./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.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_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/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_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/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_a44b80f0-4989-419b-9080-5ee069ff5bd0/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 3bb6c0c2761d68d3e7829c0f32b36ba3f79fc3535397f5ce17ba3f06b51bfa06 ............................................................................................................................................ 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_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/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_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/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_a44b80f0-4989-419b-9080-5ee069ff5bd0/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 3bb6c0c2761d68d3e7829c0f32b36ba3f79fc3535397f5ce17ba3f06b51bfa06 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:19:13,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:19:13,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:19:13,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:19:13,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:19:13,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:19:13,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:19:13,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:19:13,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:19:13,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:19:13,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:19:13,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:19:13,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:19:13,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:19:13,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:19:13,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:19:13,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:19:13,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:19:13,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:19:13,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:19:13,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:19:13,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:19:13,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:19:13,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:19:13,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:19:13,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:19:13,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:19:13,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:19:13,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:19:13,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:19:13,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:19:13,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:19:13,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:19:13,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:19:13,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:19:13,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:19:13,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:19:13,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:19:13,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:19:13,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:19:13,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:19:13,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:19:13,681 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:19:13,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:19:13,683 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:19:13,683 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:19:13,684 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:19:13,684 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:19:13,684 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:19:13,692 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:19:13,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:19:13,692 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:19:13,694 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:19:13,694 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:19:13,695 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:19:13,695 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:19:13,695 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:19:13,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:19:13,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:19:13,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:19:13,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:19:13,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:19:13,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:19:13,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:19:13,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:19:13,698 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:19:13,699 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:19:13,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:19:13,699 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:19:13,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:19:13,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:19:13,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:19:13,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:19:13,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:19:13,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:19:13,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:19:13,704 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:19:13,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:19:13,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:19:13,704 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:19:13,705 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:19:13,705 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_a44b80f0-4989-419b-9080-5ee069ff5bd0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bb6c0c2761d68d3e7829c0f32b36ba3f79fc3535397f5ce17ba3f06b51bfa06 [2021-10-24 10:19:14,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:19:14,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:19:14,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:19:14,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:19:14,130 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:19:14,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2021-10-24 10:19:14,221 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/data/e43e8786d/b352578581fc4e128444945aae028887/FLAG7eb6521c3 [2021-10-24 10:19:14,944 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:19:14,945 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2021-10-24 10:19:14,962 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/data/e43e8786d/b352578581fc4e128444945aae028887/FLAG7eb6521c3 [2021-10-24 10:19:14,984 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/data/e43e8786d/b352578581fc4e128444945aae028887 [2021-10-24 10:19:14,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:19:14,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:19:14,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:19:14,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:19:15,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:19:15,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:19:14" (1/1) ... [2021-10-24 10:19:15,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1ec5cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:15, skipping insertion in model container [2021-10-24 10:19:15,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:19:14" (1/1) ... [2021-10-24 10:19:15,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:19:15,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:19:15,347 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_a44b80f0-4989-419b-9080-5ee069ff5bd0/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[3687,3700] [2021-10-24 10:19:15,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:19:15,373 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 10:19:15,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c0f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:15, skipping insertion in model container [2021-10-24 10:19:15,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:19:15,375 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-24 10:19:15,378 INFO L168 Benchmark]: Toolchain (without parser) took 385.19 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 72.6 MB in the beginning and 100.9 MB in the end (delta: -28.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:19:15,379 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 104.9 MB. Free memory is still 60.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:19:15,380 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.81 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 72.6 MB in the beginning and 100.9 MB in the end (delta: -28.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:19:15,383 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 104.9 MB. Free memory is still 60.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 378.81 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 72.6 MB in the beginning and 100.9 MB in the end (delta: -28.2 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: 140]: 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 10:19:18,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:19:18,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:19:18,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:19:18,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:19:18,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:19:18,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:19:18,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:19:18,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:19:18,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:19:18,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:19:18,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:19:18,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:19:18,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:19:18,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:19:18,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:19:18,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:19:18,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:19:18,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:19:18,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:19:18,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:19:18,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:19:18,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:19:18,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:19:18,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:19:18,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:19:18,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:19:18,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:19:18,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:19:18,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:19:18,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:19:18,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:19:18,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:19:18,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:19:18,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:19:18,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:19:18,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:19:18,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:19:18,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:19:18,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:19:18,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:19:18,437 