./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE --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 300cfdff355e4aa147bd43a6787569c6a2870fe2710a35fc3639b216d2945f8b ............................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE --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 300cfdff355e4aa147bd43a6787569c6a2870fe2710a35fc3639b216d2945f8b .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:19:13,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:19:13,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:19:13,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:19:13,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:19:13,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:19:13,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:19:13,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:19:13,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:19:13,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:19:13,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:19:13,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:19:13,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:19:13,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:19:13,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:19:13,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:19:13,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:19:13,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:19:13,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:19:13,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:19:13,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:19:13,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:19:13,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:19:13,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:19:13,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:19:13,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:19:13,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:19:13,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:19:13,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:19:13,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:19:13,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:19:13,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:19:13,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:19:13,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:19:13,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:19:13,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:19:13,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:19:13,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:19:13,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:19:13,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:19:13,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:19:13,182 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 11:19:13,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:19:13,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:19:13,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:19:13,210 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:19:13,210 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:19:13,211 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:19:13,211 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:19:13,211 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:19:13,212 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:19:13,212 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:19:13,212 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:19:13,212 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:19:13,213 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:19:13,213 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:19:13,213 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:19:13,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:19:13,214 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:19:13,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:19:13,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:19:13,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:19:13,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:19:13,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:19:13,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:19:13,216 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:19:13,216 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:19:13,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:19:13,217 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:19:13,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:19:13,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:19:13,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:19:13,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:19:13,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:19:13,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:19:13,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:19:13,219 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:19:13,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:19:13,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:19:13,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:19:13,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:19:13,220 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_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 300cfdff355e4aa147bd43a6787569c6a2870fe2710a35fc3639b216d2945f8b [2021-10-24 11:19:13,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:19:13,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:19:13,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:19:13,477 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:19:13,497 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:19:13,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2021-10-24 11:19:13,590 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/data/d9a7dd4dd/a8c1fab3c1524898acca9d4dad2d24a8/FLAG277586953 [2021-10-24 11:19:14,073 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:19:14,074 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2021-10-24 11:19:14,084 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/data/d9a7dd4dd/a8c1fab3c1524898acca9d4dad2d24a8/FLAG277586953 [2021-10-24 11:19:14,464 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/data/d9a7dd4dd/a8c1fab3c1524898acca9d4dad2d24a8 [2021-10-24 11:19:14,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:19:14,468 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:19:14,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:19:14,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:19:14,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:19:14,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:19:14" (1/1) ... [2021-10-24 11:19:14,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e9added and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:14, skipping insertion in model container [2021-10-24 11:19:14,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:19:14" (1/1) ... [2021-10-24 11:19:14,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:19:14,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:19:14,746 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2671,2684] [2021-10-24 11:19:14,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:19:14,770 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) [2021-10-24 11:19:14,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d998844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:14, skipping insertion in model container [2021-10-24 11:19:14,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:19:14,771 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-24 11:19:14,773 INFO L168 Benchmark]: Toolchain (without parser) took 303.78 ms. Allocated memory is still 136.3 MB. Free memory was 103.0 MB in the beginning and 113.6 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:14,775 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 86.0 MB. Free memory was 60.8 MB in the beginning and 60.8 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:19:14,776 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.89 ms. Allocated memory is still 136.3 MB. Free memory was 102.7 MB in the beginning and 113.6 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:14,779 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 86.0 MB. Free memory was 60.8 MB in the beginning and 60.8 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 300.89 ms. Allocated memory is still 136.3 MB. Free memory was 102.7 MB in the beginning and 113.6 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:19:17,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:19:17,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:19:17,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:19:17,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:19:17,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:19:17,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:19:17,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:19:17,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:19:17,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:19:17,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:19:17,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:19:17,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:19:17,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:19:17,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:19:17,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:19:17,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:19:17,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:19:17,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:19:17,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:19:17,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:19:17,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:19:17,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:19:17,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:19:17,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:19:17,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:19:17,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:19:17,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:19:17,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:19:17,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:19:17,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:19:17,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:19:17,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:19:17,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:19:17,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:19:17,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:19:17,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:19:17,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:19:17,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:19:17,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:19:17,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:19:17,395 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 11:19:17,460 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:19:17,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:19:17,462 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:19:17,462 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:19:17,463 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:19:17,463 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:19:17,463 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:19:17,464 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:19:17,465 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:19:17,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:19:17,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:19:17,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:19:17,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:19:17,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:19:17,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:19:17,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:19:17,470 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:19:17,470 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 11:19:17,471 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 11:19:17,471 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:19:17,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:19:17,472 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:19:17,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:19:17,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:19:17,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 11:19:17,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:19:17,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:19:17,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:19:17,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:19:17,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:19:17,475 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 11:19:17,475 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 11:19:17,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:19:17,475 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:19:17,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:19:17,477 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_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 300cfdff355e4aa147bd43a6787569c6a2870fe2710a35fc3639b216d2945f8b [2021-10-24 11:19:17,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:19:17,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:19:17,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:19:17,955 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:19:17,956 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:19:17,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2021-10-24 11:19:18,040 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/data/bb60410fb/e8d045204a5e42c09df4dc164e3c9c2e/FLAGf32885756 [2021-10-24 11:19:18,708 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:19:18,709 