./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:35:54,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:35:54,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:35:54,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:35:54,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:35:54,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:35:54,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:35:54,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:35:54,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:35:54,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:35:54,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:35:54,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:35:54,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:35:54,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:35:54,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:35:54,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:35:54,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:35:54,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:35:54,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:35:54,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:35:54,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:35:54,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:35:54,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:35:54,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:35:54,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:35:54,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:35:54,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:35:54,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:35:54,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:35:54,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:35:54,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:35:54,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:35:54,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:35:54,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:35:54,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:35:54,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:35:54,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:35:54,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:35:54,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:35:54,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:35:54,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:35:54,231 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:35:54,270 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:35:54,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:35:54,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:35:54,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:35:54,272 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:35:54,272 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:35:54,272 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:35:54,272 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:35:54,273 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:35:54,273 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:35:54,273 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:35:54,273 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:35:54,274 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:35:54,274 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:35:54,274 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:35:54,274 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:35:54,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:35:54,275 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:35:54,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:35:54,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:35:54,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:35:54,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:35:54,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:35:54,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:35:54,277 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:35:54,277 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:35:54,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:35:54,278 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:35:54,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:35:54,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:35:54,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:35:54,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:35:54,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:35:54,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:35:54,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:35:54,280 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:35:54,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:35:54,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:35:54,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:35:54,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:35:54,281 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_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2021-11-19 13:35:54,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:35:54,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:35:54,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:35:54,637 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:35:54,638 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:35:54,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-11-19 13:35:54,723 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/data/ca027e23b/9c9f20ae51ea49009c88f058a736255a/FLAG3177de301 [2021-11-19 13:35:55,224 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:35:55,225 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-11-19 13:35:55,233 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/data/ca027e23b/9c9f20ae51ea49009c88f058a736255a/FLAG3177de301 [2021-11-19 13:35:55,584 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/data/ca027e23b/9c9f20ae51ea49009c88f058a736255a [2021-11-19 13:35:55,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:35:55,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:35:55,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:35:55,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:35:55,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:35:55,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:55" (1/1) ... [2021-11-19 13:35:55,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41108f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:55, skipping insertion in model container [2021-11-19 13:35:55,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:55" (1/1) ... [2021-11-19 13:35:55,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:35:55,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:35:55,867 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2021-11-19 13:35:55,878 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:35:55,890 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:35:55,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7790daf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:55, skipping insertion in model container [2021-11-19 13:35:55,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:35:55,891 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:35:55,893 INFO L158 Benchmark]: Toolchain (without parser) took 304.07ms. Allocated memory is still 134.2MB. Free memory was 92.7MB in the beginning and 107.3MB in the end (delta: -14.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 13:35:55,894 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 134.2MB. Free memory was 110.3MB in the beginning and 110.1MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:35:55,896 INFO L158 Benchmark]: CACSL2BoogieTranslator took 301.30ms. Allocated memory is still 134.2MB. Free memory was 92.5MB in the beginning and 107.3MB in the end (delta: -14.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 13:35:55,898 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 134.2MB. Free memory was 110.3MB in the beginning and 110.1MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 301.30ms. Allocated memory is still 134.2MB. Free memory was 92.5MB in the beginning and 107.3MB in the end (delta: -14.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 113]: 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_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:35:58,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:35:58,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:35:58,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:35:58,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:35:58,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:35:58,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:35:58,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:35:58,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:35:58,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:35:58,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:35:58,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:35:58,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:35:58,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:35:58,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:35:58,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:35:58,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:35:58,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:35:58,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:35:58,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:35:58,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:35:58,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:35:58,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:35:58,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:35:58,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:35:58,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:35:58,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:35:58,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:35:58,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:35:58,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:35:58,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:35:58,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:35:58,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:35:58,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:35:58,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:35:58,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:35:58,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:35:58,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:35:58,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:35:58,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:35:58,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:35:58,370 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:35:58,418 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:35:58,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:35:58,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:35:58,420 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:35:58,421 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:35:58,421 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:35:58,421 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:35:58,422 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:35:58,422 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:35:58,422 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:35:58,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:35:58,425 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:35:58,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:35:58,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:35:58,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:35:58,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:35:58,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:35:58,427 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:35:58,427 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:35:58,427 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:35:58,427 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:35:58,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:35:58,428 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:35:58,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:35:58,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:35:58,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:35:58,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:35:58,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:35:58,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:35:58,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:35:58,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:35:58,431 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:35:58,431 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:35:58,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:35:58,432 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:35:58,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:35:58,432 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_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2021-11-19 13:35:58,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:35:58,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:35:58,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:35:58,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:35:58,826 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:35:58,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-11-19 13:35:58,904 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/data/e6e9bc428/b46add30ec9b45399d9f8aec75bcf8ff/FLAG380fbbe8a [2021-11-19 13:35:59,449 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:35:59,456 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-11-19 13:35:59,469 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/data/e6e9bc428/b46add30ec9b45399d9f8aec75bcf8ff/FLAG380fbbe8a [2021-11-19 13:35:59,785 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/data/e6e9bc428/b46add30ec9b45399d9f8aec75bcf8ff [2021-11-19 13:35:59,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:35:59,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:35:59,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:35:59,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:35:59,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:35:59,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:59" (1/1) ... [2021-11-19 13:35:59,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@162e1fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:59, skipping insertion in model container [2021-11-19 13:35:59,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:59" (1/1) ... [2021-11-19 13:35:59,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:35:59,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:36:00,111 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2021-11-19 13:36:00,126 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:36:00,161 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:36:00,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:36:00,228 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2021-11-19 13:36:00,240 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:36:00,246 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:36:00,275 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2021-11-19 13:36:00,282 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:36:00,303 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:36:00,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:00 WrapperNode [2021-11-19 13:36:00,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:36:00,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:36:00,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:36:00,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:36:00,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:00" (1/1) ... [2021-11-19 13:36:00,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:00" (1/1) ... [2021-11-19 13:36:00,386 INFO L137 Inliner]: procedures = 27, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 194 [2021-11-19 13:36:00,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:36:00,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:36:00,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:36:00,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:36:00,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:00" (1/1) ... [2021-11-19 13:36:00,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:00" (1/1) ... [2021-11-19 13:36:00,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:00" (1/1) ... [2021-11-19 13:36:00,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:00" (1/1) ... [2021-11-19 13:36:00,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:00" (1/1) ... [2021-11-19 13:36:00,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:00" (1/1) ... [2021-11-19 13:36:00,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:00" (1/1) ... [2021-11-19 13:36:00,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:36:00,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:36:00,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:36:00,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:36:00,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:00" (1/1) ... [2021-11-19 13:36:00,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:36:00,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:36:00,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:36:00,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:36:00,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:36:00,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:36:00,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:36:00,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 13:36:00,572 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-19 13:36:00,572 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-19 13:36:00,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-19 13:36:00,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-19 13:36:00,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-19 13:36:00,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-19 13:36:00,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-19 13:36:00,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-19 13:36:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:36:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:36:00,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:36:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:36:00,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 13:36:00,578 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-19 13:36:00,764 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:36:00,765 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:36:01,263 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:36:01,475 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:36:01,480 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 13:36:01,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:36:01 BoogieIcfgContainer [2021-11-19 13:36:01,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:36:01,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:36:01,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:36:01,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:36:01,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:35:59" (1/3) ... [2021-11-19 13:36:01,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3713e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:36:01, skipping insertion in model container [2021-11-19 13:36:01,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:00" (2/3) ... [2021-11-19 13:36:01,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3713e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:36:01, skipping insertion in model container [2021-11-19 13:36:01,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:36:01" (3/3) ... [2021-11-19 13:36:01,508 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2021-11-19 13:36:01,514 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-19 13:36:01,523 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:36:01,523 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:36:01,523 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-19 13:36:01,568 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,568 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,569 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,569 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,569 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,569 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,570 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,570 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,570 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,570 