-12 22:30:00,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:30:00,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:00,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:00,159 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:00,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:30:00,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:30:00,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:30:00,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:30:00,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:30:00,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:30:00,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:00,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343232794] [2021-11-12 22:30:00,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343232794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:00,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1145165996] [2021-11-12 22:30:00,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:30:00,510 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:00,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:00,511 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:00,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 22:30:00,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:30:00,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:30:00,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:30:00,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:30:00,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:30:01,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1145165996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:01,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661768603] [2021-11-12 22:30:01,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:30:01,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:30:01,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:30:01,347 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:30:01,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-12 22:30:01,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:30:01,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:30:01,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:30:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:30:01,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:30:02,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661768603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:02,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:30:02,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 33 [2021-11-12 22:30:02,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875553191] [2021-11-12 22:30:02,091 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:30:02,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-12 22:30:02,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:02,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-12 22:30:02,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 22:30:02,092 INFO L87 Difference]: Start difference. First operand 430 states and 1435 transitions. Second operand has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:30:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:43,351 INFO L93 Difference]: Finished difference Result 6366 states and 21497 transitions. [2021-11-12 22:30:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 405 states. [2021-11-12 22:30:43,358 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-12 22:30:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:43,436 INFO L225 Difference]: With dead ends: 6366 [2021-11-12 22:30:43,436 INFO L226 Difference]: Without dead ends: 5618 [2021-11-12 22:30:43,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 431 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81386 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=15716, Invalid=171340, Unknown=0, NotChecked=0, Total=187056 [2021-11-12 22:30:43,458 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1566 mSDsluCounter, 3537 mSDsCounter, 0 mSdLazyCounter, 7661 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12804.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1566 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 8050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.22ms SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 7661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14200.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:43,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1566 Valid, 567 Invalid, 8050 Unknown, 0 Unchecked, 29.22ms Time], IncrementalHoareTripleChecker [389 Valid, 7661 Invalid, 0 Unknown, 0 Unchecked, 14200.13ms Time] [2021-11-12 22:30:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5618 states. [2021-11-12 22:30:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5618 to 2392. [2021-11-12 22:30:43,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 3.9247176913425346) internal successors, (9384), 2391 states have internal predecessors, (9384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:30:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 9384 transitions. [2021-11-12 22:30:43,648 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 9384 transitions. Word has length 34 [2021-11-12 22:30:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:43,648 INFO L470 AbstractCegarLoop]: Abstraction has 2392 states and 9384 transitions. [2021-11-12 22:30:43,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:30:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 9384 transitions. [2021-11-12 22:30:43,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:30:43,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:43,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:43,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:43,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:44,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-12 22:30:44,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:44,274 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:30:44,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:44,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1718062691, now seen corresponding path program 5 times [2021-11-12 22:30:44,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:44,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960398879] [2021-11-12 22:30:44,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:30:44,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:44,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:44,276 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:44,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:30:44,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 22:30:44,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:30:44,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:30:44,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:30:44,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:30:45,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:45,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960398879] [2021-11-12 22:30:45,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960398879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:45,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1463457105] [2021-11-12 22:30:45,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:30:45,018 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:45,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:45,023 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:45,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-12 22:30:57,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 22:30:57,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:30:57,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:30:57,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:30:57,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:30:57,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1463457105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:57,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31054411] [2021-11-12 22:30:57,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:30:57,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:30:57,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:30:57,543 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:30:57,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-12 22:31:05,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 22:31:05,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:31:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:31:05,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:31:05,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31054411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:05,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:31:05,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7, 