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2021-10-24 11:19:18,722 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/data/bb60410fb/e8d045204a5e42c09df4dc164e3c9c2e/FLAGf32885756 [2021-10-24 11:19:19,039 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/data/bb60410fb/e8d045204a5e42c09df4dc164e3c9c2e [2021-10-24 11:19:19,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:19:19,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:19:19,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:19:19,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:19:19,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:19:19,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:19:19" (1/1) ... [2021-10-24 11:19:19,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2699adc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:19, skipping insertion in model container [2021-10-24 11:19:19,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:19:19" (1/1) ... [2021-10-24 11:19:19,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:19:19,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:19:19,441 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2671,2684] [2021-10-24 11:19:19,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:19:19,494 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-24 11:19:19,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:19:19,555 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2671,2684] [2021-10-24 11:19:19,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:19:19,574 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:19:19,622 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2671,2684] [2021-10-24 11:19:19,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:19:19,671 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:19:19,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:19 WrapperNode [2021-10-24 11:19:19,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:19:19,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:19:19,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:19:19,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:19:19,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:19" (1/1) ... [2021-10-24 11:19:19,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:19" (1/1) ... [2021-10-24 11:19:19,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:19:19,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:19:19,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:19:19,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:19:19,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:19" (1/1) ... [2021-10-24 11:19:19,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:19" (1/1) ... [2021-10-24 11:19:19,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:19" (1/1) ... [2021-10-24 11:19:19,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:19" (1/1) ... [2021-10-24 11:19:19,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:19" (1/1) ... [2021-10-24 11:19:19,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:19" (1/1) ... [2021-10-24 11:19:19,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:19" (1/1) ... [2021-10-24 11:19:19,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:19:19,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:19:19,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:19:19,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:19:19,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:19" (1/1) ... [2021-10-24 11:19:19,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:19:19,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:19:19,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:19:19,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:19:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 11:19:19,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:19:19,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 11:19:19,950 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-24 11:19:19,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-24 11:19:19,951 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-24 11:19:19,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-24 11:19:19,951 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-24 11:19:19,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-24 11:19:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-24 11:19:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-24 11:19:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 11:19:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:19:19,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:19:19,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 11:19:19,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 11:19:19,955 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-24 11:19:21,452 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:19:21,453 INFO L299 CfgBuilder]: Removed 44 assume(true) statements. [2021-10-24 11:19:21,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:19:21 BoogieIcfgContainer [2021-10-24 11:19:21,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:19:21,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:19:21,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:19:21,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:19:21,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:19:19" (1/3) ... [2021-10-24 11:19:21,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51132c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:19:21, skipping insertion in model container [2021-10-24 11:19:21,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:19" (2/3) ... [2021-10-24 11:19:21,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51132c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:19:21, skipping insertion in model container [2021-10-24 11:19:21,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:19:21" (3/3) ... [2021-10-24 11:19:21,469 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2021-10-24 11:19:21,477 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-24 11:19:21,477 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:19:21,477 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 11:19:21,478 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-24 11:19:21,551 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,551 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,553 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,553 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,554 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,554 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,555 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,555 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,555 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,556 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,556 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,556 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,556 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,559 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,559 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,560 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,560 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,561 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,561 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,561 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,561 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,562 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,562 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,562 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,563 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,563 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,563 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,563 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,565 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,565 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,565 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,565 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,566 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,566 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,567 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,567 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,567 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,567 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,568 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,568 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,568 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,569 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,569 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,569 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,570 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,570 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,571 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,572 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,573 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,574 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,578 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,579 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,579 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,579 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,579 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,580 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,580 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,581 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,581 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,581 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,594 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,594 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,594 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,594 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,595 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,595 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,596 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,597 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,600 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,601 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,601 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,602 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,604 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,605 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,605 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,605 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,605 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,612 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,613 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,613 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,613 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,613 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,614 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,614 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,614 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,620 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,621 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,621 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,621 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,621 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,622 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,622 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,622 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,624 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,624 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,624 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,625 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,625 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,625 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,625 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,626 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,626 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,626 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,626 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,627 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,627 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,627 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,627 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,628 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,628 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,628 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,629 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,629 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,629 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,629 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,630 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,630 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,630 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,630 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,631 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,631 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,631 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,631 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,632 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,632 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,632 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,632 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,633 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,633 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,633 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,633 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,634 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,634 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,634 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,634 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,634 