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 10:19:18,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:19:18,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:19:18,491 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:19:18,491 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:19:18,492 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:19:18,492 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:19:18,492 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:19:18,492 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:19:18,493 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:19:18,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:19:18,496 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:19:18,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:19:18,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:19:18,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:19:18,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:19:18,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:19:18,497 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:19:18,498 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 10:19:18,498 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 10:19:18,498 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:19:18,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:19:18,499 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:19:18,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:19:18,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:19:18,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 10:19:18,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:19:18,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:19:18,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:19:18,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:19:18,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:19:18,501 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 10:19:18,501 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 10:19:18,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:19:18,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:19:18,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:19:18,503 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_a44b80f0-4989-419b-9080-5ee069ff5bd0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bb6c0c2761d68d3e7829c0f32b36ba3f79fc3535397f5ce17ba3f06b51bfa06 [2021-10-24 10:19:18,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:19:19,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:19:19,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:19:19,024 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:19:19,025 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:19:19,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2021-10-24 10:19:19,125 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/data/657bdbbb6/8070e41a23384fbd8eebf49cb1207a93/FLAGb864db3cb [2021-10-24 10:19:19,725 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:19:19,726 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2021-10-24 10:19:19,742 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/data/657bdbbb6/8070e41a23384fbd8eebf49cb1207a93/FLAGb864db3cb [2021-10-24 10:19:20,028 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/data/657bdbbb6/8070e41a23384fbd8eebf49cb1207a93 [2021-10-24 10:19:20,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:19:20,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:19:20,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:19:20,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:19:20,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:19:20,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:19:20" (1/1) ... [2021-10-24 10:19:20,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b219158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:20, skipping insertion in model container [2021-10-24 10:19:20,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:19:20" (1/1) ... [2021-10-24 10:19:20,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:19:20,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:19:20,306 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_a44b80f0-4989-419b-9080-5ee069ff5bd0/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[3687,3700] [2021-10-24 10:19:20,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:19:20,337 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-24 10:19:20,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:19:20,411 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_a44b80f0-4989-419b-9080-5ee069ff5bd0/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[3687,3700] [2021-10-24 10:19:20,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:19:20,437 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:19:20,473 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_a44b80f0-4989-419b-9080-5ee069ff5bd0/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[3687,3700] [2021-10-24 10:19:20,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:19:20,509 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:19:20,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:20 WrapperNode [2021-10-24 10:19:20,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:19:20,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:19:20,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:19:20,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:19:20,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:20" (1/1) ... [2021-10-24 10:19:20,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:20" (1/1) ... [2021-10-24 10:19:20,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:19:20,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:19:20,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:19:20,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:19:20,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:20" (1/1) ... [2021-10-24 10:19:20,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:20" (1/1) ... [2021-10-24 10:19:20,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:20" (1/1) ... [2021-10-24 10:19:20,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:20" (1/1) ... [2021-10-24 10:19:20,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:20" (1/1) ... [2021-10-24 10:19:20,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:20" (1/1) ... [2021-10-24 10:19:20,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:20" (1/1) ... [2021-10-24 10:19:20,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:19:20,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:19:20,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:19:20,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:19:20,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:20" (1/1) ... [2021-10-24 10:19:20,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:19:20,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:19:20,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:19:20,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:19:20,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 10:19:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:19:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 10:19:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-24 10:19:20,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-24 10:19:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-24 10:19:20,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-24 10:19:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-24 10:19:20,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-24 10:19:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-24 10:19:20,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-24 10:19:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-24 10:19:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-24 10:19:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 10:19:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:19:20,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:19:20,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 10:19:20,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 10:19:20,731 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 10:19:22,959 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:19:22,959 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2021-10-24 10:19:22,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:19:22 BoogieIcfgContainer [2021-10-24 10:19:22,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:19:22,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:19:22,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:19:22,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:19:22,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:19:20" (1/3) ... [2021-10-24 10:19:22,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79db2ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:19:22, skipping insertion in model container [2021-10-24 10:19:22,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:20" (2/3) ... [2021-10-24 10:19:22,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79db2ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:19:22, skipping insertion in model container [2021-10-24 10:19:22,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:19:22" (3/3) ... [2021-10-24 10:19:22,971 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2021-10-24 10:19:22,977 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-24 10:19:22,977 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:19:22,978 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:19:22,978 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-24 10:19:23,019 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,020 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,020 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,020 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,020 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,021 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,021 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,021 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,021 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,022 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,022 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,022 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,022 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,023 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,023 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,023 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,024 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,024 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,024 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,024 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,025 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,025 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,025 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,025 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,026 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,026 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,026 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,026 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,027 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,027 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,027 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,027 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,028 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,028 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,029 