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,571 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,571 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,571 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,571 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,571 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,572 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,572 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,572 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,572 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,572 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,573 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,573 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,573 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,574 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,574 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,574 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,574 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,574 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,575 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,575 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,575 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,575 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,596 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,596 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,597 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,597 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,597 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,597 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,598 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,598 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,598 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,598 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,598 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,599 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,599 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,599 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,600 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,600 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,600 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,601 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,601 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,601 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,601 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,602 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,602 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,602 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,602 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,602 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,603 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,603 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,603 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,603 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,604 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,604 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,604 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,604 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,605 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,605 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,605 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,605 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,605 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,606 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,606 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,606 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,606 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,606 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,607 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,607 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,608 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,608 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,608 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,608 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,609 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,609 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,609 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,609 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,610 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,610 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,610 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,611 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,611 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,611 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,611 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,612 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,612 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,612 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,612 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,613 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,613 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,613 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,613 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,613 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,614 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,614 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,614 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~tmp~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,614 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,614 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,615 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,615 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,615 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,615 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,616 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,616 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,616 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,616 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,617 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~tmp~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,617 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,617 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,617 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,617 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,618 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~tmp~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,618 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~tmp~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,618 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,619 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,619 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,619 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,619 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,620 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,620 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,620 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,620 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,621 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,624 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,624 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,625 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,625 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,625 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,625 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,626 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,626 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,626 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,626 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,627 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,627 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,627 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,627 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,629 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,629 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,629 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,629 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,630 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,630 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,630 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,630 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,631 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~tmp~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,631 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,631 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,631 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,632 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,632 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,633 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,633 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,633 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,634 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,634 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,634 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,634 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,641 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,641 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,641 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,642 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,642 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,642 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,642 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 13:36:01,645 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-19 13:36:01,702 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:36:01,717 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:36:01,718 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-19 13:36:01,750 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-19 13:36:01,777 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 153 transitions, 330 flow [2021-11-19 13:36:01,787 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 153 transitions, 330 flow [2021-11-19 13:36:01,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 151 places, 153 transitions, 330 flow [2021-11-19 13:36:01,862 INFO L129 PetriNetUnfolder]: 12/150 cut-off events. [2021-11-19 13:36:01,862 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-19 13:36:01,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 12/150 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 96 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2021-11-19 13:36:01,883 INFO L116 LiptonReduction]: Number of co-enabled transitions 1518 [2021-11-19 13:36:23,572 INFO L131 LiptonReduction]: Checked pairs total: 2300 [2021-11-19 13:36:23,572 INFO L133 LiptonReduction]: Total number of compositions: 142 [2021-11-19 13:36:23,581 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 30 transitions, 84 flow [2021-11-19 13:36:23,618 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 171 states, 170 states have (on average 3.164705882352941) internal successors, (538), 170 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:23,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 170 states have (on average 3.164705882352941) internal successors, (538), 170 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 13:36:23,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:23,633 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] [2021-11-19 13:36:23,634 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:36:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1793833843, now seen corresponding path program 1 times [2021-11-19 13:36:23,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:23,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318978049] [2021-11-19 13:36:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:23,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:23,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:23,671 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:23,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:36:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:23,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:36:23,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:24,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:24,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:24,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318978049] [2021-11-19 13:36:24,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318978049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:24,372 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:24,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-19 13:36:24,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577427109] [2021-11-19 13:36:24,375 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:24,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:36:24,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:24,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:36:24,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:36:24,434 INFO L87 Difference]: Start difference. First operand has 171 states, 170 states have (on average 3.164705882352941) internal successors, (538), 170 states have internal predecessors, (538), 0 states have call successors, (0), 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 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:24,719 INFO L93 Difference]: Finished difference Result 332 states and 1054 transitions. [2021-11-19 13:36:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:36:24,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-19 13:36:24,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:24,744 INFO L225 Difference]: With dead ends: 332 [2021-11-19 13:36:24,744 INFO L226 Difference]: Without dead ends: 325 [2021-11-19 13:36:24,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:36:24,750 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:24,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:36:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-19 13:36:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 261. [2021-11-19 13:36:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.173076923076923) internal successors, (825), 260 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 825 transitions. [2021-11-19 13:36:24,903 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 825 transitions. Word has length 20 [2021-11-19 13:36:24,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:24,904 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 825 transitions. [2021-11-19 13:36:24,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:24,905 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 825 transitions. [2021-11-19 13:36:24,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 13:36:24,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:24,910 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] [2021-11-19 13:36:24,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 13:36:25,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:25,116 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:36:25,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:25,117 INFO L85 PathProgramCache]: Analyzing trace with hash -705642667, now seen corresponding path program 1 times [2021-11-19 13:36:25,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:25,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527713613] [2021-11-19 13:36:25,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:25,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:25,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:25,119 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:25,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:36:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:25,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 13:36:25,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:25,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:25,740 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:25,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527713613] [2021-11-19 13:36:25,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527713613] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:25,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:25,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-19 13:36:25,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876145322] [2021-11-19 13:36:25,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:25,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:36:25,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:25,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:36:25,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:36:25,744 INFO L87 Difference]: Start difference. First operand 261 states and 825 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:26,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:26,273 INFO L93 Difference]: Finished difference Result 507 states and 1547 transitions. [2021-11-19 13:36:26,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:36:26,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2021-11-19 13:36:26,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:26,281 INFO L225 Difference]: With dead ends: 507 [2021-11-19 13:36:26,281 INFO L226 Difference]: Without dead ends: 503 [2021-11-19 13:36:26,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:36:26,284 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 57 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:26,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 13 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:36:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-19 13:36:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 383. [2021-11-19 13:36:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.2198952879581153) internal successors, (1230), 382 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:26,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1230 transitions. [2021-11-19 13:36:26,343 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1230 transitions. Word has length 21 [2021-11-19 13:36:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:26,343 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1230 transitions. [2021-11-19 13:36:26,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1230 transitions. [2021-11-19 13:36:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:36:26,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:26,349 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] [2021-11-19 13:36:26,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:26,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:26,550 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:36:26,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:26,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1741884638, now seen corresponding path program 1 times [2021-11-19 13:36:26,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:26,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190561434] [2021-11-19 13:36:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:26,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:26,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:26,561 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:26,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:36:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:26,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:36:26,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:27,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:27,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:27,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190561434] [2021-11-19 13:36:27,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190561434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:27,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [217392378] [2021-11-19 13:36:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:27,699 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:27,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:27,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:27,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 13:36:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:27,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:36:27,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:28,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:28,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [217392378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:28,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824623395] [2021-11-19 