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,639 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,639 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,639 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,640 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,640 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,642 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,647 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,647 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,648 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,648 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,648 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,648 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,648 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,649 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,651 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,651 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,651 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,652 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,652 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,652 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,652 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,653 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,653 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,653 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,653 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,653 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,654 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,654 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:19:21,666 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-24 11:19:21,710 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:19:21,717 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 [2021-10-24 11:19:21,718 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-24 11:19:21,743 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-24 11:19:21,759 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 257 transitions, 538 flow [2021-10-24 11:19:21,768 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 257 transitions, 538 flow [2021-10-24 11:19:21,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 241 places, 257 transitions, 538 flow [2021-10-24 11:19:21,946 INFO L129 PetriNetUnfolder]: 26/254 cut-off events. [2021-10-24 11:19:21,946 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-24 11:19:21,952 INFO L84 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 254 events. 26/254 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 218 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 210. Up to 3 conditions per place. [2021-10-24 11:19:21,958 INFO L116 LiptonReduction]: Number of co-enabled transitions 3162 [2021-10-24 11:20:16,546 INFO L131 LiptonReduction]: Checked pairs total: 5729 [2021-10-24 11:20:16,546 INFO L133 LiptonReduction]: Total number of compositions: 271 [2021-10-24 11:20:16,556 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 41 transitions, 106 flow [2021-10-24 11:20:16,604 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 313 states, 312 states have (on average 3.676282051282051) internal successors, (1147), 312 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 313 states, 312 states have (on average 3.676282051282051) internal successors, (1147), 312 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:20:16,639 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:16,640 INFO L512 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] [2021-10-24 11:20:16,641 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:16,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:16,650 INFO L82 PathProgramCache]: Analyzing trace with hash 401556214, now seen corresponding path program 1 times [2021-10-24 11:20:16,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:16,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998212334] [2021-10-24 11:20:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:20:16,670 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:16,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:16,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:16,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 11:20:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:20:16,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:20:16,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:20:17,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:20:17,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:17,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998212334] [2021-10-24 11:20:17,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998212334] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:17,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:17,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-10-24 11:20:17,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076912557] [2021-10-24 11:20:17,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 11:20:17,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:17,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 11:20:17,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:20:17,296 INFO L87 Difference]: Start difference. First operand has 313 states, 312 states have (on average 3.676282051282051) internal successors, (1147), 312 states have internal predecessors, (1147), 0 states have call successors, (0), 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 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:18,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:18,291 INFO L93 Difference]: Finished difference Result 314 states and 1148 transitions. [2021-10-24 11:20:18,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:20:18,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-24 11:20:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:18,314 INFO L225 Difference]: With dead ends: 314 [2021-10-24 11:20:18,315 INFO L226 Difference]: Without dead ends: 314 [2021-10-24 11:20:18,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:20:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-10-24 11:20:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2021-10-24 11:20:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.6677316293929714) internal successors, (1148), 313 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1148 transitions. [2021-10-24 11:20:18,407 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1148 transitions. Word has length 22 [2021-10-24 11:20:18,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:18,408 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1148 transitions. [2021-10-24 11:20:18,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1148 transitions. [2021-10-24 11:20:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-24 11:20:18,413 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:18,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:18,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:18,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:18,639 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:18,640 INFO L82 PathProgramCache]: Analyzing trace with hash 803731460, now seen corresponding path program 1 times [2021-10-24 11:20:18,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:18,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864632102] [2021-10-24 11:20:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:20:18,642 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:18,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:18,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:18,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 11:20:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:20:18,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:20:18,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:20:19,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:20:19,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:19,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864632102] [2021-10-24 11:20:19,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864632102] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:19,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:19,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [] total 7 [2021-10-24 11:20:19,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887010798] [2021-10-24 11:20:19,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 11:20:19,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:19,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 11:20:19,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-24 11:20:19,202 INFO L87 Difference]: Start difference. First operand 314 states and 1148 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-10-24 11:20:20,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:20,078 INFO L93 Difference]: Finished difference Result 316 states and 1150 transitions. [2021-10-24 11:20:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:20:20,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 23 [2021-10-24 11:20:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:20,085 INFO L225 Difference]: With dead ends: 316 [2021-10-24 11:20:20,086 INFO L226 Difference]: Without dead ends: 316 [2021-10-24 11:20:20,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:20:20,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-10-24 11:20:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-10-24 11:20:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.6507936507936507) internal successors, (1150), 315 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1150 transitions. [2021-10-24 11:20:20,130 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1150 transitions. Word has length 23 [2021-10-24 11:20:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:20,130 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 1150 transitions. [2021-10-24 11:20:20,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-10-24 11:20:20,130 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1150 transitions. [2021-10-24 11:20:20,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-24 11:20:20,132 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:20,133 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:20,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:20,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:20,349 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:20,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:20,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2020941283, now seen corresponding path program 1 times [2021-10-24 11:20:20,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:20,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878991073] [2021-10-24 11:20:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:20:20,351 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:20,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:20,353 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:20,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 11:20:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:20:20,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 11:20:20,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:21,462 INFO L354 Elim1Store]: treesize reduction 156, result has 58.2 percent of original size [2021-10-24 11:20:21,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 124 treesize of output 252 [2021-10-24 11:20:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:22,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:23,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:23,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878991073] [2021-10-24 11:20:23,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878991073] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:23,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:23,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-24 11:20:23,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002129985] [2021-10-24 11:20:23,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:20:23,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:23,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:20:23,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:20:23,023 INFO L87 Difference]: Start difference. First operand 316 states and 1150 transitions. Second operand has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:23,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:23,197 INFO L93 Difference]: Finished difference Result 609 states and 2245 transitions. [2021-10-24 11:20:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:20:23,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-24 11:20:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:23,207 INFO L225 Difference]: With dead ends: 609 [2021-10-24 11:20:23,207 INFO L226 Difference]: Without dead ends: 594 [2021-10-24 11:20:23,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:20:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-10-24 11:20:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 416. [2021-10-24 11:20:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.744578313253012) internal successors, (1554), 415 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1554 transitions. [2021-10-24 11:20:23,259 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1554 transitions. Word has length 25 [2021-10-24 11:20:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:23,261 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1554 transitions. [2021-10-24 11:20:23,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1554 transitions. [2021-10-24 11:20:23,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:20:23,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:23,264 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:23,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:23,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:23,483 