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,029 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,029 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,029 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,030 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,030 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,030 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,030 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,030 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,031 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,031 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,031 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,031 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,031 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,032 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,032 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,032 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,033 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,033 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,033 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,033 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,034 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,034 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,034 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,035 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,035 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,035 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,036 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,036 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,036 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,036 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,037 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,037 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,037 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,037 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,037 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,038 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,038 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,038 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,039 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,039 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,039 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,039 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,040 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,040 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,040 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,040 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,040 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,044 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,045 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,045 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,045 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,045 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,046 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,046 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,046 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,046 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,047 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,047 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,047 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,050 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,050 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,051 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,051 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,051 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,051 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,052 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,052 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,054 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,054 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,055 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,055 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,055 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,055 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,056 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,056 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,056 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,056 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,057 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,057 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,059 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,060 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,060 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,060 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,060 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,061 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,061 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,061 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,061 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 10:19:23,071 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-24 10:19:23,119 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:19:23,129 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 10:19:23,130 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-24 10:19:23,148 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-24 10:19:23,162 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 225 transitions, 482 flow [2021-10-24 10:19:23,179 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 225 transitions, 482 flow [2021-10-24 10:19:23,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 216 places, 225 transitions, 482 flow [2021-10-24 10:19:23,272 INFO L129 PetriNetUnfolder]: 22/221 cut-off events. [2021-10-24 10:19:23,273 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-24 10:19:23,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 221 events. 22/221 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 106 event pairs, 0 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 187. Up to 2 conditions per place. [2021-10-24 10:19:23,284 INFO L116 LiptonReduction]: Number of co-enabled transitions 1376 [2021-10-24 10:19:54,015 INFO L131 LiptonReduction]: Checked pairs total: 3508 [2021-10-24 10:19:54,016 INFO L133 LiptonReduction]: Total number of compositions: 224 [2021-10-24 10:19:54,025 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 40 transitions, 112 flow [2021-10-24 10:19:54,073 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 325 states, 324 states have (on average 4.021604938271605) internal successors, (1303), 324 states have internal predecessors, (1303), 0 states have call successors, (0), 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 10:19:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 325 states, 324 states have (on average 4.021604938271605) internal successors, (1303), 324 states have internal predecessors, (1303), 0 states have call successors, (0), 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 10:19:54,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-24 10:19:54,101 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:54,102 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] [2021-10-24 10:19:54,103 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-24 10:19:54,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:54,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1769164313, now seen corresponding path program 1 times [2021-10-24 10:19:54,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:19:54,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344381185] [2021-10-24 10:19:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:54,127 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:19:54,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:19:54,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:19:54,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 10:19:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:54,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:19:54,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:19:54,530 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 10:19:54,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:19:54,746 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 10:19:54,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:19:54,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344381185] [2021-10-24 10:19:54,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344381185] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:19:54,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:19:54,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-24 10:19:54,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448561527] [2021-10-24 10:19:54,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:19:54,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:19:54,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:19:54,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:19:54,823 INFO L87 Difference]: Start difference. First operand has 325 states, 324 states have (on average 4.021604938271605) internal successors, (1303), 324 states have internal predecessors, (1303), 0 states have call successors, (0), 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 3 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 10:19:55,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:19:55,021 INFO L93 Difference]: Finished difference Result 620 states and 2531 transitions. [2021-10-24 10:19:55,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:19:55,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-24 10:19:55,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:19:55,065 INFO L225 Difference]: With dead ends: 620 [2021-10-24 10:19:55,066 INFO L226 Difference]: Without dead ends: 591 [2021-10-24 10:19:55,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:19:55,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-10-24 10:19:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 441. [2021-10-24 10:19:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 4.054545454545455) internal successors, (1784), 440 states have internal predecessors, (1784), 0 states have call successors, (0), 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 10:19:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1784 transitions. [2021-10-24 10:19:55,253 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1784 transitions. Word has length 24 [2021-10-24 10:19:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:19:55,255 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1784 transitions. [2021-10-24 10:19:55,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 10:19:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1784 transitions. [2021-10-24 10:19:55,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-24 10:19:55,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:55,270 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] [2021-10-24 10:19:55,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:19:55,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:19:55,471 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-24 10:19:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:55,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2130306405, now seen corresponding path program 1 times [2021-10-24 10:19:55,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:19:55,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29894117] [2021-10-24 10:19:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:55,473 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:19:55,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:19:55,475 