13:36:28,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:28,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:36:28,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:36:28,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:36:28,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 13:36:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:36:28,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:28,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:29,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824623395] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:29,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 13:36:29,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 8] total 26 [2021-11-19 13:36:29,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608697409] [2021-11-19 13:36:29,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:29,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:36:29,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:29,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:36:29,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-11-19 13:36:29,022 INFO L87 Difference]: Start difference. First operand 383 states and 1230 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:36:30,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:30,566 INFO L93 Difference]: Finished difference Result 569 states and 1804 transitions. [2021-11-19 13:36:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 13:36:30,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-19 13:36:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:30,575 INFO L225 Difference]: With dead ends: 569 [2021-11-19 13:36:30,575 INFO L226 Difference]: Without dead ends: 569 [2021-11-19 13:36:30,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 13:36:30,586 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:30,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 30 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 13:36:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-19 13:36:30,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 399. [2021-11-19 13:36:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.2462311557788945) internal successors, (1292), 398 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1292 transitions. [2021-11-19 13:36:30,635 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1292 transitions. Word has length 22 [2021-11-19 13:36:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:30,636 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1292 transitions. [2021-11-19 13:36:30,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:36:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1292 transitions. [2021-11-19 13:36:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:36:30,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:30,640 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] [2021-11-19 13:36:30,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:30,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:31,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:31,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:31,256 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:36:31,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:31,256 INFO L85 PathProgramCache]: Analyzing trace with hash -318441572, now seen corresponding path program 2 times [2021-11-19 13:36:31,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:31,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976216434] [2021-11-19 13:36:31,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:36:31,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:31,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:31,258 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:31,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:36:31,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:36:31,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:31,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:36:31,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:31,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:32,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:32,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976216434] [2021-11-19 13:36:32,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976216434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:32,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2037711725] [2021-11-19 13:36:32,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:36:32,340 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:32,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:32,341 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:32,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 13:36:32,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:36:32,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:32,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:36:32,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:32,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:32,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2037711725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:32,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926536766] [2021-11-19 13:36:32,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:36:32,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:36:32,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:36:32,983 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:36:33,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 13:36:33,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:36:33,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:33,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:36:33,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:33,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:33,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926536766] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:33,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:36:33,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 7] total 18 [2021-11-19 13:36:33,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545227413] [2021-11-19 13:36:33,673 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:36:33,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 13:36:33,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:33,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 13:36:33,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:36:33,678 INFO L87 Difference]: Start difference. First operand 399 states and 1292 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:40,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:40,656 INFO L93 Difference]: Finished difference Result 1465 states and 4550 transitions. [2021-11-19 13:36:40,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 13:36:40,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2021-11-19 13:36:40,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:40,674 INFO L225 Difference]: With dead ends: 1465 [2021-11-19 13:36:40,675 INFO L226 Difference]: Without dead ends: 1465 [2021-11-19 13:36:40,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=779, Invalid=2413, Unknown=0, NotChecked=0, Total=3192 [2021-11-19 13:36:40,678 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 399 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:40,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 130 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-19 13:36:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-11-19 13:36:40,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 569. [2021-11-19 13:36:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.3943661971830985) internal successors, (1928), 568 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1928 transitions. [2021-11-19 13:36:40,735 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1928 transitions. Word has length 22 [2021-11-19 13:36:40,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:40,736 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1928 transitions. [2021-11-19 13:36:40,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1928 transitions. [2021-11-19 13:36:40,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:36:40,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:40,740 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] [2021-11-19 13:36:40,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-19 13:36:40,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:41,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-19 13:36:41,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:36:41,355 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:36:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:41,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2010620854, now seen corresponding path program 3 times [2021-11-19 13:36:41,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:41,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456746729] [2021-11-19 13:36:41,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:36:41,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:41,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:41,359 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:41,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:36:41,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 13:36:41,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:41,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:36:41,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:42,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:42,477 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:42,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456746729] [2021-11-19 13:36:42,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456746729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:42,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [483367899] [2021-11-19 13:36:42,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:36:42,478 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:42,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:42,480 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:42,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 13:36:42,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 13:36:42,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:42,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:36:42,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:43,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:43,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [483367899] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:43,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400961844] [2021-11-19 13:36:43,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:36:43,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:36:43,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:36:43,300 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:36:43,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 13:36:43,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 13:36:43,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:43,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:36:43,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:43,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:44,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400961844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:44,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:36:44,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 7] total 18 [2021-11-19 13:36:44,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90383749] [2021-11-19 13:36:44,173 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:36:44,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 13:36:44,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 13:36:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:36:44,175 INFO L87 Difference]: Start difference. First operand 569 states and 1928 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:49,948 INFO L93 Difference]: Finished difference Result 1247 states and 3870 transitions. [2021-11-19 13:36:49,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 13:36:49,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2021-11-19 13:36:49,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:49,963 INFO L225 Difference]: With dead ends: 1247 [2021-11-19 13:36:49,963 INFO L226 Difference]: Without dead ends: 1247 [2021-11-19 13:36:49,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=540, Invalid=1440, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 13:36:49,966 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 409 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:49,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 87 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-19 13:36:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-11-19 13:36:50,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 593. [2021-11-19 13:36:50,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.3597972972972974) internal successors, (1989), 592 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1989 transitions. [2021-11-19 13:36:50,022 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1989 transitions. Word has length 22 [2021-11-19 13:36:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:50,022 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1989 transitions. [2021-11-19 13:36:50,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1989 transitions. [2021-11-19 13:36:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:36:50,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:50,026 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] [2021-11-19 13:36:50,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:50,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-19 13:36:50,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:50,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:50,643 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:36:50,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:50,644 INFO L85 PathProgramCache]: Analyzing trace with hash 642066306, now seen corresponding path program 4 times [2021-11-19 13:36:50,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:50,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087867470] [2021-11-19 13:36:50,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:36:50,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:50,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:50,645 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:50,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:36:50,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:36:50,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:50,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:36:50,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:51,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:51,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:51,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087867470] [2021-11-19 13:36:51,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087867470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:51,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1658585948] [2021-11-19 13:36:51,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:36:51,597 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:51,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:51,599 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:51,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 13:36:51,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:36:51,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:51,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:36:51,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:52,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:52,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1658585948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:52,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557673469] [2021-11-19 13:36:52,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:36:52,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:36:52,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:36:52,411 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:36:52,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 13:36:52,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:36:52,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:52,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:36:52,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:52,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:53,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557673469] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:53,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 13:36:53,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 8] total 25 [2021-11-19 13:36:53,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842189164] [2021-11-19 13:36:53,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:53,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:36:53,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:53,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:36:53,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-11-19 13:36:53,057 INFO L87 Difference]: Start difference. First operand 593 states and 1989 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:36:54,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:54,346 INFO L93 Difference]: Finished difference Result 959 states and 3162 transitions. [2021-11-19 13:36:54,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:36:54,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-19 13:36:54,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:54,358 INFO L225 Difference]: With dead ends: 959 [2021-11-19 13:36:54,359 INFO L226 Difference]: Without dead ends: 959 [2021-11-19 13:36:54,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-11-19 13:36:54,361 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:54,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 25 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:36:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-11-19 13:36:54,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 605. [2021-11-19 13:36:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.3890728476821192) internal successors, (2047), 604 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:54,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 2047 transitions. [2021-11-19 13:36:54,400 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 2047 transitions. Word has length 22 [2021-11-19 13:36:54,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:54,400 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 2047 transitions. [2021-11-19 13:36:54,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:36:54,401 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 2047 transitions. [2021-11-19 13:36:54,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:36:54,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:54,404 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] [2021-11-19 13:36:54,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:54,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-19 13:36:54,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-19 13:36:55,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:55,008 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:36:55,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:55,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1050112976, now seen corresponding path program 5 times [2021-11-19 13:36:55,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:55,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943648670] [2021-11-19 13:36:55,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 13:36:55,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:55,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:55,011 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:55,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:36:55,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:36:55,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:55,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:36:55,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:55,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:55,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:55,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943648670] [2021-11-19 13:36:55,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943648670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:55,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1566428440] [2021-11-19 13:36:55,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 