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:23,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:23,483 INFO L82 PathProgramCache]: Analyzing trace with hash -844980366, now seen corresponding path program 1 times [2021-10-24 11:20:23,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:23,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800443566] [2021-10-24 11:20:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:20:23,485 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:23,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:23,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:23,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 11:20:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:20:23,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 11:20:23,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:23,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:23,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:23,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800443566] [2021-10-24 11:20:23,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800443566] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:23,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:23,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-24 11:20:23,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024477079] [2021-10-24 11:20:23,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 11:20:23,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:23,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 11:20:23,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:20:23,982 INFO L87 Difference]: Start difference. First operand 416 states and 1554 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:25,038 INFO L93 Difference]: Finished difference Result 640 states and 2267 transitions. [2021-10-24 11:20:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:20:25,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:20:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:25,048 INFO L225 Difference]: With dead ends: 640 [2021-10-24 11:20:25,048 INFO L226 Difference]: Without dead ends: 620 [2021-10-24 11:20:25,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:20:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-10-24 11:20:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 494. [2021-10-24 11:20:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.665314401622718) internal successors, (1807), 493 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1807 transitions. [2021-10-24 11:20:25,082 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1807 transitions. Word has length 28 [2021-10-24 11:20:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:25,083 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1807 transitions. [2021-10-24 11:20:25,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:25,084 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1807 transitions. [2021-10-24 11:20:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:20:25,087 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:25,087 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:25,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:25,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:25,306 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:25,307 INFO L82 PathProgramCache]: Analyzing trace with hash 972025783, now seen corresponding path program 1 times [2021-10-24 11:20:25,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:25,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63081589] [2021-10-24 11:20:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:20:25,308 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:25,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:25,311 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:25,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 11:20:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:20:25,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:20:25,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:25,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:26,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:26,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63081589] [2021-10-24 11:20:26,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63081589] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:26,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:26,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:20:26,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905629506] [2021-10-24 11:20:26,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:20:26,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:26,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:20:26,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:20:26,028 INFO L87 Difference]: Start difference. First operand 494 states and 1807 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:28,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:28,241 INFO L93 Difference]: Finished difference Result 1150 states and 4246 transitions. [2021-10-24 11:20:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 11:20:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:20:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:28,257 INFO L225 Difference]: With dead ends: 1150 [2021-10-24 11:20:28,257 INFO L226 Difference]: Without dead ends: 1120 [2021-10-24 11:20:28,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-10-24 11:20:28,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-10-24 11:20:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 620. [2021-10-24 11:20:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.6623586429725363) internal successors, (2267), 619 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2267 transitions. [2021-10-24 11:20:28,312 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2267 transitions. Word has length 28 [2021-10-24 11:20:28,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:28,313 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 2267 transitions. [2021-10-24 11:20:28,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2267 transitions. [2021-10-24 11:20:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:20:28,317 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:28,317 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:28,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:28,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:28,534 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:28,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:28,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1538228687, now seen corresponding path program 2 times [2021-10-24 11:20:28,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:28,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735017506] [2021-10-24 11:20:28,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:20:28,535 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:28,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:28,542 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:28,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 11:20:28,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:20:28,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:20:28,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:20:28,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:29,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:29,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:29,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735017506] [2021-10-24 11:20:29,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735017506] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:29,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:29,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:20:29,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686744800] [2021-10-24 11:20:29,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:20:29,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:29,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:20:29,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:20:29,370 INFO L87 Difference]: Start difference. First operand 620 states and 2267 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:32,186 INFO L93 Difference]: Finished difference Result 1662 states and 6484 transitions. [2021-10-24 11:20:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 11:20:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:20:32,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:32,210 INFO L225 Difference]: With dead ends: 1662 [2021-10-24 11:20:32,210 INFO L226 Difference]: Without dead ends: 1612 [2021-10-24 11:20:32,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:20:32,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-10-24 11:20:32,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 872. [2021-10-24 11:20:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.970149253731343) internal successors, (3458), 871 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 3458 transitions. [2021-10-24 11:20:32,298 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 3458 transitions. Word has length 28 [2021-10-24 11:20:32,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:32,298 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 3458 transitions. [2021-10-24 11:20:32,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:32,299 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 3458 transitions. [2021-10-24 11:20:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:20:32,304 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:32,304 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:32,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:32,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:32,522 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:32,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:32,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1537709877, now seen corresponding path program 3 times [2021-10-24 11:20:32,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:32,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768958577] [2021-10-24 11:20:32,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:20:32,523 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:32,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:32,524 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:32,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-24 11:20:32,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:20:32,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:20:32,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:20:32,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:33,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:33,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:33,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768958577] [2021-10-24 11:20:33,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768958577] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:33,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:33,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:20:33,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851074723] [2021-10-24 11:20:33,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:20:33,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:33,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:20:33,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:20:33,422 INFO L87 Difference]: Start difference. First operand 872 states and 3458 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:34,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:34,891 INFO L93 Difference]: Finished difference Result 1620 states and 6061 transitions. [2021-10-24 11:20:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 11:20:34,893 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:20:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:34,914 INFO L225 Difference]: With dead ends: 1620 [2021-10-24 11:20:34,914 INFO L226 Difference]: Without dead ends: 1620 [2021-10-24 11:20:34,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:20:34,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-10-24 11:20:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 974. [2021-10-24 11:20:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 3.935251798561151) internal successors, (3829), 973 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 3829 transitions. [2021-10-24 11:20:34,988 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 3829 transitions. Word has length 28 [2021-10-24 11:20:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:34,989 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 3829 transitions. [2021-10-24 11:20:34,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 3829 transitions. [2021-10-24 11:20:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:20:34,994 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:34,994 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:35,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:35,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:35,210 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:35,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:35,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1818244819, now seen corresponding path program 4 times [2021-10-24 11:20:35,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:35,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524140171] [2021-10-24 11:20:35,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 11:20:35,213 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:35,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:35,214 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:35,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-24 11:20:35,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 