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:19:55,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 10:19:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:55,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:19:55,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:19:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:55,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:19:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:56,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:19:56,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29894117] [2021-10-24 10:19:56,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29894117] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:19:56,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1218204705] [2021-10-24 10:19:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:56,034 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:19:56,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:19:56,039 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:19:56,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-24 10:19:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:56,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:19:56,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:19:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:56,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:19:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:56,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1218204705] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:19:56,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-24 10:19:56,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3, 3] total 7 [2021-10-24 10:19:56,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120492761] [2021-10-24 10:19:56,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:19:56,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:19:56,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:19:56,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:19:56,618 INFO L87 Difference]: Start difference. First operand 441 states and 1784 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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 10:19:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:19:56,833 INFO L93 Difference]: Finished difference Result 747 states and 2835 transitions. [2021-10-24 10:19:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:19:56,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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 26 [2021-10-24 10:19:56,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:19:56,846 INFO L225 Difference]: With dead ends: 747 [2021-10-24 10:19:56,846 INFO L226 Difference]: Without dead ends: 655 [2021-10-24 10:19:56,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:19:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-10-24 10:19:56,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 583. [2021-10-24 10:19:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.922680412371134) internal successors, (2283), 582 states have internal predecessors, (2283), 0 states have call successors, (0), 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 10:19:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 2283 transitions. [2021-10-24 10:19:56,892 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 2283 transitions. Word has length 26 [2021-10-24 10:19:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:19:56,892 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 2283 transitions. [2021-10-24 10:19:56,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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 10:19:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 2283 transitions. [2021-10-24 10:19:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-24 10:19:56,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:56,897 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] [2021-10-24 10:19:56,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:19:57,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:19:57,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:19:57,312 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-24 10:19:57,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:57,313 INFO L82 PathProgramCache]: Analyzing trace with hash 518714661, now seen corresponding path program 1 times [2021-10-24 10:19:57,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:19:57,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213689023] [2021-10-24 10:19:57,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:57,314 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:19:57,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:19:57,316 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:19:57,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 10:19:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:57,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:19:57,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:19:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:57,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:19:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:58,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:19:58,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213689023] [2021-10-24 10:19:58,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213689023] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:19:58,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:19:58,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-24 10:19:58,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425296959] [2021-10-24 10:19:58,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:19:58,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:19:58,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:19:58,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:19:58,116 INFO L87 Difference]: Start difference. First operand 583 states and 2283 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 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 10:19:58,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:19:58,386 INFO L93 Difference]: Finished difference Result 1111 states and 4063 transitions. [2021-10-24 10:19:58,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:19:58,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 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 26 [2021-10-24 10:19:58,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:19:58,401 INFO L225 Difference]: With dead ends: 1111 [2021-10-24 10:19:58,401 INFO L226 Difference]: Without dead ends: 1031 [2021-10-24 10:19:58,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:19:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-10-24 10:19:58,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 821. [2021-10-24 10:19:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.9097560975609755) internal successors, (3206), 820 states have internal predecessors, (3206), 0 states have call successors, (0), 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 10:19:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 3206 transitions. [2021-10-24 10:19:58,452 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 3206 transitions. Word has length 26 [2021-10-24 10:19:58,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:19:58,453 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 3206 transitions. [2021-10-24 10:19:58,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 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 10:19:58,453 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 3206 transitions. [2021-10-24 10:19:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-24 10:19:58,458 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:58,458 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] [2021-10-24 10:19:58,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 10:19:58,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:19:58,675 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-24 10:19:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:58,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2091274025, now seen corresponding path program 1 times [2021-10-24 10:19:58,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:19:58,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190697902] [2021-10-24 10:19:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:58,679 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:19:58,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:19:58,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:19:58,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 10:19:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:58,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:19:58,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:19:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:19:59,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:19:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:19:59,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:19:59,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190697902] [2021-10-24 10:19:59,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190697902] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:19:59,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1387778401] [2021-10-24 10:19:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:59,193 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:19:59,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:19:59,196 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:19:59,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-24 10:19:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:59,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 10:19:59,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:19:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:59,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:20:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:20:00,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1387778401] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:20:00,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575049523] [2021-10-24 10:20:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:20:00,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:20:00,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:20:00,449 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:20:00,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-24 10:20:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:20:00,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 10:20:00,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:20:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:20:01,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:20:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:20:01,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575049523] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:20:01,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:20:01,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5, 6, 5, 4] total 15 [2021-10-24 10:20:01,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516046833] [2021-10-24 10:20:01,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-24 10:20:01,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:20:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-24 10:20:01,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:20:01,512 INFO L87 Difference]: Start difference. First operand 821 states and 3206 transitions. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 10:20:02,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:20:02,373 INFO L93 Difference]: Finished difference Result 1727 states and 6270 transitions. [2021-10-24 10:20:02,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 10:20:02,374 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 27 [2021-10-24 10:20:02,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:20:02,395 INFO L225 Difference]: With dead ends: 1727 [2021-10-24 10:20:02,395 INFO L226 Difference]: Without dead ends: 1601 [2021-10-24 10:20:02,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 400.6ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-10-24 10:20:02,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-10-24 10:20:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 971. [2021-10-24 10:20:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 4.027835051546392) internal successors, (3907), 970 states have internal predecessors, (3907), 0 states have call successors, (0), 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 10:20:02,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 3907 transitions. [2021-10-24 10:20:02,467 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 3907 transitions. Word has length 27 [2021-10-24 10:20:02,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:20:02,468 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 3907 transitions. [2021-10-24 10:20:02,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 10:20:02,469 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 3907 transitions. [2021-10-24 10:20:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 10:20:02,474 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:20:02,474 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 10:20:02,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-24 10:20:02,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-24 10:20:02,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 10:20:03,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:20:03,079 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-24 10:20:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:20:03,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1362831437, now seen corresponding path program 1 times [2021-10-24 10:20:03,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:20:03,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603771386] [2021-10-24 10:20:03,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:20:03,080 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:20:03,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:20:03,082 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:20:03,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-24 10:20:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:20:03,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 10:20:03,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:20:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:20:03,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:20:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:20:03,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:20:03,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603771386] [2021-10-24 10:20:03,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603771386] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:20:03,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:20:03,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-24 10:20:03,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858564959] [2021-10-24 10:20:03,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:20:03,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:20:03,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:20:03,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:20:03,726 INFO L87 Difference]: Start difference. First operand 971 states and 3907 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 10:20:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:20:03,954 INFO L93 Difference]: Finished difference Result 1308 states and 4956 transitions. [2021-10-24 10:20:03,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:20:03,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 10:20:03,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:20:03,974 INFO L225 Difference]: With dead ends: 1308 [2021-10-24 10:20:03,974 INFO L226 Difference]: Without dead ends: 1232 [2021-10-24 10:20:03,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:20:03,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-10-24 10:20:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1056. [2021-10-24 10:20:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 3.9971563981042655) internal successors, (4217), 1055 states have internal predecessors, (4217), 0 states have call successors, (0), 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 10:20:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 4217 transitions. [2021-10-24 10:20:04,049 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 4217 transitions. Word has length 28 [2021-10-24 10:20:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:20:04,049 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 4217 transitions. [2021-10-24 10:20:04,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 10:20:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 4217 transitions. [2021-10-24 10:20:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 10:20:04,061 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:20:04,061 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 10:20:04,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-24 10:20:04,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:20:04,282 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-24 10:20:04,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:20:04,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1578232275, now seen corresponding path program 1 times [2021-10-24 10:20:04,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:20:04,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963081667] [2021-10-24 10:20:04,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:20:04,284 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:20:04,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:20:04,285 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:20:04,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-24 10:20:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:20:04,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:20:04,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:20:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 10:20:04,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:20:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 10:20:05,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:20:05,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963081667] [2021-10-24 10:20:05,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963081667] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:20:05,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:20:05,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-10-24 10:20:05,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993891316] [2021-10-24 10:20:05,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:20:05,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:20:05,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:20:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:20:05,332 INFO L87 Difference]: Start difference. First operand 1056 states and 4217 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 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 10:20:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:20:05,584 INFO L93 Difference]: Finished difference Result 1764 states and 6667 transitions. [2021-10-24 10:20:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:20:05,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 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 29 [2021-10-24 10:20:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:20:05,604 INFO L225 Difference]: With dead ends: 1764 [2021-10-24 10:20:05,604 INFO L226 Difference]: Without dead ends: 1689 [2021-10-24 10:20:05,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:20:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-10-24 10:20:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1059. [2021-10-24 10:20:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 3.9905482041587903) internal successors, (4222), 1058 states have internal predecessors, (4222), 0 states have call successors, (0), 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 10:20:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 4222 transitions. [2021-10-24 10:20:05,693 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 4222 transitions. Word has length 29 [2021-10-24 10:20:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:20:05,693 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 4222 transitions. [2021-10-24 10:20:05,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 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 10:20:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 4222 transitions. [2021-10-24 10:20:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 10:20:05,698 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:20:05,698 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 10:20:05,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-24 10:20:05,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:20:05,911 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-24 10:20:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:20:05,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1539160028, now seen corresponding path program 1 times [2021-10-24 10:20:05,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:20:05,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660527637] [2021-10-24 10:20:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:20:05,913 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:20:05,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:20:05,914 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:20:05,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-24 10:20:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:20:06,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:20:06,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:20:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 10:20:06,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:20:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 10:20:06,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:20:06,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660527637] [2021-10-24 10:20:06,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660527637] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:20:06,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:20:06,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-24 10:20:06,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735599952] [2021-10-24 10:20:06,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:20:06,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:20:06,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:20:06,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:20:06,694 INFO L87 Difference]: Start difference. First operand 1059 states and 4222 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 10:20:07,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:20:07,427 INFO L93 Difference]: Finished difference Result 2003 states and 6982 transitions. [2021-10-24 10:20:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 10:20:07,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 10:20:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:20:07,451 INFO L225 