13:36:55,947 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:55,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:55,950 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:55,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 13:36:56,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:36:56,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:56,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:36:56,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:56,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:56,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1566428440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:56,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228760702] [2021-11-19 13:36:56,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 13:36:56,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:36:56,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:36:56,647 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:36:56,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 13:36:56,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:36:56,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:56,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:36:56,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:57,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:57,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228760702] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:57,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 13:36:57,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 8] total 27 [2021-11-19 13:36:57,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341985272] [2021-11-19 13:36:57,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:57,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:36:57,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:57,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:36:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:36:57,268 INFO L87 Difference]: Start difference. First operand 605 states and 2047 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:36:58,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:58,984 INFO L93 Difference]: Finished difference Result 909 states and 2981 transitions. [2021-11-19 13:36:58,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 13:36:58,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-19 13:36:58,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:58,995 INFO L225 Difference]: With dead ends: 909 [2021-11-19 13:36:58,995 INFO L226 Difference]: Without dead ends: 909 [2021-11-19 13:36:58,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 13:36:58,997 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:58,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 29 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 13:36:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-11-19 13:36:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 599. [2021-11-19 13:36:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.369565217391304) internal successors, (2015), 598 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 2015 transitions. [2021-11-19 13:36:59,034 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 2015 transitions. Word has length 22 [2021-11-19 13:36:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:59,034 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 2015 transitions. [2021-11-19 13:36:59,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:36:59,035 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 2015 transitions. [2021-11-19 13:36:59,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:36:59,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:59,038 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] [2021-11-19 13:36:59,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 13:36:59,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-19 13:36:59,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:59,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:59,651 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:36:59,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:59,652 INFO L85 PathProgramCache]: Analyzing trace with hash -165762014, now seen corresponding path program 6 times [2021-11-19 13:36:59,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:59,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463116829] [2021-11-19 13:36:59,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 13:36:59,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:59,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:59,655 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:59,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:36:59,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 13:36:59,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:59,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:36:59,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:00,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:00,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:00,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463116829] [2021-11-19 13:37:00,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463116829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:00,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [623519332] [2021-11-19 13:37:00,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 13:37:00,533 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:00,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:00,544 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:00,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 13:37:00,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 13:37:00,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 13:37:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:01,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:01,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [623519332] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:01,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:37:01,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 18 [2021-11-19 13:37:01,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407966595] [2021-11-19 13:37:01,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:01,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:37:01,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:37:01,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:37:01,192 INFO L87 Difference]: Start difference. First operand 599 states and 2015 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-19 13:37:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:02,304 INFO L93 Difference]: Finished difference Result 835 states and 2687 transitions. [2021-11-19 13:37:02,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:37:02,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 [2021-11-19 13:37:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:02,313 INFO L225 Difference]: With dead ends: 835 [2021-11-19 13:37:02,313 INFO L226 Difference]: Without dead ends: 835 [2021-11-19 13:37:02,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:37:02,315 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 83 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:02,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 34 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:37:02,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-11-19 13:37:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 601. [2021-11-19 13:37:02,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 3.395) internal successors, (2037), 600 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 2037 transitions. [2021-11-19 13:37:02,350 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 2037 transitions. Word has length 22 [2021-11-19 13:37:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:02,350 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 2037 transitions. [2021-11-19 13:37:02,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-19 13:37:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 2037 transitions. [2021-11-19 13:37:02,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:02,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:02,354 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] [2021-11-19 13:37:02,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:02,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:02,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:02,767 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1903263486, now seen corresponding path program 7 times [2021-11-19 13:37:02,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:02,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888333687] [2021-11-19 13:37:02,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 13:37:02,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:02,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:02,770 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:02,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:37:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:02,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:02,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:03,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:03,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:03,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888333687] [2021-11-19 13:37:03,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888333687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:03,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1873970004] [2021-11-19 13:37:03,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 13:37:03,593 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:03,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:03,595 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:03,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-19 13:37:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:03,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:37:03,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:04,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:04,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1873970004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:04,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446584206] [2021-11-19 13:37:04,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 13:37:04,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:37:04,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:04,271 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:37:04,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 13:37:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:04,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:37:04,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:04,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:05,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446584206] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:05,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 13:37:05,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 30 [2021-11-19 13:37:05,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949277001] [2021-11-19 13:37:05,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:05,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:37:05,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:05,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:37:05,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:37:05,026 INFO L87 Difference]: Start difference. First operand 601 states and 2037 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:06,272 INFO L93 Difference]: Finished difference Result 819 states and 2765 transitions. [2021-11-19 13:37:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 13:37:06,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-19 13:37:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:06,281 INFO L225 Difference]: With dead ends: 819 [2021-11-19 13:37:06,281 INFO L226 Difference]: Without dead ends: 819 [2021-11-19 13:37:06,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 13:37:06,283 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:06,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 22 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:37:06,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-11-19 13:37:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 629. [2021-11-19 13:37:06,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.426751592356688) internal successors, (2152), 628 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:06,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2152 transitions. [2021-11-19 13:37:06,317 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2152 transitions. Word has length 22 [2021-11-19 13:37:06,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:06,318 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 2152 transitions. [2021-11-19 13:37:06,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:06,318 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2152 transitions. [2021-11-19 13:37:06,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:06,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:06,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:06,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:06,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-19 13:37:06,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:06,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:37:06,925 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:06,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1232796586, now seen corresponding path program 8 times [2021-11-19 13:37:06,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:06,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760733598] [2021-11-19 13:37:06,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:37:06,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:06,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:06,927 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:06,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:37:07,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:37:07,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:07,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:07,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:07,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:07,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760733598] [2021-11-19 13:37:07,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760733598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:07,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1952977386] [2021-11-19 13:37:07,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:37:07,718 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:07,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:07,719 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:07,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-19 13:37:07,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:37:07,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:07,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:07,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:08,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:08,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1952977386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:08,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471873761] [2021-11-19 13:37:08,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:37:08,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:37:08,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:08,378 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:37:08,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 13:37:08,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:37:08,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:08,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:37:08,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:09,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:09,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471873761] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:09,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 13:37:09,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 24 [2021-11-19 13:37:09,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775415318] [2021-11-19 13:37:09,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:09,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:37:09,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:09,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:37:09,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-11-19 13:37:09,401 INFO L87 Difference]: Start difference. First operand 629 states and 2152 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:10,790 INFO L93 Difference]: Finished difference Result 871 states and 2935 transitions. [2021-11-19 13:37:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:37:10,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-19 13:37:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:10,799 INFO L225 Difference]: With dead ends: 871 [2021-11-19 13:37:10,799 INFO L226 Difference]: Without dead ends: 871 [2021-11-19 13:37:10,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:37:10,800 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:10,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 25 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:37:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-11-19 13:37:10,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 635. [2021-11-19 13:37:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.4337539432176656) internal successors, (2177), 634 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2177 transitions. [2021-11-19 13:37:10,836 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2177 transitions. Word has length 22 [2021-11-19 13:37:10,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:10,836 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 2177 transitions. [2021-11-19 13:37:10,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2177 transitions. [2021-11-19 13:37:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:10,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:10,840 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] [2021-11-19 13:37:10,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:11,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-19 13:37:11,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:11,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:11,463 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:11,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:11,464 INFO L85 PathProgramCache]: Analyzing trace with hash -949599178, now seen corresponding path program 9 times [2021-11-19 13:37:11,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:11,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893713769] [2021-11-19 13:37:11,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:37:11,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:11,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:11,466 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:11,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 13:37:11,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 13:37:11,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:11,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:11,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:11,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:12,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:12,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893713769] [2021-11-19 13:37:12,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893713769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:12,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [233420417] [2021-11-19 13:37:12,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:37:12,222 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:12,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:12,223 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:12,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-19 13:37:12,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 13:37:12,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:12,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 13:37:12,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:12,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:12,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [233420417] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:12,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:37:12,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2021-11-19 