11:20:35,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:20:35,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:20:35,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:35,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:35,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:35,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524140171] [2021-10-24 11:20:35,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524140171] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:35,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:35,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:20:35,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894312411] [2021-10-24 11:20:35,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:20:35,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:35,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:20:35,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:20:35,922 INFO L87 Difference]: Start difference. First operand 974 states and 3829 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:37,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:37,435 INFO L93 Difference]: Finished difference Result 1152 states and 4381 transitions. [2021-10-24 11:20:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 11:20:37,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:20:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:37,451 INFO L225 Difference]: With dead ends: 1152 [2021-10-24 11:20:37,451 INFO L226 Difference]: Without dead ends: 1152 [2021-10-24 11:20:37,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-10-24 11:20:37,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-10-24 11:20:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 880. [2021-10-24 11:20:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.9180887372013653) internal successors, (3444), 879 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3444 transitions. [2021-10-24 11:20:37,503 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3444 transitions. Word has length 28 [2021-10-24 11:20:37,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:37,504 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 3444 transitions. [2021-10-24 11:20:37,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:37,504 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3444 transitions. [2021-10-24 11:20:37,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:20:37,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:37,520 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:37,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:37,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:37,735 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:37,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1167313669, now seen corresponding path program 5 times [2021-10-24 11:20:37,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:37,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585239644] [2021-10-24 11:20:37,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 11:20:37,737 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:37,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:37,738 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:37,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-24 11:20:38,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:20:38,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:20:38,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:20:38,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:38,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:38,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:38,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585239644] [2021-10-24 11:20:38,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585239644] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:38,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:38,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:20:38,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561726831] [2021-10-24 11:20:38,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:20:38,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:38,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:20:38,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:20:38,583 INFO L87 Difference]: Start difference. First operand 880 states and 3444 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:41,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:41,576 INFO L93 Difference]: Finished difference Result 1958 states and 7543 transitions. [2021-10-24 11:20:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-24 11:20:41,577 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:20:41,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:41,599 INFO L225 Difference]: With dead ends: 1958 [2021-10-24 11:20:41,599 INFO L226 Difference]: Without dead ends: 1864 [2021-10-24 11:20:41,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-10-24 11:20:41,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-10-24 11:20:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 848. [2021-10-24 11:20:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.689492325855962) internal successors, (3125), 847 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:41,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 3125 transitions. [2021-10-24 11:20:41,655 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 3125 transitions. Word has length 28 [2021-10-24 11:20:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:41,656 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 3125 transitions. [2021-10-24 11:20:41,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 3125 transitions. [2021-10-24 11:20:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:20:41,661 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:41,661 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:41,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:41,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:41,877 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash 2130325855, now seen corresponding path program 6 times [2021-10-24 11:20:41,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:41,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302662517] [2021-10-24 11:20:41,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 11:20:41,878 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:41,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:41,879 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:41,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-24 11:20:42,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-24 11:20:42,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:20:42,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:20:42,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:42,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:42,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:42,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302662517] [2021-10-24 11:20:42,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302662517] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:42,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:42,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:20:42,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608159087] [2021-10-24 11:20:42,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:20:42,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:42,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:20:42,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:20:42,650 INFO L87 Difference]: Start difference. First operand 848 states and 3125 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:43,739 INFO L93 Difference]: Finished difference Result 940 states and 3370 transitions. [2021-10-24 11:20:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 11:20:43,740 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:20:43,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:43,749 INFO L225 Difference]: With dead ends: 940 [2021-10-24 11:20:43,749 INFO L226 Difference]: Without dead ends: 924 [2021-10-24 11:20:43,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-10-24 11:20:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-10-24 11:20:43,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 844. [2021-10-24 11:20:43,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.6892052194543297) internal successors, (3110), 843 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 3110 transitions. [2021-10-24 11:20:43,801 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 3110 transitions. Word has length 28 [2021-10-24 11:20:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:43,801 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 3110 transitions. [2021-10-24 11:20:43,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 3110 transitions. [2021-10-24 11:20:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:20:43,806 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:43,806 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:43,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:44,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:44,022 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:44,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:44,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1369706567, now seen corresponding path program 7 times [2021-10-24 11:20:44,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:44,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670646910] [2021-10-24 11:20:44,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 11:20:44,023 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:44,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:44,024 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:44,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-24 11:20:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:20:44,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:20:44,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:44,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:44,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:44,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670646910] [2021-10-24 11:20:44,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670646910] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:44,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:44,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:20:44,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36503861] [2021-10-24 11:20:44,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:20:44,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:44,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:20:44,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:20:44,715 INFO L87 Difference]: Start difference. First operand 844 states and 3110 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:45,568 INFO L93 Difference]: Finished difference Result 1048 states and 3732 transitions. [2021-10-24 11:20:45,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 11:20:45,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:20:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:45,577 INFO L225 Difference]: With dead ends: 1048 [2021-10-24 11:20:45,578 INFO L226 Difference]: Without dead ends: 1036 [2021-10-24 11:20:45,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-10-24 11:20:45,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-10-24 11:20:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 862. [2021-10-24 11:20:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.7026713124274098) internal successors, (3188), 861 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 3188 transitions. [2021-10-24 11:20:45,628 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 3188 transitions. Word has length 28 [2021-10-24 11:20:45,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:45,629 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 3188 transitions. [2021-10-24 11:20:45,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 3188 transitions. [2021-10-24 11:20:45,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:20:45,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:45,634 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:45,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:45,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:45,847 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:45,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:45,847 INFO L82 PathProgramCache]: Analyzing trace with hash -293498077, now seen corresponding path program 8 times [2021-10-24 11:20:45,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:45,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977939914] [2021-10-24 11:20:45,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:20:45,848 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:45,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:45,849 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:45,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-24 11:20:46,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:20:46,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:20:46,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:20:46,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:46,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:46,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:46,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977939914] [2021-10-24 11:20:46,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977939914] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:20:46,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 11:20:46,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-10-24 11:20:46,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352970922] [2021-10-24 11:20:46,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 11:20:46,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:46,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 11:20:46,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:20:46,643 INFO L87 