Difference]: With dead ends: 2003 [2021-10-24 10:20:07,451 INFO L226 Difference]: Without dead ends: 1647 [2021-10-24 10:20:07,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:20:07,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-10-24 10:20:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 953. [2021-10-24 10:20:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.813025210084034) internal successors, (3630), 952 states have internal predecessors, (3630), 0 states have call successors, (0), 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 10:20:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3630 transitions. [2021-10-24 10:20:07,542 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3630 transitions. Word has length 29 [2021-10-24 10:20:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:20:07,543 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 3630 transitions. [2021-10-24 10:20:07,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 10:20:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3630 transitions. [2021-10-24 10:20:07,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 10:20:07,549 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:20:07,549 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 10:20:07,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-24 10:20:07,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:20:07,766 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-24 10:20:07,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:20:07,766 INFO L82 PathProgramCache]: Analyzing trace with hash 508004774, now seen corresponding path program 2 times [2021-10-24 10:20:07,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:20:07,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792566863] [2021-10-24 10:20:07,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:20:07,767 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:20:07,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:20:07,769 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:20:07,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-24 10:20:08,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:20:08,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:20:08,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:20:08,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:20:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:20:08,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:20:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:20:09,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:20:09,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792566863] [2021-10-24 10:20:09,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792566863] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:20:09,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:20:09,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-24 10:20:09,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413148657] [2021-10-24 10:20:09,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:20:09,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:20:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:20:09,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:20:09,064 INFO L87 Difference]: Start difference. First operand 953 states and 3630 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 10:20:09,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:20:09,677 INFO L93 Difference]: Finished difference Result 1145 states and 4366 transitions. [2021-10-24 10:20:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 10:20:09,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 29 [2021-10-24 10:20:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:20:09,696 INFO L225 Difference]: With dead ends: 1145 [2021-10-24 10:20:09,696 INFO L226 Difference]: Without dead ends: 1077 [2021-10-24 10:20:09,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:20:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-10-24 10:20:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 677. [2021-10-24 10:20:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.7928994082840237) internal successors, (2564), 676 states have internal predecessors, (2564), 0 states have call successors, (0), 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 10:20:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2564 transitions. [2021-10-24 10:20:09,743 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2564 transitions. Word has length 29 [2021-10-24 10:20:09,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:20:09,744 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 2564 transitions. [2021-10-24 10:20:09,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 10:20:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2564 transitions. [2021-10-24 10:20:09,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-24 10:20:09,748 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:20:09,748 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, 1] [2021-10-24 10:20:09,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-24 10:20:09,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:20:09,966 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-24 10:20:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:20:09,966 INFO L82 PathProgramCache]: Analyzing trace with hash 727179269, now seen corresponding path program 1 times [2021-10-24 10:20:09,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:20:09,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045510836] [2021-10-24 10:20:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:20:09,967 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:20:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:20:09,969 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:20:09,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-24 10:20:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:20:10,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:20:10,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:20:10,912 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 10:20:10,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:20:11,154 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 10:20:11,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:20:11,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045510836] [2021-10-24 10:20:11,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045510836] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:20:11,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1572730454] [2021-10-24 10:20:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:20:11,155 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:20:11,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:20:11,156 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:20:11,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-24 10:20:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:20:11,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 10:20:11,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:20:12,031 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 10:20:12,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:20:12,167 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 10:20:12,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1572730454] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:20:12,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217465869] [2021-10-24 10:20:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:20:12,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:20:12,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:20:12,169 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:20:12,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-24 10:20:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:20:12,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:20:12,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:20:12,889 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 10:20:12,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:20:13,129 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 10:20:13,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217465869] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:20:13,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:20:13,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 17 [2021-10-24 10:20:13,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693860250] [2021-10-24 10:20:13,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-24 10:20:13,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:20:13,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-24 10:20:13,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-10-24 10:20:13,132 INFO L87 Difference]: Start difference. First operand 677 states and 2564 transitions. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:20:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:20:14,455 INFO L93 Difference]: Finished difference Result 2663 states and 9736 transitions. [2021-10-24 10:20:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-24 10:20:14,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-24 10:20:14,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:20:14,480 INFO L225 Difference]: With dead ends: 2663 [2021-10-24 10:20:14,480 INFO L226 Difference]: Without dead ends: 2308 [2021-10-24 10:20:14,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 738.7ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-10-24 10:20:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-10-24 10:20:14,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 860. [2021-10-24 10:20:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.9871944121071015) internal successors, (3425), 859 states have internal predecessors, (3425), 0 states have call successors, (0), 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 10:20:14,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 3425 transitions. [2021-10-24 10:20:14,540 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 3425 transitions. Word has length 30 [2021-10-24 10:20:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:20:14,541 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 3425 transitions. [2021-10-24 10:20:14,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:20:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 3425 transitions. [2021-10-24 10:20:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-24 10:20:14,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:20:14,545 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, 1, 1, 1, 1] [2021-10-24 10:20:14,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-24 10:20:14,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-24 10:20:14,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-24 10:20:15,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:20:15,150 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-24 10:20:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:20:15,151 INFO L82 PathProgramCache]: Analyzing trace with hash -972997388, now seen corresponding path program 1 times [2021-10-24 10:20:15,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:20:15,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107747109] [2021-10-24 10:20:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:20:15,151 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:20:15,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:20:15,152 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:20:15,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-24 10:20:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:20:15,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:20:15,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:20:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 