7, 7, 7] total 19 [2021-11-12 22:31:05,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755437956] [2021-11-12 22:31:05,177 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:31:05,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 22:31:05,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:05,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 22:31:05,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:31:05,179 INFO L87 Difference]: Start difference. First operand 2392 states and 9384 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:31:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:07,198 INFO L93 Difference]: Finished difference Result 3564 states and 13628 transitions. [2021-11-12 22:31:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:31:07,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-12 22:31:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:07,221 INFO L225 Difference]: With dead ends: 3564 [2021-11-12 22:31:07,221 INFO L226 Difference]: Without dead ends: 3498 [2021-11-12 22:31:07,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:31:07,222 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 196 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1442.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.68ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1637.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:07,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 121 Invalid, 1030 Unknown, 0 Unchecked, 3.68ms Time], IncrementalHoareTripleChecker [13 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1637.20ms Time] [2021-11-12 22:31:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-11-12 22:31:07,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 2646. [2021-11-12 22:31:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2645 states have (on average 3.89413988657845) internal successors, (10300), 2645 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:31:07,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 10300 transitions. [2021-11-12 22:31:07,361 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 10300 transitions. Word has length 35 [2021-11-12 22:31:07,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:07,361 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 10300 transitions. [2021-11-12 22:31:07,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:31:07,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 10300 transitions. [2021-11-12 22:31:07,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:31:07,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:07,371 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:07,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:07,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-12 22:31:07,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-12 22:31:07,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:07,985 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:31:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:07,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1383966227, now seen corresponding path program 6 times [2021-11-12 22:31:07,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:07,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792636949] [2021-11-12 22:31:07,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:31:07,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:07,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:07,987 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:07,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:31:08,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 22:31:08,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:08,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:31:08,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:31:08,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:31:08,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:08,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792636949] [2021-11-12 22:31:08,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792636949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:08,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [894796760] [2021-11-12 22:31:08,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:31:08,400 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:08,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:08,415 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:08,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 22:31:08,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:31:08,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65083501] [2021-11-12 22:31:08,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:31:08,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 1 [2021-11-12 22:31:08,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:08,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:08,696 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:31:08,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-12 22:31:08,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 22:31:08,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:08,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:31:08,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:31:08,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:31:09,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65083501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:09,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:31:09,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 12 [2021-11-12 22:31:09,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951696713] [2021-11-12 22:31:09,086 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-12 22:31:09,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:31:09,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:31:09,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:31:09,088 INFO L87 Difference]: Start difference. First operand 2646 states and 10300 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:31:10,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:10,168 INFO L93 Difference]: Finished difference Result 3738 states and 14268 transitions. [2021-11-12 22:31:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:31:10,169 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-12 22:31:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:10,183 INFO L225 Difference]: With dead ends: 3738 [2021-11-12 22:31:10,184 INFO L226 Difference]: Without dead ends: 3672 [2021-11-12 22:31:10,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:31:10,185 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 841.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.03ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 956.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:10,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 62 Invalid, 597 Unknown, 0 Unchecked, 2.03ms Time], IncrementalHoareTripleChecker [6 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 956.34ms Time] [2021-11-12 22:31:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-11-12 22:31:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 2702. [2021-11-12 22:31:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 3.8859681599407625) internal successors, (10496), 2701 states have internal predecessors, (10496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:31:10,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 10496 transitions. [2021-11-12 22:31:10,430 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 10496 transitions. Word has length 35 [2021-11-12 22:31:10,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:10,431 INFO L470 AbstractCegarLoop]: Abstraction has 2702 states and 10496 transitions. [2021-11-12 22:31:10,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:31:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 10496 transitions. [2021-11-12 22:31:10,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 22:31:10,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:10,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:10,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:10,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-12 22:31:10,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:10,840 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:31:10,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:10,840 INFO L85 PathProgramCache]: Analyzing trace with hash 108846813, now seen corresponding path program 7 times [2021-11-12 