Difference]: Start difference. First operand 862 states and 3188 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:47,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:47,717 INFO L93 Difference]: Finished difference Result 1084 states and 3950 transitions. [2021-10-24 11:20:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:20:47,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:20:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:47,726 INFO L225 Difference]: With dead ends: 1084 [2021-10-24 11:20:47,726 INFO L226 Difference]: Without dead ends: 1010 [2021-10-24 11:20:47,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-24 11:20:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-10-24 11:20:47,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 594. [2021-10-24 11:20:47,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.688026981450253) internal successors, (2187), 593 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:47,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 2187 transitions. [2021-10-24 11:20:47,752 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 2187 transitions. Word has length 28 [2021-10-24 11:20:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:47,753 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 2187 transitions. [2021-10-24 11:20:47,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 2187 transitions. [2021-10-24 11:20:47,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:20:47,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:47,757 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:47,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-24 11:20:47,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:47,974 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:47,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1598494755, now seen corresponding path program 9 times [2021-10-24 11:20:47,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:47,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183017206] [2021-10-24 11:20:47,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:20:47,975 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:47,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:47,976 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:47,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-24 11:20:48,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:20:48,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:20:48,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:20:48,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:48,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:48,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:48,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183017206] [2021-10-24 11:20:48,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183017206] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:48,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:48,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:20:48,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239503464] [2021-10-24 11:20:48,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:20:48,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:48,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:20:48,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:20:48,704 INFO L87 Difference]: Start difference. First operand 594 states and 2187 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:50,580 INFO L93 Difference]: Finished difference Result 844 states and 3127 transitions. [2021-10-24 11:20:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 11:20:50,581 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:20:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:50,591 INFO L225 Difference]: With dead ends: 844 [2021-10-24 11:20:50,591 INFO L226 Difference]: Without dead ends: 826 [2021-10-24 11:20:50,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-10-24 11:20:50,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-10-24 11:20:50,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 594. [2021-10-24 11:20:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.6913996627318717) internal successors, (2189), 593 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) [2021-10-24 11:20:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 2189 transitions. [2021-10-24 11:20:50,624 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 2189 transitions. Word has length 28 [2021-10-24 11:20:50,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:50,625 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 2189 transitions. [2021-10-24 11:20:50,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 2189 transitions. [2021-10-24 11:20:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:20:50,628 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:50,629 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:50,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:50,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:50,843 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:50,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:50,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1211383215, now seen corresponding path program 10 times [2021-10-24 11:20:50,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:50,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877822634] [2021-10-24 11:20:50,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 11:20:50,844 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:50,845 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:50,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-24 11:20:51,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 11:20:51,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:20:51,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:20:51,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:51,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:51,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:51,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877822634] [2021-10-24 11:20:51,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877822634] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:51,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:51,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:20:51,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516185754] [2021-10-24 11:20:51,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:20:51,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:51,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:20:51,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:20:51,583 INFO L87 Difference]: Start difference. First operand 594 states and 2189 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:53,803 INFO L93 Difference]: Finished difference Result 1302 states and 4861 transitions. [2021-10-24 11:20:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-24 11:20:53,804 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:20:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:53,814 INFO L225 Difference]: With dead ends: 1302 [2021-10-24 11:20:53,814 INFO L226 Difference]: Without dead ends: 1278 [2021-10-24 11:20:53,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-10-24 11:20:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-10-24 11:20:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 660. [2021-10-24 11:20:53,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 3.748103186646434) internal successors, (2470), 659 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2470 transitions. [2021-10-24 11:20:53,850 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2470 transitions. Word has length 28 [2021-10-24 11:20:53,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:53,850 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2470 transitions. [2021-10-24 11:20:53,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:53,851 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2470 transitions. [2021-10-24 11:20:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 11:20:53,853 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:53,853 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:53,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:54,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:54,072 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:54,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:54,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1211902025, now seen corresponding path program 11 times [2021-10-24 11:20:54,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:54,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680360333] [2021-10-24 11:20:54,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 11:20:54,073 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:54,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:54,074 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:54,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-24 11:20:54,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:20:54,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:20:54,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:20:54,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:54,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:54,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:54,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680360333] [2021-10-24 11:20:54,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680360333] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:20:54,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:20:54,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:20:54,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717243799] [2021-10-24 11:20:54,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:20:54,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:54,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:20:54,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:20:54,956 INFO L87 Difference]: Start difference. First operand 660 states and 2470 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:20:55,783 INFO L93 Difference]: Finished difference Result 872 states and 3116 transitions. [2021-10-24 11:20:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 11:20:55,784 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-24 11:20:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:20:55,790 INFO L225 Difference]: With dead ends: 872 [2021-10-24 11:20:55,790 INFO L226 Difference]: Without dead ends: 872 [2021-10-24 11:20:55,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-10-24 11:20:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-10-24 11:20:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 608. [2021-10-24 11:20:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.7215815485996706) internal successors, (2259), 607 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2259 transitions. [2021-10-24 11:20:55,816 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2259 transitions. Word has length 28 [2021-10-24 11:20:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:20:55,817 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 2259 transitions. [2021-10-24 11:20:55,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:20:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2259 transitions. [2021-10-24 11:20:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:20:55,819 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:20:55,820 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:20:55,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-24 11:20:56,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:20:56,035 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:20:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:20:56,035 INFO L82 PathProgramCache]: Analyzing trace with hash -646076680, now seen corresponding path program 1 times [2021-10-24 11:20:56,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:20:56,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908423453] [2021-10-24 11:20:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:20:56,036 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:20:56,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:20:56,036 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:20:56,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-24 11:20:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:20:56,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:20:56,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 11:20:56,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 11:20:57,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:20:57,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908423453] [2021-10-24 11:20:57,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908423453] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:20:57,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1937854195] [2021-10-24 11:20:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:20:57,136 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:20:57,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:20:57,147 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:20:57,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-24 11:20:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:20:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 11:20:57,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:57,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:20:58,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1937854195] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:20:58,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446054429] [2021-10-24 11:20:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:20:58,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:20:58,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:20:58,175 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:20:58,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-24 