13:37:12,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749983958] [2021-11-19 13:37:12,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:12,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:37:12,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:12,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:37:12,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:37:12,915 INFO L87 Difference]: Start difference. First operand 635 states and 2177 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-19 13:37:13,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:13,924 INFO L93 Difference]: Finished difference Result 929 states and 3006 transitions. [2021-11-19 13:37:13,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:37:13,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 [2021-11-19 13:37:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:13,935 INFO L225 Difference]: With dead ends: 929 [2021-11-19 13:37:13,935 INFO L226 Difference]: Without dead ends: 929 [2021-11-19 13:37:13,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:37:13,937 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:13,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 41 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:37:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-11-19 13:37:13,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 581. [2021-11-19 13:37:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 3.339655172413793) internal successors, (1937), 580 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1937 transitions. [2021-11-19 13:37:13,976 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1937 transitions. Word has length 22 [2021-11-19 13:37:13,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:13,976 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 1937 transitions. [2021-11-19 13:37:13,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-19 13:37:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1937 transitions. [2021-11-19 13:37:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:13,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:13,980 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] [2021-11-19 13:37:13,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-19 13:37:14,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-19 13:37:14,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:14,383 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:14,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:14,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1449130922, now seen corresponding path program 10 times [2021-11-19 13:37:14,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:14,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721885811] [2021-11-19 13:37:14,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:37:14,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:14,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:14,385 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:14,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 13:37:14,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:37:14,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:14,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:14,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:14,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:15,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:15,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721885811] [2021-11-19 13:37:15,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721885811] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:15,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1545374404] [2021-11-19 13:37:15,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:37:15,157 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:15,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:15,158 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:15,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-19 13:37:15,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:37:15,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:15,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:37:15,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:15,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:15,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1545374404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:15,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565264518] [2021-11-19 13:37:15,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:37:15,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:37:15,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:15,793 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:37:15,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-19 13:37:15,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:37:15,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:15,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:37:15,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:16,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:16,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565264518] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:16,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 13:37:16,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 31 [2021-11-19 13:37:16,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398015369] [2021-11-19 13:37:16,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:16,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:37:16,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:16,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:37:16,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2021-11-19 13:37:16,683 INFO L87 Difference]: Start difference. First operand 581 states and 1937 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:17,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:17,925 INFO L93 Difference]: Finished difference Result 965 states and 3177 transitions. [2021-11-19 13:37:17,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:37:17,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-19 13:37:17,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:17,935 INFO L225 Difference]: With dead ends: 965 [2021-11-19 13:37:17,935 INFO L226 Difference]: Without dead ends: 965 [2021-11-19 13:37:17,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 13:37:17,936 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 75 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:17,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:37:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-19 13:37:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 599. [2021-11-19 13:37:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.3946488294314383) internal successors, (2030), 598 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:17,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 2030 transitions. [2021-11-19 13:37:17,968 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 2030 transitions. Word has length 22 [2021-11-19 13:37:17,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:17,968 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 2030 transitions. [2021-11-19 13:37:17,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:17,969 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 2030 transitions. [2021-11-19 13:37:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:17,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:17,972 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] [2021-11-19 13:37:18,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:18,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-19 13:37:18,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-19 13:37:18,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:18,587 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:18,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:18,587 INFO L85 PathProgramCache]: Analyzing trace with hash -733264842, now seen corresponding path program 11 times [2021-11-19 13:37:18,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:18,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093821258] [2021-11-19 13:37:18,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 13:37:18,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:18,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:18,589 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:18,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 13:37:18,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:37:18,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:18,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:18,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:19,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:19,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:19,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093821258] [2021-11-19 13:37:19,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093821258] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:19,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:37:19,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-11-19 13:37:19,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400779785] [2021-11-19 13:37:19,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:19,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:37:19,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:19,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:37:19,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:37:19,625 INFO L87 Difference]: Start difference. First operand 599 states and 2030 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-11-19 13:37:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:20,620 INFO L93 Difference]: Finished difference Result 1015 states and 3294 transitions. [2021-11-19 13:37:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 13:37:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 [2021-11-19 13:37:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:20,644 INFO L225 Difference]: With dead ends: 1015 [2021-11-19 13:37:20,645 INFO L226 Difference]: Without dead ends: 977 [2021-11-19 13:37:20,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:37:20,646 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:20,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 17 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:37:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-19 13:37:20,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 713. [2021-11-19 13:37:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.356741573033708) internal successors, (2390), 712 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:20,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2390 transitions. [2021-11-19 13:37:20,685 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2390 transitions. Word has length 22 [2021-11-19 13:37:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:20,685 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 2390 transitions. [2021-11-19 13:37:20,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-11-19 13:37:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2390 transitions. [2021-11-19 13:37:20,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:20,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:20,690 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] [2021-11-19 13:37:20,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:20,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:20,905 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:20,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1992238052, now seen corresponding path program 12 times [2021-11-19 13:37:20,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:20,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739752688] [2021-11-19 13:37:20,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 13:37:20,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:20,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:20,908 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:20,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 13:37:21,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 13:37:21,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:21,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:37:21,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:21,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:22,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:22,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739752688] [2021-11-19 13:37:22,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739752688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:22,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1378579327] [2021-11-19 13:37:22,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 13:37:22,105 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:22,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:22,106 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:22,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-19 13:37:22,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 13:37:22,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:22,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:22,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1378579327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:22,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873317366] [2021-11-19 13:37:22,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 13:37:22,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:37:22,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:22,809 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:37:22,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-19 13:37:22,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 13:37:22,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:22,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:37:22,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:23,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:23,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873317366] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:23,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 13:37:23,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 10, 7, 7, 9] total 30 [2021-11-19 13:37:23,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313291283] [2021-11-19 13:37:23,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:23,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:37:23,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:23,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:37:23,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:37:23,461 INFO L87 Difference]: Start difference. First operand 713 states and 2390 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:24,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:24,502 INFO L93 Difference]: Finished difference Result 1185 states and 3789 transitions. [2021-11-19 13:37:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:37:24,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-19 13:37:24,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:24,510 INFO L225 Difference]: With dead ends: 1185 [2021-11-19 13:37:24,511 INFO L226 Difference]: Without dead ends: 1185 [2021-11-19 13:37:24,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=271, Invalid=919, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 13:37:24,512 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:24,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 18 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:37:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-11-19 13:37:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 719. [2021-11-19 13:37:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.3732590529247912) internal successors, (2422), 718 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2422 transitions. [2021-11-19 13:37:24,546 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2422 transitions. Word has length 22 [2021-11-19 13:37:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:24,546 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 2422 transitions. [2021-11-19 13:37:24,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2422 transitions. [2021-11-19 13:37:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:24,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:24,550 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] [2021-11-19 13:37:24,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:24,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-19 13:37:24,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-19 13:37:25,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:25,153 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:25,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:25,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1074287862, now seen corresponding path program 13 times [2021-11-19 13:37:25,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:25,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953394515] [2021-11-19 13:37:25,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 13:37:25,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:25,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:25,155 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:25,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 13:37:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:25,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:25,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:25,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:25,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:25,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953394515] [2021-11-19 13:37:25,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953394515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:25,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2051788985] [2021-11-19 13:37:25,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 13:37:25,805 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:25,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:25,806 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:25,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-19 13:37:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:25,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:37:25,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:26,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:26,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2051788985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:26,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409498869] [2021-11-19 13:37:26,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 13:37:26,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:37:26,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:26,354 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:37:26,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-19 13:37:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:26,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:37:26,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:26,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:26,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409498869] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:26,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 13:37:26,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 29 [2021-11-19 13:37:26,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136848817] [2021-11-19 13:37:26,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:26,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:37:26,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:26,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:37:26,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2021-11-19 13:37:26,977 INFO L87 Difference]: Start difference. First operand 719 states and 2422 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:28,265 INFO L93 Difference]: Finished difference Result 1155 states and 3746 transitions. [2021-11-19 13:37:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 13:37:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-19 13:37:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:28,274 INFO L225 Difference]: With dead ends: 1155 [2021-11-19 13:37:28,274 INFO L226 Difference]: Without dead ends: 1155 [2021-11-19 13:37:28,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=317, Invalid=1089, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 13:37:28,276 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 96 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:28,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:37:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-11-19 