22:31:10,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:10,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636194371] [2021-11-12 22:31:10,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:31:10,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:10,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:10,842 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:10,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 22:31:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:11,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:31:11,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:31:11,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:31:11,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:11,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636194371] [2021-11-12 22:31:11,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636194371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:11,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [121288706] [2021-11-12 22:31:11,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:31:11,309 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:11,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:11,311 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:11,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-12 22:31:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:11,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:31:11,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:31:11,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:31:11,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [121288706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:11,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189579937] [2021-11-12 22:31:11,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:31:11,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:11,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:11,662 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:31:11,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-12 22:31:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:11,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:31:11,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:31:11,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:31:11,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189579937] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:11,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:31:11,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-12 22:31:11,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122224717] [2021-11-12 22:31:11,961 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:31:11,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:31:11,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:11,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:31:11,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:31:11,962 INFO L87 Difference]: Start difference. First operand 2702 states and 10496 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:31:13,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:13,013 INFO L93 Difference]: Finished difference Result 3962 states and 15083 transitions. [2021-11-12 22:31:13,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:31:13,013 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-12 22:31:13,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:13,029 INFO L225 Difference]: With dead ends: 3962 [2021-11-12 22:31:13,029 INFO L226 Difference]: Without dead ends: 3896 [2021-11-12 22:31:13,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:31:13,030 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 806.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 910.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:13,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 63 Invalid, 573 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [11 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 910.48ms Time] [2021-11-12 22:31:13,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3896 states. [2021-11-12 22:31:13,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3896 to 2472. [2021-11-12 22:31:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 3.84581141238365) internal successors, (9503), 2471 states have internal predecessors, (9503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:31:13,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 9503 transitions. [2021-11-12 22:31:13,152 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 9503 transitions. Word has length 35 [2021-11-12 22:31:13,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:13,153 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 9503 transitions. [2021-11-12 22:31:13,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:31:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 9503 transitions. [2021-11-12 22:31:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-12 22:31:13,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:13,161 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:13,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:13,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:13,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:13,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:13,787 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:31:13,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:13,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1391352933, now seen corresponding path program 8 times [2021-11-12 22:31:13,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:13,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277262582] [2021-11-12 22:31:13,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:31:13,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:13,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:13,789 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:13,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 22:31:13,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:31:13,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:13,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:31:13,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:31:14,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:31:14,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:14,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277262582] [2021-11-12 22:31:14,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277262582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:14,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1219364435] [2021-11-12 22:31:14,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:31:14,508 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:14,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:14,509 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:14,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-12 22:31:14,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:31:14,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:14,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:31:14,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:31:14,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:31:15,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1219364435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:15,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060848891] [2021-11-12 22:31:15,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:31:15,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:15,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:15,131 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:31:15,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-12 22:31:15,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:31:15,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:15,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:31:15,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:31:15,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:31:17,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060848891] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:17,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:31:17,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 13, 13] total 41 [2021-11-12 22:31:17,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743694223] [2021-11-12 22:31:17,072 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:31:17,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-12 22:31:17,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:17,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-12 22:31:17,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2021-11-12 22:31:17,074 INFO L87 Difference]: Start difference. First operand 2472 states and 9503 transitions. Second operand has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:32:09,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:32:09,676 INFO L93 Difference]: Finished difference Result 4913 states and 19380 transitions. [2021-11-12 22:32:09,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-11-12 22:32:09,677 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-12 22:32:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:32:09,695 INFO L225 Difference]: With dead ends: 4913 [2021-11-12 22:32:09,695 INFO L226 Difference]: Without dead ends: 4188 [2021-11-12 22:32:09,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14794 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=6583, Invalid=35237, Unknown=0, NotChecked=0, Total=41820 [2021-11-12 22:32:09,701 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 857 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 3900 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8977.