11:20:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:20:58,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 11:20:58,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:20:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 11:20:58,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:20:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 11:20:58,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446054429] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:20:58,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 11:20:58,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 5, 5, 5] total 24 [2021-10-24 11:20:58,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664037370] [2021-10-24 11:20:58,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-24 11:20:58,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:20:58,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-24 11:20:58,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-10-24 11:20:58,978 INFO L87 Difference]: Start difference. First operand 608 states and 2259 transitions. Second operand has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:21:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:21:05,248 INFO L93 Difference]: Finished difference Result 1558 states and 5965 transitions. [2021-10-24 11:21:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-24 11:21:05,249 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 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 29 [2021-10-24 11:21:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:21:05,258 INFO L225 Difference]: With dead ends: 1558 [2021-10-24 11:21:05,258 INFO L226 Difference]: Without dead ends: 1505 [2021-10-24 11:21:05,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2031.6ms TimeCoverageRelationStatistics Valid=501, Invalid=1949, Unknown=0, NotChecked=0, Total=2450 [2021-10-24 11:21:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-10-24 11:21:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 865. [2021-10-24 11:21:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.892361111111111) internal successors, (3363), 864 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:21:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 3363 transitions. [2021-10-24 11:21:05,312 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 3363 transitions. Word has length 29 [2021-10-24 11:21:05,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:21:05,312 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 3363 transitions. [2021-10-24 11:21:05,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:21:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 3363 transitions. [2021-10-24 11:21:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-24 11:21:05,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:21:05,316 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:21:05,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-24 11:21:05,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-24 11:21:05,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-10-24 11:21:05,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 11:21:05,931 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:21:05,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:21:05,931 INFO L82 PathProgramCache]: Analyzing trace with hash -40713427, now seen corresponding path program 2 times [2021-10-24 11:21:05,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:21:05,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423510227] [2021-10-24 11:21:05,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:21:05,932 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:21:05,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:21:05,933 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:21:05,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-24 11:21:06,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:21:06,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:21:06,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 11:21:06,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:21:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:21:06,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:21:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-24 11:21:07,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:21:07,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423510227] [2021-10-24 11:21:07,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423510227] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:21:07,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 11:21:07,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-10-24 11:21:07,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853493815] [2021-10-24 11:21:07,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 11:21:07,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:21:07,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 11:21:07,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-24 11:21:07,093 INFO L87 Difference]: Start difference. First operand 865 states and 3363 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:21:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:21:07,985 INFO L93 Difference]: Finished difference Result 1131 states and 4426 transitions. [2021-10-24 11:21:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:21:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-24 11:21:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:21:07,991 INFO L225 Difference]: With dead ends: 1131 [2021-10-24 11:21:07,991 INFO L226 Difference]: Without dead ends: 1131 [2021-10-24 11:21:07,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-10-24 11:21:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-10-24 11:21:08,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 843. [2021-10-24 11:21:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.8717339667458432) internal successors, (3260), 842 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:21:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 3260 transitions. [2021-10-24 11:21:08,043 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 3260 transitions. Word has length 32 [2021-10-24 11:21:08,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:21:08,043 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 3260 transitions. [2021-10-24 11:21:08,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:21:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 3260 transitions. [2021-10-24 11:21:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-24 11:21:08,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:21:08,048 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:21:08,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-24 11:21:08,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:21:08,259 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:21:08,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:21:08,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1694449795, now seen corresponding path program 3 times [2021-10-24 11:21:08,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:21:08,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681484392] [2021-10-24 11:21:08,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:21:08,260 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:21:08,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:21:08,261 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:21:08,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-24 11:21:08,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:21:08,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:21:08,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:21:08,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:21:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:21:09,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:21:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:21:09,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:21:09,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681484392] [2021-10-24 11:21:09,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681484392] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:21:09,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1215825907] [2021-10-24 11:21:09,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:21:09,409 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:21:09,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:21:09,410 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:21:09,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-24 11:21:10,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:21:10,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:21:10,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 11:21:10,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:21:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 11:21:10,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:21:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 11:21:10,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1215825907] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:21:10,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376977321] [2021-10-24 11:21:10,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:21:10,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:21:10,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:21:10,984 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:21:10,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-24 11:21:11,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:21:11,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:21:11,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 11:21:11,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:21:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:21:11,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:21:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:21:11,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376977321] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:21:11,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 11:21:11,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 20 [2021-10-24 11:21:11,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071241709] [2021-10-24 11:21:11,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-24 11:21:11,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:21:11,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-24 11:21:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-10-24 11:21:11,944 INFO L87 Difference]: Start difference. First operand 843 states and 3260 transitions. Second operand has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:21:16,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:21:16,054 INFO L93 Difference]: Finished difference Result 2521 states and 9367 transitions. [2021-10-24 11:21:16,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-24 11:21:16,056 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-24 11:21:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:21:16,070 INFO L225 Difference]: With dead ends: 2521 [2021-10-24 11:21:16,070 INFO L226 Difference]: Without dead ends: 2473 [2021-10-24 11:21:16,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1344.8ms TimeCoverageRelationStatistics Valid=564, Invalid=1598, Unknown=0, NotChecked=0, Total=2162 [2021-10-24 11:21:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-10-24 11:21:16,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1125. [2021-10-24 11:21:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 3.758896797153025) internal successors, (4225), 1124 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:21:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 4225 transitions. [2021-10-24 11:21:16,149 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 4225 transitions. Word has length 32 [2021-10-24 11:21:16,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:21:16,150 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 4225 transitions. [2021-10-24 11:21:16,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:21:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 4225 transitions. [2021-10-24 11:21:16,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-24 11:21:16,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:21:16,155 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:21:16,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-24 11:21:16,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-24 11:21:16,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-24 11:21:16,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:21:16,781 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:21:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:21:16,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1311615948, now seen corresponding path program 1 times [2021-10-24 11:21:16,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:21:16,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828508298] [2021-10-24 11:21:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:21:16,782 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:21:16,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:21:16,783 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:21:16,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-24 11:21:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:21:17,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:21:17,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:21:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:21:17,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:21:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:21:17,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:21:18,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828508298] [2021-10-24 11:21:18,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828508298] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:21:18,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [264187435] [2021-10-24 