10:20:16,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:20:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 10:20:16,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:20:16,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107747109] [2021-10-24 10:20:16,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107747109] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:20:16,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:20:16,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-24 10:20:16,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684962756] [2021-10-24 10:20:16,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:20:16,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:20:16,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:20:16,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:20:16,883 INFO L87 Difference]: Start difference. First operand 860 states and 3425 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 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 10:20:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:20:17,345 INFO L93 Difference]: Finished difference Result 1114 states and 4511 transitions. [2021-10-24 10:20:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:20:17,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-10-24 10:20:17,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:20:17,359 INFO L225 Difference]: With dead ends: 1114 [2021-10-24 10:20:17,359 INFO L226 Difference]: Without dead ends: 1114 [2021-10-24 10:20:17,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:20:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-10-24 10:20:17,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 812. [2021-10-24 10:20:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.9889025893958077) internal successors, (3235), 811 states have internal predecessors, (3235), 0 states have call successors, (0), 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 10:20:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 3235 transitions. [2021-10-24 10:20:17,417 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 3235 transitions. Word has length 33 [2021-10-24 10:20:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:20:17,419 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 3235 transitions. [2021-10-24 10:20:17,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 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 10:20:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 3235 transitions. [2021-10-24 10:20:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-24 10:20:17,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:20:17,426 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, 1, 1, 1, 1] [2021-10-24 10:20:17,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-24 10:20:17,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:20:17,643 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-24 10:20:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:20:17,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1710378164, now seen corresponding path program 1 times [2021-10-24 10:20:17,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:20:17,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669031353] [2021-10-24 10:20:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:20:17,644 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:20:17,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:20:17,645 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:20:17,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-24 10:20:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:20:18,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 10:20:18,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:20:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 10:20:18,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:20:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 10:20:19,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:20:19,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669031353] [2021-10-24 10:20:19,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669031353] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:20:19,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1695795219] [2021-10-24 10:20:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:20:19,206 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:20:19,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:20:19,217 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:20:19,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-24 10:20:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:20:19,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 10:20:19,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:20:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 10:20:20,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:20:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 10:20:20,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1695795219] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:20:20,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323182968] [2021-10-24 10:20:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:20:20,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:20:20,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:20:20,500 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:20:20,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-24 10:20:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:20:21,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 10:20:21,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:20:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 10:20:21,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:20:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-24 10:20:21,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323182968] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:20:21,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:20:21,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-10-24 10:20:21,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518933891] [2021-10-24 10:20:21,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-24 10:20:21,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:20:21,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-24 10:20:21,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-24 10:20:21,872 INFO L87 Difference]: Start difference. First operand 812 states and 3235 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 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 10:20:22,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:20:22,281 INFO L93 Difference]: Finished difference Result 1946 states and 7937 transitions. [2021-10-24 10:20:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:20:22,283 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 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 33 [2021-10-24 10:20:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:20:22,303 INFO L225 Difference]: With dead ends: 1946 [2021-10-24 10:20:22,303 INFO L226 Difference]: Without dead ends: 1946 [2021-10-24 10:20:22,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-24 10:20:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-10-24 10:20:22,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1014. [2021-10-24 10:20:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 4.049358341559723) internal successors, (4102), 1013 states have internal predecessors, (4102), 0 states have call successors, (0), 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 10:20:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 4102 transitions. [2021-10-24 10:20:22,364 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 4102 transitions. Word has length 33 [2021-10-24 10:20:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:20:22,364 INFO L470 AbstractCegarLoop]: Abstraction has 1014 states and 4102 transitions. [2021-10-24 10:20:22,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 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 10:20:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 4102 transitions. [2021-10-24 10:20:22,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-24 10:20:22,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:20:22,370 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, 1, 1, 1, 1, 1, 1] [2021-10-24 10:20:22,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-24 10:20:22,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-24 10:20:22,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-24 10:20:22,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:20:22,986 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-24 10:20:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:20:22,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1130950898, now seen corresponding path program 1 times [2021-10-24 10:20:22,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:20:22,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675869508] [2021-10-24 10:20:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:20:22,987 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:20:22,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:20:22,988 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:20:22,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-24 10:20:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:20:27,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-24 10:20:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:20:27,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:20:27,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:20:27,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:20:27,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:20:27,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:20:27,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:20:27,509 INFO L354 Elim1Store]: treesize reduction 378, result has 13.5 percent of original size [2021-10-24 10:20:27,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 69 [2021-10-24 10:20:28,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:20:28,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:20:28,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:20:28,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:20:28,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:20:28,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:20:28,678 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-24 10:20:28,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 38 [2021-10-24 10:23:37,465 WARN L207 SmtUtils]: Spent 3.13 m on a formula simplification. DAG size of input: 375 DAG size of output: 106 [2021-10-24 10:23:37,468 INFO L354 Elim1Store]: treesize reduction 2187, result has 12.2 percent of original size [2021-10-24 10:23:37,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 121 treesize of output 346 [2021-10-24 10:26:00,010 WARN L207 SmtUtils]: Spent 1.52 m on a formula simplification. DAG size of input: 112 DAG size of output: 97 [2021-10-24 10:31:39,589 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-24 10:31:39,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:31:39,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675869508] [2021-10-24 10:31:39,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-10-24 10:31:39,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1837755326] [2021-10-24 10:31:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:31:39,590 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:31:39,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:31:39,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-24 