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 4223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.62ms SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 3900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9988.77ms IncrementalHoareTripleChecker+Time [2021-11-12 22:32:09,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 315 Invalid, 4223 Unknown, 0 Unchecked, 15.62ms Time], IncrementalHoareTripleChecker [323 Valid, 3900 Invalid, 0 Unknown, 0 Unchecked, 9988.77ms Time] [2021-11-12 22:32:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-11-12 22:32:09,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 1736. [2021-11-12 22:32:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 4.029394812680115) internal successors, (6991), 1735 states have internal predecessors, (6991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:32:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 6991 transitions. [2021-11-12 22:32:09,834 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 6991 transitions. Word has length 37 [2021-11-12 22:32:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:32:09,835 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 6991 transitions. [2021-11-12 22:32:09,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:32:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 6991 transitions. [2021-11-12 22:32:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-12 22:32:09,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:32:09,841 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:32:09,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:10,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:10,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-12 22:32:10,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:32:10,455 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:32:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:32:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash -210754080, now seen corresponding path program 9 times [2021-11-12 22:32:10,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:32:10,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734590097] [2021-11-12 22:32:10,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:32:10,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:32:10,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:32:10,457 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:32:10,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 22:32:10,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:32:10,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:10,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:32:10,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:32:11,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:32:11,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:32:11,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734590097] [2021-11-12 22:32:11,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734590097] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:11,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [634460918] [2021-11-12 22:32:11,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:32:11,621 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:32:11,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:32:11,622 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:32:11,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-12 22:32:12,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:32:12,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:12,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:32:12,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:32:12,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:32:12,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [634460918] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:12,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127839276] [2021-11-12 22:32:12,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:32:12,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:32:12,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:32:12,977 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:32:12,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-12 22:32:13,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:32:13,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:13,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:32:13,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:32:14,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:32:14,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127839276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:14,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:32:14,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 9, 9, 9] total 28 [2021-11-12 22:32:14,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956353091] [2021-11-12 22:32:14,866 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:32:14,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-12 22:32:14,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:32:14,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-12 22:32:14,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:32:14,867 INFO L87 Difference]: Start difference. First operand 1736 states and 6991 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:32:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:32:16,737 INFO L93 Difference]: Finished difference Result 7305 states and 29092 transitions. [2021-11-12 22:32:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 22:32:16,738 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-12 22:32:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:32:16,758 INFO L225 Difference]: With dead ends: 7305 [2021-11-12 22:32:16,758 INFO L226 Difference]: Without dead ends: 7281 [2021-11-12 22:32:16,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-11-12 22:32:16,759 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 458 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1090.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.91ms SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1250.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:32:16,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 90 Invalid, 796 Unknown, 0 Unchecked, 3.91ms Time], IncrementalHoareTripleChecker [92 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1250.52ms Time] [2021-11-12 22:32:16,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7281 states. [2021-11-12 22:32:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7281 to 4353. [2021-11-12 22:32:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 3.9942555147058822) internal successors, (17383), 4352 states have internal predecessors, (17383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:32:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 17383 transitions. [2021-11-12 22:32:16,990 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 17383 transitions. Word has length 39 [2021-11-12 22:32:16,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:32:16,991 INFO L470 AbstractCegarLoop]: Abstraction has 4353 states and 17383 transitions. [2021-11-12 22:32:16,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:32:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 17383 transitions. [2021-11-12 22:32:17,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-12 22:32:17,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:32:17,008 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:32:17,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:17,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-11-12 22:32:17,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-12 