13:37:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 713. [2021-11-19 13:37:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.356741573033708) internal successors, (2390), 712 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2390 transitions. [2021-11-19 13:37:28,304 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2390 transitions. Word has length 22 [2021-11-19 13:37:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:28,304 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 2390 transitions. [2021-11-19 13:37:28,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2390 transitions. [2021-11-19 13:37:28,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:28,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:28,308 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] [2021-11-19 13:37:28,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-11-19 13:37:28,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-19 13:37:28,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:28,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:37:28,910 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:28,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:28,911 INFO L85 PathProgramCache]: Analyzing trace with hash 875050340, now seen corresponding path program 14 times [2021-11-19 13:37:28,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:28,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860829859] [2021-11-19 13:37:28,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:37:28,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:28,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:28,913 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:28,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-19 13:37:29,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:37:29,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:29,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:29,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:29,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:29,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:29,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860829859] [2021-11-19 13:37:29,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860829859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:29,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [521195044] [2021-11-19 13:37:29,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:37:29,554 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:29,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:29,555 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:29,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-19 13:37:29,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:37:29,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:29,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 13:37:29,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:29,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:30,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [521195044] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:30,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:37:30,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 19 [2021-11-19 13:37:30,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138968037] [2021-11-19 13:37:30,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:30,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:37:30,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:37:30,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:37:30,097 INFO L87 Difference]: Start difference. First operand 713 states and 2390 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-19 13:37:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:30,949 INFO L93 Difference]: Finished difference Result 1055 states and 3371 transitions. [2021-11-19 13:37:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:37:30,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 [2021-11-19 13:37:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:30,958 INFO L225 Difference]: With dead ends: 1055 [2021-11-19 13:37:30,958 INFO L226 Difference]: Without dead ends: 1055 [2021-11-19 13:37:30,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-11-19 13:37:30,959 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 111 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:30,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 33 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:37:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-11-19 13:37:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 717. [2021-11-19 13:37:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.381284916201117) internal successors, (2421), 716 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2421 transitions. [2021-11-19 13:37:30,986 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2421 transitions. Word has length 22 [2021-11-19 13:37:30,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:30,986 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 2421 transitions. [2021-11-19 13:37:30,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-19 13:37:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2421 transitions. [2021-11-19 13:37:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:30,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:30,990 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] [2021-11-19 13:37:30,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:31,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:31,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:31,395 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:31,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1506690614, now seen corresponding path program 15 times [2021-11-19 13:37:31,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:31,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12357915] [2021-11-19 13:37:31,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:37:31,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:31,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:31,397 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:31,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-19 13:37:31,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 13:37:31,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:31,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:31,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:31,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:32,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:32,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12357915] [2021-11-19 13:37:32,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12357915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:32,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [273541914] [2021-11-19 13:37:32,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:37:32,028 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:32,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:32,029 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:32,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-19 13:37:32,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 13:37:32,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:32,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:32,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:32,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:32,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [273541914] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:32,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60823954] [2021-11-19 13:37:32,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:37:32,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:37:32,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:32,585 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:37:32,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-19 13:37:32,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 13:37:32,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:32,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:37:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:32,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:33,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60823954] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:33,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 13:37:33,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 20 [2021-11-19 13:37:33,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760349349] [2021-11-19 13:37:33,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:33,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:37:33,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:33,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:37:33,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:37:33,193 INFO L87 Difference]: Start difference. First operand 717 states and 2421 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:34,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:34,168 INFO L93 Difference]: Finished difference Result 1125 states and 3735 transitions. [2021-11-19 13:37:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 13:37:34,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-19 13:37:34,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:34,176 INFO L225 Difference]: With dead ends: 1125 [2021-11-19 13:37:34,176 INFO L226 Difference]: Without dead ends: 1125 [2021-11-19 13:37:34,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2021-11-19 13:37:34,177 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 87 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:34,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 16 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:37:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-11-19 13:37:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 711. [2021-11-19 13:37:34,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 3.363380281690141) internal successors, (2388), 710 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2388 transitions. [2021-11-19 13:37:34,216 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2388 transitions. Word has length 22 [2021-11-19 13:37:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:34,216 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 2388 transitions. [2021-11-19 13:37:34,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2388 transitions. [2021-11-19 13:37:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:34,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:34,220 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] [2021-11-19 13:37:34,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:34,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-19 13:37:34,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2021-11-19 13:37:34,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:34,827 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:34,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:34,828 INFO L85 PathProgramCache]: Analyzing trace with hash -63312886, now seen corresponding path program 16 times [2021-11-19 13:37:34,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:34,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269814904] [2021-11-19 13:37:34,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:37:34,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:34,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:34,829 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:34,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-19 13:37:34,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:37:34,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:34,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:34,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:35,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:35,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:35,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269814904] [2021-11-19 13:37:35,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269814904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:35,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [530357861] [2021-11-19 13:37:35,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:37:35,486 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:35,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:35,487 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:35,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-19 13:37:35,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:37:35,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:35,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:37:35,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:35,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:35,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [530357861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:35,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163505780] [2021-11-19 13:37:35,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:37:35,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:37:35,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:35,991 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:37:35,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-19 13:37:36,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:37:36,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:36,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:37:36,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:36,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:36,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163505780] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:36,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 13:37:36,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 8] total 28 [2021-11-19 13:37:36,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282357481] [2021-11-19 13:37:36,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:36,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:37:36,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:36,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:37:36,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-11-19 13:37:36,510 INFO L87 Difference]: Start difference. First operand 711 states and 2388 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:37,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:37,437 INFO L93 Difference]: Finished difference Result 1251 states and 3981 transitions. [2021-11-19 13:37:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:37:37,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-19 13:37:37,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:37,444 INFO L225 Difference]: With dead ends: 1251 [2021-11-19 13:37:37,444 INFO L226 Difference]: Without dead ends: 1251 [2021-11-19 13:37:37,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 13:37:37,445 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:37,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 23 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:37:37,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-11-19 13:37:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 717. [2021-11-19 13:37:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.36731843575419) internal successors, (2411), 716 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2411 transitions. [2021-11-19 13:37:37,471 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2411 transitions. Word has length 22 [2021-11-19 13:37:37,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:37,471 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 2411 transitions. [2021-11-19 13:37:37,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-19 13:37:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2411 transitions. [2021-11-19 13:37:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:37,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:37,474 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] [2021-11-19 13:37:37,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:37,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-19 13:37:37,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-11-19 13:37:38,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:38,087 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:38,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:38,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2049258646, now seen corresponding path program 17 times [2021-11-19 13:37:38,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:38,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709392270] [2021-11-19 13:37:38,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 13:37:38,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:38,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:38,089 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:38,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-19 13:37:38,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:37:38,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:38,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:38,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:38,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:38,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:38,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709392270] [2021-11-19 13:37:38,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709392270] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:38,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:37:38,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-11-19 13:37:38,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142262797] [2021-11-19 13:37:38,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:38,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:37:38,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:38,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:37:38,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:37:38,688 INFO L87 Difference]: Start difference. First operand 717 states and 2411 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-11-19 13:37:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:39,333 INFO L93 Difference]: Finished difference Result 1091 states and 3558 transitions. [2021-11-19 13:37:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:37:39,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 [2021-11-19 13:37:39,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:39,339 INFO L225 Difference]: With dead ends: 1091 [2021-11-19 13:37:39,339 INFO L226 Difference]: Without dead ends: 1083 [2021-11-19 13:37:39,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:37:39,340 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 115 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:39,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 16 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:37:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-11-19 13:37:39,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 717. [2021-11-19 13:37:39,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.36731843575419) internal successors, (2411), 716 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:39,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2411 transitions. [2021-11-19 13:37:39,369 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2411 transitions. Word has length 22 [2021-11-19 13:37:39,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:39,370 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 2411 transitions. [2021-11-19 13:37:39,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-11-19 13:37:39,370 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2411 transitions. [2021-11-19 13:37:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:39,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:39,373 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] [2021-11-19 13:37:39,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:39,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:39,585 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:39,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:39,586 INFO L85 PathProgramCache]: Analyzing trace with hash -60151250, now seen corresponding path program 18 times [2021-11-19 13:37:39,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:39,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707905249] [2021-11-19 13:37:39,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 13:37:39,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:39,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:39,587 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:39,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-19 