11:21:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:21:18,000 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:21:18,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:21:18,001 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:21:18,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-24 11:21:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:21:18,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:21:18,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:21:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 11:21:19,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:21:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 11:21:19,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [264187435] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:21:19,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813817786] [2021-10-24 11:21:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:21:19,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:21:19,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:21:19,504 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:21:19,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-24 11:21:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:21:20,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 11:21:20,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:21:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:21:20,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:21:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:21:20,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813817786] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:21:20,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 11:21:20,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 20 [2021-10-24 11:21:20,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491642481] [2021-10-24 11:21:20,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-24 11:21:20,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:21:20,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-24 11:21:20,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-24 11:21:20,500 INFO L87 Difference]: Start difference. First operand 1125 states and 4225 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:21:24,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:21:24,024 INFO L93 Difference]: Finished difference Result 1925 states and 7163 transitions. [2021-10-24 11:21:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-24 11:21:24,026 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-24 11:21:24,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:21:24,036 INFO L225 Difference]: With dead ends: 1925 [2021-10-24 11:21:24,036 INFO L226 Difference]: Without dead ends: 1925 [2021-10-24 11:21:24,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1231.6ms TimeCoverageRelationStatistics Valid=505, Invalid=1565, Unknown=0, NotChecked=0, Total=2070 [2021-10-24 11:21:24,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-10-24 11:21:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 803. [2021-10-24 11:21:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.7231920199501247) internal successors, (2986), 802 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:21:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2986 transitions. [2021-10-24 11:21:24,095 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2986 transitions. Word has length 32 [2021-10-24 11:21:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:21:24,096 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 2986 transitions. [2021-10-24 11:21:24,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:21:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2986 transitions. [2021-10-24 11:21:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-24 11:21:24,100 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:21:24,100 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:21:24,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-10-24 11:21:24,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-24 11:21:24,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-24 11:21:24,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:21:24,706 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:21:24,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:21:24,706 INFO L82 PathProgramCache]: Analyzing trace with hash -247193430, now seen corresponding path program 1 times [2021-10-24 11:21:24,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:21:24,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238508852] [2021-10-24 11:21:24,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:21:24,707 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:21:24,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:21:24,708 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:21:24,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-24 11:21:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 11:21:25,976 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 11:21:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 11:21:26,786 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-24 11:21:26,786 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 11:21:26,787 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:21:26,789 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-24 11:21:26,790 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-24 11:21:26,790 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-24 11:21:26,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-24 11:21:27,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:21:27,018 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-24 11:21:27,018 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:21:27,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:21:27 BasicIcfg [2021-10-24 11:21:27,140 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:21:27,141 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:21:27,141 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:21:27,141 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:21:27,146 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:19:21" (3/4) ... [2021-10-24 11:21:27,148 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 11:21:27,277 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382c3d65-bf0b-43a8-b608-b02f248c0476/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 11:21:27,280 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:21:27,281 INFO L168 Benchmark]: Toolchain (without parser) took 128236.90 ms. Allocated memory was 52.4 MB in the beginning and 134.2 MB in the end (delta: 81.8 MB). Free memory was 29.3 MB in the beginning and 56.3 MB in the end (delta: -27.0 MB). Peak memory consumption was 83.5 MB. Max. memory is 16.1 GB. [2021-10-24 11:21:27,283 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 52.4 MB. Free memory was 33.0 MB in the beginning and 33.0 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:21:27,283 INFO L168 Benchmark]: CACSL2BoogieTranslator took 613.76 ms. Allocated memory is still 52.4 MB. Free memory was 29.1 MB in the beginning and 28.7 MB in the end (delta: 403.5 kB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:21:27,283 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.30 ms. Allocated memory is still 52.4 MB. Free memory was 28.7 MB in the beginning and 26.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:21:27,284 INFO L168 Benchmark]: Boogie Preprocessor took 64.10 ms. Allocated memory is still 52.4 MB. Free memory was 26.5 MB in the beginning and 24.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:21:27,285 INFO L168 Benchmark]: RCFGBuilder took 1620.63 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 24.2 MB in the beginning and 40.4 MB in the end (delta: -16.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:21:27,285 INFO L168 Benchmark]: TraceAbstraction took 125682.87 ms. Allocated memory was 69.2 MB in the beginning and 134.2 MB in the end (delta: 65.0 MB). Free memory was 39.8 MB in the beginning and 41.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 62.9 MB. Max. memory is 16.1 GB. [2021-10-24 11:21:27,286 INFO L168 Benchmark]: Witness Printer took 139.60 ms. Allocated memory is still 134.2 MB. Free memory was 41.1 MB in the beginning and 56.3 MB in the end (delta: -15.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2021-10-24 11:21:27,288 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 52.4 MB. Free memory was 33.0 MB in the beginning and 33.0 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 613.76 ms. Allocated memory is still 52.4 MB. Free memory was 29.1 MB in the beginning and 28.7 MB in the end (delta: 403.5 kB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 94.30 ms. Allocated memory is still 52.4 MB. Free memory was 28.7 MB in the beginning and 26.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.10 ms. Allocated memory is still 52.4 MB. Free memory was 26.5 MB in the beginning and 24.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1620.63 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 24.2 MB in the beginning and 40.4 MB in the end (delta: -16.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 125682.87 ms. Allocated memory was 69.2 MB in the beginning and 134.2 MB in the end (delta: 65.0 MB). Free memory was 39.8 MB in the beginning and 41.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 62.9 MB. Max. memory is 16.1 GB. * Witness Printer took 139.60 ms. Allocated memory is still 134.2 MB. Free memory was 41.1 MB in the beginning and 56.3 MB in the end (delta: -15.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 54778.2ms, 241 PlacesBefore, 42 PlacesAfterwards, 257 TransitionsBefore, 41 TransitionsAfterwards, 3162 CoEnabledTransitionPairs, 8 FixpointIterations, 163 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 36 TrivialYvCompositions, 16 ConcurrentYvCompositions, 17 ChoiceCompositions, 271 TotalNumberOfCompositions, 5729 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3832, positive: 3662, positive conditional: 0, positive unconditional: 3662, negative: 170, negative conditional: 0, negative unconditional: 170, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2199, positive: 2146, positive conditional: 0, positive unconditional: 2146, negative: 53, negative conditional: 0, negative unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2199, positive: 2146, positive conditional: 0, positive unconditional: 2146, negative: 53, negative conditional: 0, negative unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 53, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 53, negative conditional: 0, negative unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 9352, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 9352, negative conditional: 0, negative unconditional: 9352, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3832, positive: 1516, positive conditional: 0, positive unconditional: 1516, negative: 117, negative conditional: 0, negative unconditional: 117, unknown: 2199, unknown conditional: 0, unknown unconditional: 2199] , Statistics on independence cache: Total cache size (in pairs): 218, Positive cache size: 200, Positive conditional cache size: 0, Positive unconditional cache size: 200, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 109]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int *A, *B, *C; [L42] 0 int maxa, maxb, maxc, N, p; [L86] 0 pthread_t t1, t2, t3; [L88] 0 N = __VERIFIER_nondet_int() [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L118] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L119] 0 int i = 0; VAL [A={0:0}, B={0:0}, C={0:0}, maxa=0, maxb=0, maxc=0, N=2, p=0] [L119] COND TRUE 0 i < size [L120] 0 arr[i] = __VERIFIER_nondet_int() [L119] 0 i++ VAL [A={0:0}, B={0:0}, C={0:0}, maxa=0, maxb=0, maxc=0, N=2, p=0] [L119] COND TRUE 0 i < size [L120] 0 arr[i] = __VERIFIER_nondet_int() [L119] 0 i++ VAL [A={0:0}, B={0:0}, C={0:0}, maxa=0, maxb=0, maxc=0, N=2, p=0] [L119] COND FALSE 0 !(i < size) [L122] 0 return arr; [L90] 0 A = create_fresh_int_array(N) [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L118] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L119] 0 int i = 0; VAL [A={1:0}, B={0:0}, C={0:0}, maxa=0, maxb=0, maxc=0, N=2, p=0] [L119] COND TRUE 0 i < size [L120] 0 arr[i] = __VERIFIER_nondet_int() [L119] 0 i++ VAL [A={1:0}, B={0:0}, C={0:0}, maxa=0, maxb=0, maxc=0, N=2, p=0] [L119] COND TRUE 0 i < size [L120] 0 arr[i] = __VERIFIER_nondet_int() [L119] 0 i++ VAL [A={1:0}, B={0:0}, C={0:0}, maxa=0, maxb=0, maxc=0, N=2, p=0] [L119] COND FALSE 0 !(i < size) [L122] 0 return arr; [L91] 0 B = create_fresh_int_array(N) [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L118] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L119] 0 int i = 0; VAL [A={1:0}, B={2:0}, C={0:0}, maxa=0, maxb=0, maxc=0, N=2, p=0] [L119] COND TRUE 0 i < size [L120] 0 arr[i] = __VERIFIER_nondet_int() [L119] 0 i++ VAL [A={1:0}, B={2:0}, C={0:0}, maxa=0, maxb=0, maxc=0, N=2, p=0] [L119] COND TRUE 0 i < size [L120] 0 arr[i] = __VERIFIER_nondet_int() [L119] 0 i++ VAL [A={1:0}, B={2:0}, C={0:0}, maxa=0, maxb=0, maxc=0, N=2, p=0] [L119] COND FALSE 0 !(i < size) [L122] 0 return arr; [L92] 0 C = create_fresh_int_array(N) [L94] 0 p = 1 [L96] EXPR 0 A[0] [L96] 0 maxa = A[0] [L97] EXPR 0 B[0] [L97] 0 maxb = B[0] [L98] EXPR 0 A[0] [L98] EXPR 0 B[0] [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L128] 0 return a + b; [L98] 0 maxc = plus(A[0], B[0]) [L101] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={1:0}, B={2:0}, C={3:0}, maxa=2147483636, maxb=7, maxc=2147483643, N=2, p=1] [L48] 1 int i=1; VAL [A={1:0}, B={2:0}, C={3:0}, i=1, maxa=2147483636, maxb=7, maxc=2147483643, N=2, p=1] [L102] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={1:0}, B={2:0}, C={3:0}, i=1, maxa=2147483636, maxb=7, maxc=2147483643, N=2, p=1] [L61] 2 int i=1; VAL [A={1:0}, B={2:0}, C={3:0}, i=1, maxa=2147483636, maxb=7, maxc=2147483643, N=2, p=1] [L61] COND TRUE 2 i