22:32:17,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:32:17,621 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:32:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:32:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash 740477671, now seen corresponding path program 10 times [2021-11-12 22:32:17,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:32:17,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63572735] [2021-11-12 22:32:17,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:32:17,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:32:17,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:32:17,623 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:32:17,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 22:32:17,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:32:17,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:17,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:32:17,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:32:18,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:32:18,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:32:18,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63572735] [2021-11-12 22:32:18,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63572735] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:18,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [983769811] [2021-11-12 22:32:18,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:32:18,808 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:32:18,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:32:18,809 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:32:18,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-12 22:32:18,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:32:18,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:18,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:32:18,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:32:19,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:32:19,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [983769811] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:19,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815955432] [2021-11-12 22:32:19,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:32:19,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:32:19,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:32:19,406 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:32:19,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-12 22:32:19,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:32:19,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:19,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:32:19,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:32:20,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:32:21,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815955432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:21,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:32:21,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 13, 13] total 45 [2021-11-12 22:32:21,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770195858] [2021-11-12 22:32:21,466 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:32:21,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-12 22:32:21,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:32:21,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-12 22:32:21,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1620, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 22:32:21,467 INFO L87 Difference]: Start difference. First operand 4353 states and 17383 transitions. Second operand has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:32:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:32:29,318 INFO L93 Difference]: Finished difference Result 7379 states and 28892 transitions. [2021-11-12 22:32:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-12 22:32:29,319 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-12 22:32:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:32:29,337 INFO L225 Difference]: With dead ends: 7379 [2021-11-12 22:32:29,337 INFO L226 Difference]: Without dead ends: 7379 [2021-11-12 22:32:29,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3736 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2539, Invalid=10801, Unknown=0, NotChecked=0, Total=13340 [2021-11-12 22:32:29,339 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 855 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3868.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.33ms SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4385.25ms IncrementalHoareTripleChecker+Time [2021-11-12 22:32:29,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 220 Invalid, 3010 Unknown, 0 Unchecked, 15.33ms Time], IncrementalHoareTripleChecker [241 Valid, 2769 Invalid, 0 Unknown, 0 Unchecked, 4385.25ms Time] [2021-11-12 22:32:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7379 states. [2021-11-12 22:32:29,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7379 to 3121. [2021-11-12 22:32:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 3120 states have (on average 3.8705128205128205) internal successors, (12076), 3120 states have internal predecessors, (12076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:32:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 12076 transitions. [2021-11-12 22:32:29,521 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 12076 transitions. Word has length 40 [2021-11-12 22:32:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:32:29,522 INFO L470 AbstractCegarLoop]: Abstraction has 3121 states and 12076 transitions. [2021-11-12 22:32:29,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:32:29,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 12076 transitions. [2021-11-12 22:32:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-12 22:32:29,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:32:29,533 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:32:29,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-12 22:32:29,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:29,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:30,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:32:30,147 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:32:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:32:30,147 INFO L85 PathProgramCache]: Analyzing trace with hash -921182708, now seen corresponding path program 11 times [2021-11-12 22:32:30,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:32:30,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65840974] [2021-11-12 22:32:30,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:32:30,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:32:30,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:32:30,149 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:32:30,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 22:32:30,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-12 22:32:30,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:30,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:32:30,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:32:30,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:32:30,750 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:32:30,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65840974] [2021-11-12 22:32:30,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65840974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:30,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1516877870] [2021-11-12 22:32:30,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:32:30,751 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:32:30,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:32:30,752 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:32:30,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-12 22:32:38,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-12 22:32:38,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:38,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:32:38,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:32:38,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:32:38,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1516877870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:38,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50339926] [2021-11-12 22:32:38,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:32:38,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:32:38,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:32:38,949 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:32:38,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-12 