13:37:39,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 13:37:39,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:39,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:39,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:39,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:40,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:40,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707905249] [2021-11-19 13:37:40,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707905249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:40,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [756290781] [2021-11-19 13:37:40,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 13:37:40,201 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:40,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:40,202 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:40,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-19 13:37:40,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 13:37:40,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:40,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 13:37:40,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:40,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:40,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [756290781] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:40,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:37:40,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 19 [2021-11-19 13:37:40,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874353377] [2021-11-19 13:37:40,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:40,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:37:40,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:40,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:37:40,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:37:40,722 INFO L87 Difference]: Start difference. First operand 717 states and 2411 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-19 13:37:41,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:41,459 INFO L93 Difference]: Finished difference Result 1095 states and 3535 transitions. [2021-11-19 13:37:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:37:41,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 [2021-11-19 13:37:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:41,462 INFO L225 Difference]: With dead ends: 1095 [2021-11-19 13:37:41,462 INFO L226 Difference]: Without dead ends: 1095 [2021-11-19 13:37:41,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2021-11-19 13:37:41,463 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:41,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 34 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:37:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-11-19 13:37:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 693. [2021-11-19 13:37:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 3.310693641618497) internal successors, (2291), 692 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 2291 transitions. [2021-11-19 13:37:41,489 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 2291 transitions. Word has length 22 [2021-11-19 13:37:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:41,489 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 2291 transitions. [2021-11-19 13:37:41,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-19 13:37:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 2291 transitions. [2021-11-19 13:37:41,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:41,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:41,492 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] [2021-11-19 13:37:41,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:41,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2021-11-19 13:37:41,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:41,905 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:41,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:41,905 INFO L85 PathProgramCache]: Analyzing trace with hash -138128460, now seen corresponding path program 1 times [2021-11-19 13:37:41,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:41,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624713951] [2021-11-19 13:37:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:41,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:41,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:41,910 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:41,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-19 13:37:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:41,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:37:41,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:42,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:42,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:42,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624713951] [2021-11-19 13:37:42,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624713951] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:42,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:37:42,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-19 13:37:42,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677629758] [2021-11-19 13:37:42,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:42,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:37:42,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:42,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:37:42,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:37:42,350 INFO L87 Difference]: Start difference. First operand 693 states and 2291 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-19 13:37:42,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:42,923 INFO L93 Difference]: Finished difference Result 999 states and 3179 transitions. [2021-11-19 13:37:42,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:37:42,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 [2021-11-19 13:37:42,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:42,927 INFO L225 Difference]: With dead ends: 999 [2021-11-19 13:37:42,927 INFO L226 Difference]: Without dead ends: 965 [2021-11-19 13:37:42,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:37:42,927 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 82 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:42,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 13 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:37:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-19 13:37:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 673. [2021-11-19 13:37:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.2827380952380953) internal successors, (2206), 672 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2206 transitions. [2021-11-19 13:37:42,971 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2206 transitions. Word has length 22 [2021-11-19 13:37:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:42,972 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 2206 transitions. [2021-11-19 13:37:42,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-19 13:37:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2206 transitions. [2021-11-19 13:37:42,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:42,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:42,975 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] [2021-11-19 13:37:42,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:43,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:43,181 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:43,181 INFO L85 PathProgramCache]: Analyzing trace with hash 970479200, now seen corresponding path program 1 times [2021-11-19 13:37:43,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:43,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684673403] [2021-11-19 13:37:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:43,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:43,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:43,182 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:43,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-19 13:37:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:37:43,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:43,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:43,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:43,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684673403] [2021-11-19 13:37:43,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684673403] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:43,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:37:43,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-19 13:37:43,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717757322] [2021-11-19 13:37:43,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:43,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:37:43,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:43,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:37:43,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:37:43,541 INFO L87 Difference]: Start difference. First operand 673 states and 2206 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-19 13:37:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:44,107 INFO L93 Difference]: Finished difference Result 1193 states and 3744 transitions. [2021-11-19 13:37:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:37:44,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 [2021-11-19 13:37:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:44,111 INFO L225 Difference]: With dead ends: 1193 [2021-11-19 13:37:44,111 INFO L226 Difference]: Without dead ends: 1149 [2021-11-19 13:37:44,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:37:44,112 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 97 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:44,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 7 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:37:44,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-11-19 13:37:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 699. [2021-11-19 13:37:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.348137535816619) internal successors, (2337), 698 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2337 transitions. [2021-11-19 13:37:44,131 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2337 transitions. Word has length 22 [2021-11-19 13:37:44,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:44,131 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2337 transitions. [2021-11-19 13:37:44,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-19 13:37:44,131 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2337 transitions. [2021-11-19 13:37:44,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:44,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:44,132 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] [2021-11-19 13:37:44,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:44,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:44,333 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:44,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1300125216, now seen corresponding path program 2 times [2021-11-19 13:37:44,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:44,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105743750] [2021-11-19 13:37:44,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:37:44,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:44,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:44,335 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:44,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-19 13:37:44,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:37:44,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:44,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:37:44,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:44,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:44,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:44,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105743750] [2021-11-19 13:37:44,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105743750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:44,817 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:44,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-19 13:37:44,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190962188] [2021-11-19 13:37:44,817 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:44,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:37:44,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:44,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:37:44,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:37:44,818 INFO L87 Difference]: Start difference. First operand 699 states and 2337 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:45,551 INFO L93 Difference]: Finished difference Result 1081 states and 3446 transitions. [2021-11-19 13:37:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 13:37:45,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-11-19 13:37:45,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:45,555 INFO L225 Difference]: With dead ends: 1081 [2021-11-19 13:37:45,555 INFO L226 Difference]: Without dead ends: 1059 [2021-11-19 13:37:45,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:37:45,555 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 238 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:45,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 6 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:37:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-11-19 13:37:45,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 703. [2021-11-19 13:37:45,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.321937321937322) internal successors, (2332), 702 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:45,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2332 transitions. [2021-11-19 13:37:45,574 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2332 transitions. Word has length 22 [2021-11-19 13:37:45,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:45,574 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2332 transitions. [2021-11-19 13:37:45,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:45,574 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2332 transitions. [2021-11-19 13:37:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:45,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:45,577 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] [2021-11-19 13:37:45,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:45,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:45,788 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:45,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1852519866, now seen corresponding path program 3 times [2021-11-19 13:37:45,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:45,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811554355] [2021-11-19 13:37:45,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:37:45,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:45,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:45,790 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:45,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-19 13:37:45,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 13:37:45,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:45,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:37:45,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:46,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:46,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:46,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811554355] [2021-11-19 13:37:46,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811554355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:46,184 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:46,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-19 13:37:46,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318464639] [2021-11-19 13:37:46,185 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:46,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:37:46,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:46,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:37:46,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:37:46,186 INFO L87 Difference]: Start difference. First operand 703 states and 2332 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:46,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:46,830 INFO L93 Difference]: Finished difference Result 861 states and 2758 transitions. [2021-11-19 13:37:46,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:37:46,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-11-19 13:37:46,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:46,833 INFO L225 Difference]: With dead ends: 861 [2021-11-19 13:37:46,833 INFO L226 Difference]: Without dead ends: 827 [2021-11-19 13:37:46,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:37:46,834 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 170 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:46,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 11 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:37:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-11-19 13:37:46,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 701. [2021-11-19 13:37:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 3.322857142857143) internal successors, (2326), 700 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:46,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2326 transitions. [2021-11-19 13:37:46,857 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2326 transitions. Word has length 22 [2021-11-19 13:37:46,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:46,858 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 2326 transitions. [2021-11-19 13:37:46,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:46,858 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2326 transitions. [2021-11-19 13:37:46,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:46,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:46,860 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] [2021-11-19 13:37:46,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:47,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:47,066 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:47,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:47,066 INFO L85 PathProgramCache]: Analyzing trace with hash 775981264, now seen corresponding path program 2 times [2021-11-19 13:37:47,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:47,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573926455] [2021-11-19 13:37:47,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:37:47,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:47,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:47,068 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:47,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-19 13:37:47,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:37:47,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:47,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:37:47,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:47,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:47,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:47,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573926455] [2021-11-19 13:37:47,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573926455] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:47,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:37:47,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:37:47,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152063743] [2021-11-19 13:37:47,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:47,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:37:47,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:47,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:37:47,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:37:47,453 INFO L87 Difference]: Start difference. First operand 701 states and 2326 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) [2021-11-19 13:37:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:47,753 INFO L93 Difference]: Finished difference Result 767 states and 2404 transitions. [2021-11-19 13:37:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:37:47,754 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 [2021-11-19 13:37:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:47,756 INFO L225 Difference]: With dead ends: 767 [2021-11-19 13:37:47,756 INFO L226 Difference]: Without dead ends: 