10:31:39,592 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:31:39,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-24 10:31:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:31:41,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-24 10:31:41,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:31:41,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-24 10:31:41,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160352051] [2021-10-24 10:31:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:31:41,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:31:41,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:31:41,767 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:31:41,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-24 10:31:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:31:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-24 10:31:42,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:31:42,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-24 10:31:42,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:31:42,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-24 10:31:42,734 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-24 10:31:42,734 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-24 10:31:42,738 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:31:42,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-24 10:31:42,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-24 10:31:42,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-24 10:31:42,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-24 10:31:42,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-10-24 10:31:42,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-24 10:31:43,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-24 10:31:43,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b80f0-4989-419b-9080-5ee069ff5bd0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:31:43,346 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-24 10:31:43,346 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:31:43,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:31:43 BasicIcfg [2021-10-24 10:31:43,387 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:31:43,388 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:31:43,388 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:31:43,388 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:31:43,389 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:19:22" (3/4) ... [2021-10-24 10:31:43,398 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 10:31:43,403 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:31:43,404 INFO L168 Benchmark]: Toolchain (without parser) took 743371.51 ms. Allocated memory was 48.2 MB in the beginning and 197.1 MB in the end (delta: 148.9 MB). Free memory was 32.7 MB in the beginning and 98.8 MB in the end (delta: -66.2 MB). Peak memory consumption was 82.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:31:43,405 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 48.2 MB. Free memory was 29.2 MB in the beginning and 29.2 MB in the end (delta: 52.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:31:43,405 INFO L168 Benchmark]: CACSL2BoogieTranslator took 476.51 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 32.4 MB in the beginning and 39.6 MB in the end (delta: -7.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-24 10:31:43,406 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.93 ms. Allocated memory is still 58.7 MB. Free memory was 39.5 MB in the beginning and 36.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:31:43,406 INFO L168 Benchmark]: Boogie Preprocessor took 49.36 ms. Allocated memory is still 58.7 MB. Free memory was 36.8 MB in the beginning and 34.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:31:43,407 INFO L168 Benchmark]: RCFGBuilder took 2316.83 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 34.3 MB in the beginning and 53.3 MB in the end (delta: -19.0 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:31:43,407 INFO L168 Benchmark]: TraceAbstraction took 740423.84 ms. Allocated memory was 77.6 MB in the beginning and 197.1 MB in the end (delta: 119.5 MB). Free memory was 52.9 MB in the beginning and 98.8 MB in the end (delta: -45.9 MB). Peak memory consumption was 72.6 MB. Max. memory is 16.1 GB. [2021-10-24 10:31:43,407 INFO L168 Benchmark]: Witness Printer took 15.54 ms. Allocated memory is still 197.1 MB. Free memory is still 98.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:31:43,410 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 48.2 MB. Free memory was 29.2 MB in the beginning and 29.2 MB in the end (delta: 52.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 476.51 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 32.4 MB in the beginning and 39.6 MB in the end (delta: -7.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.93 ms. Allocated memory is still 58.7 MB. Free memory was 39.5 MB in the beginning and 36.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.36 ms. Allocated memory is still 58.7 MB. Free memory was 36.8 MB in the beginning and 34.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2316.83 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 34.3 MB in the beginning and 53.3 MB in the end (delta: -19.0 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 740423.84 ms. Allocated memory was 77.6 MB in the beginning and 197.1 MB in the end (delta: 119.5 MB). Free memory was 52.9 MB in the beginning and 98.8 MB in the end (delta: -45.9 MB). Peak memory consumption was 72.6 MB. Max. memory is 16.1 GB. * Witness Printer took 15.54 ms. Allocated memory is still 197.1 MB. Free memory is still 98.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 30837.2ms, 216 PlacesBefore, 46 PlacesAfterwards, 225 TransitionsBefore, 40 TransitionsAfterwards, 1376 CoEnabledTransitionPairs, 8 FixpointIterations, 147 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 31 TrivialYvCompositions, 8 ConcurrentYvCompositions, 15 ChoiceCompositions, 224 TotalNumberOfCompositions, 3508 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2101, positive: 1965, positive conditional: 0, positive unconditional: 1965, negative: 136, negative conditional: 0, negative unconditional: 136, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 959, positive: 932, positive conditional: 0, positive unconditional: 932, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 959, positive: 929, positive conditional: 0, positive unconditional: 929, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 30, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1451, positive: 141, positive conditional: 0, positive unconditional: 141, negative: 1310, negative conditional: 0, negative unconditional: 1310, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2101, positive: 1033, positive conditional: 0, positive unconditional: 1033, negative: 109, negative conditional: 0, negative unconditional: 109, unknown: 959, unknown conditional: 0, unknown unconditional: 959] , Statistics on independence cache: Total cache size (in pairs): 139, Positive cache size: 127, Positive conditional cache size: 0, Positive unconditional cache size: 127, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12 - 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 - UnprovableResult [Line: 131]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L41] 0 int *q1, *q2, *f; [L42] 0 int q1_front, q1_back, q2_front, q2_back, i, j, n1, n2, N, total; [L105] 0 pthread_t t1, t2, t3, t4; [L107] 0 N = __VERIFIER_nondet_int() [L108] 0 n1 = __VERIFIER_nondet_int() [L109] 0 n2 = __VERIFIER_nondet_int() [L110] 0 q1_front = __VERIFIER_nondet_int() [L111] 0 q1_back = q1_front [L112] 0 q2_front = __VERIFIER_nondet_int() [L113] 0 q2_back = q2_front [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L140] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L141] 0 int i = 0; [L141] COND TRUE 0 i < size [L142] 0 arr[i] = __VERIFIER_nondet_int() [L141] 0 i++ [L141] COND FALSE 0 !(i < size) [L144] 0 return arr; [L114] 0 q1 = create_fresh_int_array(n1) [L38] COND TRUE 0 !cond [L38] COND FALSE 0 !(!cond) [L140] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L141] 0 int i = 0; [L141] COND TRUE 0 i < size [L142] 0 arr[i] = __VERIFIER_nondet_int() [L141] 0 i++ [L141] COND FALSE 0 !(i < size) [L144] 0 return arr; [L115] 0 q2 = create_fresh_int_array(n2) [L38] COND FALSE 0 !(!cond) [L38] COND TRUE 0 !cond [L140] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L141] 0 int i = 0; [L141] COND TRUE 0 i < size [L142] 0 arr[i] = __VERIFIER_nondet_int() [L141] 0 i++ [L141] COND FALSE 0 !(i < size) [L144] 0 return arr; [L116] 0 f = create_fresh_int_array(N) [L38] COND FALSE 0 !(!cond) [L121] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L48] COND TRUE 1 i < N [L38] COND TRUE 1 !cond [L51] 1 q1[q1_back] [L51] 1 f[i] [L38] COND TRUE 1 !cond [L38] COND FALSE 1 !(!cond) [L53] 1 q1_back++ [L122] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) [L64] COND TRUE 2 j < N [L38] COND TRUE 2 !cond [L67] 2 f[j] [L38] COND TRUE 2 !cond [L68] 2 q2[q2_back] [L68] 2 f[j] [L38] COND TRUE 2 !cond [L38] COND FALSE 2 !(!cond) [L70] 2 q2_back++ [L73] 2 j++ [L64] COND FALSE 2 !(j < N) [L77] 2 return 0; [L56] 1 i++ [L48] COND FALSE 1 !(i < N) [L60] 1 return 0; [L123] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) [L81] COND TRUE 3 i < N || q1_front < q1_back [L38] COND FALSE 3 !(!cond) [L84] EXPR 3 q1[q1_front] [L38] COND TRUE 3 !cond [L38] COND TRUE 3 !cond [L150] 3 return a + b; [L84] 3 total = plus(total, q1[q1_front]) [L85] 3 q1_front++ [L124] FCALL, FORK 0 pthread_create(&t4, 0, thread4, 0) [L125] 0 \read(t1) [L125] FCALL, JOIN 1 pthread_join(t1, 0) [L126] 0 \read(t2) [L126] FCALL, JOIN 2 pthread_join(t2, 0) [L127] 0 \read(t3) [L89] 3 return 0; [L127] FCALL, JOIN 3 pthread_join(t3, 0) [L128] 0 \read(t4) [L93] COND TRUE 4 j < N || q2_front < q2_back [L38] COND TRUE 4 !cond [L96] EXPR 4 q2[q2_front] [L38] COND TRUE 4 !cond [L38] COND TRUE 4 !cond [L150] 4 return a + b; [L96] 4 total = plus(total, q2[q2_front]) [L97] 4 q2_front++ [L93] COND FALSE 4 !(j < N || q2_front < q2_back) [L101] 4 return 0; [L128] FCALL, JOIN 4 pthread_join(t4, 0) [L38] COND FALSE 0 !(!cond) [L131] 0 reach_error() - UnprovableResult [Line: 122]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 121]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 123]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 124]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 230 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 740227.1ms, OverallIterations: 12, TraceHistogramMax: 1, EmptinessCheckTime: 95.5ms, AutomataDifference: 5858.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30942.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 446 SDtfs, 1431 SDslu, 1528 SDs, 0 SdLazy, 854 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3844.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1023 GetRequests, 921 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2485.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1059occurred in iteration=6, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 809.4ms AutomataMinimizationTime, 11 MinimizatonAttempts, 5644 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 481.2ms SsaConstructionTime, 2601.0ms SatisfiabilityAnalysisTime, 10645.8ms InterpolantComputationTime, 520 NumberOfCodeBlocks, 520 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 1004 ConstructedInterpolants, 30 QuantifiedInterpolants, 5525 SizeOfPredicates, 98 NumberOfNonLiveVariables, 3035 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 36 InterpolantComputations, 14 PerfectInterpolantSequences, 85/112 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...