22:32:56,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-12 22:32:56,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:56,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:32:56,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:32:56,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:32:56,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50339926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:56,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:32:56,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 11, 12] total 35 [2021-11-12 22:32:56,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991682145] [2021-11-12 22:32:56,999 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:32:57,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-12 22:32:57,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:32:57,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-12 22:32:57,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-11-12 22:32:57,001 INFO L87 Difference]: Start difference. First operand 3121 states and 12076 transitions. Second operand has 35 states, 35 states have (on average 2.742857142857143) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:00,899 INFO L93 Difference]: Finished difference Result 24067 states and 89075 transitions. [2021-11-12 22:34:00,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 358 states. [2021-11-12 22:34:00,900 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.742857142857143) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-12 22:34:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:01,043 INFO L225 Difference]: With dead ends: 24067 [2021-11-12 22:34:01,043 INFO L226 Difference]: Without dead ends: 23201 [2021-11-12 22:34:01,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69137 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=16084, Invalid=135626, Unknown=0, NotChecked=0, Total=151710 [2021-11-12 22:34:01,055 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1909 mSDsluCounter, 3624 mSDsCounter, 0 mSdLazyCounter, 9063 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24063.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1909 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 9519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.04ms SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 9063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26324.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:01,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1909 Valid, 367 Invalid, 9519 Unknown, 0 Unchecked, 44.04ms Time], IncrementalHoareTripleChecker [456 Valid, 9063 Invalid, 0 Unknown, 0 Unchecked, 26324.21ms Time] [2021-11-12 22:34:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23201 states. [2021-11-12 22:34:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23201 to 5487. [2021-11-12 22:34:01,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5486 states have (on average 3.913233685745534) internal successors, (21468), 5486 states have internal predecessors, (21468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 21468 transitions. [2021-11-12 22:34:01,535 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 21468 transitions. Word has length 42 [2021-11-12 22:34:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:01,535 INFO L470 AbstractCegarLoop]: Abstraction has 5487 states and 21468 transitions. [2021-11-12 22:34:01,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.742857142857143) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 21468 transitions. [2021-11-12 22:34:01,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-12 22:34:01,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:01,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:01,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:01,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-11-12 22:34:01,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-12 22:34:02,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:02,167 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:34:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:02,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1049080676, now seen corresponding path program 12 times [2021-11-12 22:34:02,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:02,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659894785] [2021-11-12 22:34:02,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:34:02,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:02,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:02,169 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:02,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-12 22:34:02,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-12 22:34:02,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:34:02,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:34:02,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:34:02,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:34:03,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:03,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659894785] [2021-11-12 22:34:03,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659894785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:03,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1829665934] [2021-11-12 22:34:03,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:34:03,160 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:34:03,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:34:03,161 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:34:03,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-12 22:34:03,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:34:03,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027290164] [2021-11-12 22:34:03,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:34:03,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:03,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:34:03,395 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:34:03,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 1 [2021-11-12 22:34:03,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-12 22:34:04,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-12 22:34:04,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:34:04,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:34:04,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:34:04,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:34:05,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027290164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:05,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:34:05,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10, 12] total 40 [2021-11-12 22:34:05,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079233336] [2021-11-12 22:34:05,435 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-12 22:34:05,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-12 22:34:05,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:05,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-12 22:34:05,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2021-11-12 22:34:05,436 INFO L87 Difference]: Start difference. First operand 5487 states and 21468 transitions. Second operand has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:25,701 INFO L93 Difference]: Finished difference Result 43657 states and 163931 transitions. [2021-11-12 22:37:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 821 states. [2021-11-12 22:37:25,703 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-12 22:37:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:26,055 INFO L225 Difference]: With dead ends: 43657 [2021-11-12 22:37:26,056 INFO L226 Difference]: Without dead ends: 41217 [2021-11-12 22:37:26,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 852 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346500 ImplicationChecksByTransitivity, 159.3s TimeCoverageRelationStatistics Valid=60824, Invalid=667638, Unknown=0, NotChecked=0, Total=728462 [2021-11-12 22:37:26,122 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1774 mSDsluCounter, 4659 mSDsCounter, 0 mSdLazyCounter, 13143 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35866.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1774 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 13639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 58.97ms SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 13143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39514.