737 [2021-11-19 13:37:47,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:37:47,757 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 51 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:47,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 13 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:37:47,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-11-19 13:37:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 645. [2021-11-19 13:37:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.2872670807453415) internal successors, (2117), 644 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2117 transitions. [2021-11-19 13:37:47,778 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2117 transitions. Word has length 22 [2021-11-19 13:37:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:47,778 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 2117 transitions. [2021-11-19 13:37:47,778 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) [2021-11-19 13:37:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2117 transitions. [2021-11-19 13:37:47,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:47,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:47,781 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] [2021-11-19 13:37:47,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:47,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:47,993 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:47,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:47,993 INFO L85 PathProgramCache]: Analyzing trace with hash 640788566, now seen corresponding path program 4 times [2021-11-19 13:37:47,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:47,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113655652] [2021-11-19 13:37:47,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:37:47,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:47,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:47,994 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:47,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-19 13:37:48,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:37:48,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:37:48,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:48,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:48,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:48,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113655652] [2021-11-19 13:37:48,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113655652] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:48,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:37:48,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-19 13:37:48,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200384899] [2021-11-19 13:37:48,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:48,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:37:48,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:48,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:37:48,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:37:48,342 INFO L87 Difference]: Start difference. First operand 645 states and 2117 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-19 13:37:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:48,876 INFO L93 Difference]: Finished difference Result 1125 states and 3631 transitions. [2021-11-19 13:37:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:37:48,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 [2021-11-19 13:37:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:48,879 INFO L225 Difference]: With dead ends: 1125 [2021-11-19 13:37:48,879 INFO L226 Difference]: Without dead ends: 1093 [2021-11-19 13:37:48,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:37:48,880 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 107 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:48,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 5 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:37:48,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-11-19 13:37:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 661. [2021-11-19 13:37:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 3.316666666666667) internal successors, (2189), 660 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 2189 transitions. [2021-11-19 13:37:48,899 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 2189 transitions. Word has length 22 [2021-11-19 13:37:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:48,899 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 2189 transitions. [2021-11-19 13:37:48,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-19 13:37:48,899 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 2189 transitions. [2021-11-19 13:37:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:48,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:48,902 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] [2021-11-19 13:37:48,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:49,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:49,103 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:49,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:49,103 INFO L85 PathProgramCache]: Analyzing trace with hash 970434582, now seen corresponding path program 5 times [2021-11-19 13:37:49,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:49,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108099967] [2021-11-19 13:37:49,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 13:37:49,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:49,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:49,104 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:49,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-19 13:37:49,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:37:49,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:49,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:37:49,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:49,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:49,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:49,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108099967] [2021-11-19 13:37:49,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108099967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:49,566 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:49,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-19 13:37:49,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386781430] [2021-11-19 13:37:49,567 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:49,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:37:49,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:49,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:37:49,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:37:49,568 INFO L87 Difference]: Start difference. First operand 661 states and 2189 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:50,350 INFO L93 Difference]: Finished difference Result 1175 states and 3923 transitions. [2021-11-19 13:37:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 13:37:50,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-11-19 13:37:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:50,359 INFO L225 Difference]: With dead ends: 1175 [2021-11-19 13:37:50,359 INFO L226 Difference]: Without dead ends: 1153 [2021-11-19 13:37:50,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:37:50,360 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 139 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:50,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 12 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:37:50,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-11-19 13:37:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 735. [2021-11-19 13:37:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.3405994550408717) internal successors, (2452), 734 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2452 transitions. [2021-11-19 13:37:50,391 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2452 transitions. Word has length 22 [2021-11-19 13:37:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:50,392 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2452 transitions. [2021-11-19 13:37:50,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2452 transitions. [2021-11-19 13:37:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 13:37:50,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:50,394 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] [2021-11-19 13:37:50,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:50,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:50,607 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:50,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:50,608 INFO L85 PathProgramCache]: Analyzing trace with hash -453371386, now seen corresponding path program 6 times [2021-11-19 13:37:50,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:50,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859721022] [2021-11-19 13:37:50,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 13:37:50,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:50,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:50,610 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:50,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-19 13:37:50,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 13:37:50,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:50,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:37:50,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:50,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:50,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:50,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859721022] [2021-11-19 13:37:50,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859721022] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:50,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:37:50,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-19 13:37:50,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103835331] [2021-11-19 13:37:50,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:50,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:37:50,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:50,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:37:50,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:37:50,971 INFO L87 Difference]: Start difference. First operand 735 states and 2452 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-19 13:37:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:51,375 INFO L93 Difference]: Finished difference Result 797 states and 2617 transitions. [2021-11-19 13:37:51,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:37:51,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 [2021-11-19 13:37:51,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:51,378 INFO L225 Difference]: With dead ends: 797 [2021-11-19 13:37:51,378 INFO L226 Difference]: Without dead ends: 698 [2021-11-19 13:37:51,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:37:51,378 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:51,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 11 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:37:51,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-11-19 13:37:51,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 480. [2021-11-19 13:37:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.3319415448851775) internal successors, (1596), 479 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1596 transitions. [2021-11-19 13:37:51,390 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1596 transitions. Word has length 22 [2021-11-19 13:37:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:51,390 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1596 transitions. [2021-11-19 13:37:51,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-19 13:37:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1596 transitions. [2021-11-19 13:37:51,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 13:37:51,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:51,391 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:51,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:51,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:51,592 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash -678870224, now seen corresponding path program 1 times [2021-11-19 13:37:51,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:51,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902897949] [2021-11-19 13:37:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:51,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:51,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:51,593 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:51,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-19 13:37:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:51,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:37:51,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:51,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:37:52,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:52,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902897949] [2021-11-19 13:37:52,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902897949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:52,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1961820529] [2021-11-19 13:37:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:52,069 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:52,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:52,070 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:52,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-11-19 13:37:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:52,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:37:52,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:52,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:52,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1961820529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:52,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188150617] [2021-11-19 13:37:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:52,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:37:52,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:52,619 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:37:52,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-19 13:37:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:52,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:37:52,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:37:52,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:37:53,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188150617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:53,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:37:53,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6, 6, 6, 6] total 24 [2021-11-19 13:37:53,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584101481] [2021-11-19 13:37:53,046 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:37:53,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 13:37:53,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:53,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 13:37:53,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-11-19 13:37:53,047 INFO L87 Difference]: Start difference. First operand 480 states and 1596 transitions. Second operand has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 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) [2021-11-19 13:37:55,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:55,290 INFO L93 Difference]: Finished difference Result 1464 states and 4800 transitions. [2021-11-19 13:37:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 13:37:55,291 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 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) Word has length 24 [2021-11-19 13:37:55,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:55,294 INFO L225 Difference]: With dead ends: 1464 [2021-11-19 13:37:55,294 INFO L226 Difference]: Without dead ends: 1464 [2021-11-19 13:37:55,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 13:37:55,296 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 452 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:55,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 97 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 13:37:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-11-19 13:37:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 520. [2021-11-19 13:37:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 3.296724470134875) internal successors, (1711), 519 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:55,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1711 transitions. [2021-11-19 13:37:55,315 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1711 transitions. Word has length 24 [2021-11-19 13:37:55,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:55,316 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1711 transitions. [2021-11-19 13:37:55,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 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) [2021-11-19 13:37:55,316 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1711 transitions. [2021-11-19 13:37:55,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 13:37:55,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:55,317 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] [2021-11-19 13:37:55,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:55,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-19 13:37:55,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2021-11-19 13:37:55,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:55,918 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 13:37:55,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:55,918 INFO L85 PathProgramCache]: Analyzing trace with hash 179608233, now seen corresponding path program 1 times [2021-11-19 13:37:55,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:55,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763350509] [2021-11-19 13:37:55,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:55,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:55,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:55,920 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:55,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3435e75b-b4d7-4e51-83c8-3a62da60d2e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-19 13:37:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:56,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-19 13:37:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:56,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-19 13:37:56,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2021-11-19 13:38:03,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:38:03,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:38:03,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:38:03,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:38:03,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:38:03,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:38:03,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:38:03,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:38:03,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:38:03,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:38:03,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:38:04,659 INFO L354 Elim1Store]: treesize reduction 1479, result has 12.9 percent of original size [2021-11-19 13:38:04,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 104 treesize of output 264 [2021-11-19 13:45:23,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:45:23,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:45:23,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:45:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:45:23,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:45:23,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:45:23,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:45:23,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:45:23,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:45:23,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:45:23,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:47:16,417 WARN L227 SmtUtils]: Spent 1.88m on a formula simplification. DAG size of input: 524 DAG size of output: 232 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 13:47:16,419 INFO L354 Elim1Store]: treesize reduction 2291, result has 24.0 percent of original size [2021-11-19 13:47:16,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 81 case distinctions, treesize of input 274 treesize of output 916