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:26,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1774 Valid, 503 Invalid, 13639 Unknown, 0 Unchecked, 58.97ms Time], IncrementalHoareTripleChecker [496 Valid, 13143 Invalid, 0 Unknown, 0 Unchecked, 39514.37ms Time] [2021-11-12 22:37:26,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41217 states. [2021-11-12 22:37:27,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41217 to 15457. [2021-11-12 22:37:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15457 states, 15456 states have (on average 4.152885610766045) internal successors, (64187), 15456 states have internal predecessors, (64187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15457 states to 15457 states and 64187 transitions. [2021-11-12 22:37:27,477 INFO L78 Accepts]: Start accepts. Automaton has 15457 states and 64187 transitions. Word has length 42 [2021-11-12 22:37:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:27,478 INFO L470 AbstractCegarLoop]: Abstraction has 15457 states and 64187 transitions. [2021-11-12 22:37:27,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:27,478 INFO L276 IsEmpty]: Start isEmpty. Operand 15457 states and 64187 transitions. [2021-11-12 22:37:27,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-12 22:37:27,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:27,545 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:27,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-12 22:37:27,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-12 22:37:27,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:37:27,954 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:37:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:27,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1456617996, now seen corresponding path program 13 times [2021-11-12 22:37:27,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:37:27,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810316860] [2021-11-12 22:37:27,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:37:27,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:37:27,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:37:27,957 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:37:27,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-12 22:37:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:28,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:37:28,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:37:28,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:37:28,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:37:28,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810316860] [2021-11-12 22:37:28,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810316860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:28,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [642988123] [2021-11-12 22:37:28,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:37:28,577 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:37:28,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:37:28,577 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:37:28,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-12 22:37:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:28,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:37:28,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:37:28,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:37:29,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [642988123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:29,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572493175] [2021-11-12 22:37:29,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:37:29,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:37:29,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:37:29,252 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:37:29,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-12 22:37:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:29,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:37:29,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:37:29,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:37:30,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572493175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:30,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:37:30,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 12] total 34 [2021-11-12 22:37:30,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329290996] [2021-11-12 22:37:30,322 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:37:30,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-12 22:37:30,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:37:30,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-12 22:37:30,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 22:37:30,324 INFO L87 Difference]: Start difference. First operand 15457 states and 64187 transitions. Second operand has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:28,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:28,807 INFO L93 Difference]: Finished difference Result 48941 states and 195382 transitions. [2021-11-12 22:39:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 506 states. [2021-11-12 22:39:28,809 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-12 22:39:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:29,200 INFO L225 Difference]: With dead ends: 48941 [2021-11-12 22:39:29,200 INFO L226 Difference]: Without dead ends: 47813 [2021-11-12 22:39:29,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125233 ImplicationChecksByTransitivity, 83.0s TimeCoverageRelationStatistics Valid=24862, Invalid=242944, Unknown=0, NotChecked=0, Total=267806 [2021-11-12 22:39:29,222 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1610 mSDsluCounter, 4328 mSDsCounter, 0 mSdLazyCounter, 11688 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31988.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 12094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.91ms SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 11688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34974.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:29,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 331 Invalid, 12094 Unknown, 0 Unchecked, 56.91ms Time], IncrementalHoareTripleChecker [406 Valid, 11688 Invalid, 0 Unknown, 0 Unchecked, 34974.12ms Time] [2021-11-12 22:39:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47813 states. [2021-11-12 22:39:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47813 to 16897. [2021-11-12 22:39:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16897 states, 16896 states have (on average 4.154178503787879) internal successors, (70189), 16896 states have internal predecessors, (70189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16897 states to 16897 states and 70189 transitions. [2021-11-12 22:39:30,955 INFO L78 Accepts]: Start accepts. Automaton has 16897 states and 70189 transitions. Word has length 42 [2021-11-12 22:39:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:30,955 INFO L470 AbstractCegarLoop]: Abstraction has 16897 states and 70189 transitions. [2021-11-12 22:39:30,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:30,956 INFO L276 IsEmpty]: Start isEmpty. Operand 16897 states and 70189 transitions. [2021-11-12 22:39:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-12 22:39:31,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:31,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:31,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2021-11-12 22:39:31,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-12 22:39:31,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:31,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:31,683 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:39:31,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:31,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1209815108, now seen corresponding path program 14 times [2021-11-12 22:39:31,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:31,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516452141] [2021-11-12 22:39:31,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:39:31,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:31,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:31,686 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:31,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-12 22:39:31,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:39:31,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:39:31,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:39:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:39:32,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:39:32,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:32,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516452141] [2021-11-12 22:39:32,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516452141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:32,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2116451468] [2021-11-12 22:39:32,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:39:32,553 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:39:32,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:39:32,554 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:39:32,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2021-11-12 22:39:32,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:39:32,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55970851] [2021-11-12 22:39:32,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:39:32,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:39:32,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:39:32,909 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:39:32,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 1 [2021-11-12 22:39:32,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-12 22:39:33,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:39:33,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:39:33,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:39:33,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:39:33,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:39:34,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55970851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:34,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:39:34,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 12] total 34 [2021-11-12 22:39:34,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121842968] [2021-11-12 22:39:34,393 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-12 22:39:34,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-12 22:39:34,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-12 22:39:34,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 22:39:34,396 INFO L87 Difference]: Start difference. First operand 16897 states and 70189 transitions. Second operand has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:41:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:43,634 INFO L93 Difference]: Finished difference Result 66195 states and 264543 transitions. [2021-11-12 22:41:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 472 states. [2021-11-12 22:41:43,636 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-12 22:41:43,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:44,131 INFO L225 Difference]: With dead ends: 66195 [2021-11-12 22:41:44,131 INFO L226 Difference]: Without dead ends: 64629 [2021-11-12 22:41:44,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 480 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107663 ImplicationChecksByTransitivity, 92.9s TimeCoverageRelationStatistics Valid=23507, Invalid=208335, Unknown=0, NotChecked=0, Total=231842 [2021-11-12 22:41:44,145 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1164 mSDsluCounter, 3381 mSDsCounter, 0 mSdLazyCounter, 9666 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32507.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 9958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.70ms SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 9666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35767.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:44,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1164 Valid, 278 Invalid, 9958 Unknown, 0 Unchecked, 53.70ms Time], IncrementalHoareTripleChecker [292 Valid, 9666 Invalid, 0 Unknown, 0 Unchecked, 35767.70ms Time] [2021-11-12 22:41:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64629 states. [2021-11-12 22:41:46,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64629 to 25725. [2021-11-12 22:41:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25725 states, 25724 states have (on average 4.214857720416732) internal successors, (108423), 25724 states have internal predecessors, (108423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:41:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25725 states to 25725 states and 108423 transitions. [2021-11-12 22:41:46,481 INFO L78 Accepts]: Start accepts. Automaton has 25725 states and 108423 transitions. Word has length 42 [2021-11-12 22:41:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:46,482 INFO L470 AbstractCegarLoop]: Abstraction has 25725 states and 108423 transitions. [2021-11-12 22:41:46,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:41:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 25725 states and 108423 transitions. [2021-11-12 22:41:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-12 22:41:47,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:47,043 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:41:47,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:47,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:47,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:47,469 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:41:47,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:47,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2062251012, now seen corresponding path program 15 times [2021-11-12 22:41:47,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:47,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21611522] [2021-11-12 22:41:47,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:41:47,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:47,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:47,473 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:47,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-12 22:41:47,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:41:47,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:41:47,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 22:41:47,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:41:48,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:41:50,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:50,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21611522] [2021-11-12 22:41:50,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21611522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:41:50,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1466188161] [2021-11-12 22:41:50,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:41:50,030 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:41:50,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:41:50,031 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:41:50,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2021-11-12 22:41:50,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:41:50,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:41:50,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:41:50,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:41:51,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:41:51,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1466188161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:41:51,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314636128] [2021-11-12 22:41:51,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:41:51,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:41:51,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:41:51,760 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:41:51,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de737fe4-46dc-4c5c-81b9-1a85aa3691f6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-12 22:41:52,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:41:52,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:41:52,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 22:41:52,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:41:53,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:41:54,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314636128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:41:54,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:41:54,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10, 12, 11, 13] total 36 [2021-11-12 22:41:54,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782892259] [2021-11-12 22:41:54,935 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:41:54,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-12 22:41:54,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:54,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-12 22:41:54,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-11-12 22:41:54,936 INFO L87 Difference]: Start difference. First operand 25725 states and 108423 transitions. Second operand has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)