./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.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_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/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_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/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_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/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 e599c71ae23c1c740ec040dc27db8784985b683d3ae0137c6d454b30746b2de7 ............................................................................................................................................ 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_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/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_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/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_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/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 e599c71ae23c1c740ec040dc27db8784985b683d3ae0137c6d454b30746b2de7 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 09:41:55,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:41:55,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:41:56,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:41:56,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:41:56,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:41:56,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:41:56,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:41:56,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:41:56,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:41:56,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:41:56,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:41:56,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:41:56,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:41:56,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:41:56,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:41:56,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:41:56,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:41:56,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:41:56,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:41:56,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:41:56,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:41:56,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:41:56,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:41:56,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:41:56,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:41:56,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:41:56,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:41:56,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:41:56,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:41:56,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:41:56,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:41:56,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:41:56,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:41:56,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:41:56,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:41:56,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:41:56,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:41:56,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:41:56,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:41:56,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:41:56,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 09:41:56,122 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:41:56,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:41:56,124 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:41:56,124 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:41:56,124 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:41:56,124 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:41:56,124 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 09:41:56,125 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:41:56,131 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:41:56,131 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 09:41:56,132 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 09:41:56,132 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:41:56,133 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 09:41:56,133 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 09:41:56,133 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 09:41:56,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:41:56,134 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:41:56,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 09:41:56,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:41:56,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:41:56,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 09:41:56,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:41:56,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 09:41:56,136 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:41:56,136 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:41:56,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 09:41:56,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:41:56,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 09:41:56,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:41:56,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:41:56,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:41:56,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:41:56,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:41:56,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 09:41:56,140 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 09:41:56,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 09:41:56,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 09:41:56,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:41:56,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:41:56,141 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_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e599c71ae23c1c740ec040dc27db8784985b683d3ae0137c6d454b30746b2de7 [2021-10-24 09:41:56,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:41:56,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:41:56,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:41:56,441 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:41:56,442 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:41:56,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2021-10-24 09:41:56,537 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/data/d5fea9b62/7f074c5acd10456aa739a5a0b0e25d2c/FLAG1dce04f2a [2021-10-24 09:41:57,059 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:41:57,062 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2021-10-24 09:41:57,074 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/data/d5fea9b62/7f074c5acd10456aa739a5a0b0e25d2c/FLAG1dce04f2a [2021-10-24 09:41:57,423 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/data/d5fea9b62/7f074c5acd10456aa739a5a0b0e25d2c [2021-10-24 09:41:57,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:41:57,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:41:57,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:41:57,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:41:57,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:41:57,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:41:57" (1/1) ... [2021-10-24 09:41:57,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5521bc43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:41:57, skipping insertion in model container [2021-10-24 09:41:57,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:41:57" (1/1) ... [2021-10-24 09:41:57,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:41:57,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:41:57,774 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_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[3568,3581] [2021-10-24 09:41:57,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:41:57,807 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 09:41:57,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4fb85114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:41:57, skipping insertion in model container [2021-10-24 09:41:57,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:41:57,809 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-24 09:41:57,811 INFO L168 Benchmark]: Toolchain (without parser) took 383.25 ms. Allocated memory was 83.9 MB in the beginning and 119.5 MB in the end (delta: 35.7 MB). Free memory was 51.4 MB in the beginning and 95.1 MB in the end (delta: -43.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 09:41:57,813 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 83.9 MB. Free memory is still 39.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:41:57,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.27 ms. Allocated memory was 83.9 MB in the beginning and 119.5 MB in the end (delta: 35.7 MB). Free memory was 51.2 MB in the beginning and 95.5 MB in the end (delta: -44.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 09:41:57,817 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 83.9 MB. Free memory is still 39.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 368.27 ms. Allocated memory was 83.9 MB in the beginning and 119.5 MB in the end (delta: 35.7 MB). Free memory was 51.2 MB in the beginning and 95.5 MB in the end (delta: -44.3 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: 136]: 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 09:42:00,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:42:00,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:42:00,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:42:00,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:42:00,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:42:00,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:42:00,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:42:00,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:42:00,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:42:00,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:42:00,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:42:00,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:42:00,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:42:00,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:42:00,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:42:00,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:42:00,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:42:00,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:42:00,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:42:00,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:42:00,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:42:00,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:42:00,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:42:00,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:42:00,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:42:00,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:42:00,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:42:00,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:42:00,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:42:00,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:42:00,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:42:00,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:42:00,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:42:00,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:42:00,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:42:00,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:42:00,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:42:00,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:42:00,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:42:00,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:42:00,222 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 09:42:00,267 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:42:00,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:42:00,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:42:00,268 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:42:00,269 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:42:00,269 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:42:00,269 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:42:00,269 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:42:00,270 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:42:00,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:42:00,272 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:42:00,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:42:00,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:42:00,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 09:42:00,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:42:00,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 09:42:00,273 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:42:00,274 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 09:42:00,274 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 09:42:00,274 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:42:00,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 09:42:00,274 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:42:00,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 09:42:00,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:42:00,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 09:42:00,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:42:00,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:42:00,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:42:00,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:42:00,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 09:42:00,277 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 09:42:00,277 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 09:42:00,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 09:42:00,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:42:00,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:42:00,278 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_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e599c71ae23c1c740ec040dc27db8784985b683d3ae0137c6d454b30746b2de7 [2021-10-24 09:42:00,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:42:00,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:42:00,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:42:00,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:42:00,663 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:42:00,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2021-10-24 09:42:00,740 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/data/04e876e25/6b8f83d865984df7ab20847877c54dcc/FLAG6640db0d9 [2021-10-24 09:42:01,192 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:42:01,193 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2021-10-24 09:42:01,203 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/data/04e876e25/6b8f83d865984df7ab20847877c54dcc/FLAG6640db0d9 [2021-10-24 09:42:01,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/data/04e876e25/6b8f83d865984df7ab20847877c54dcc [2021-10-24 09:42:01,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:42:01,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:42:01,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:42:01,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:42:01,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:42:01,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:42:01" (1/1) ... [2021-10-24 09:42:01,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c38b3e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:42:01, skipping insertion in model container [2021-10-24 09:42:01,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:42:01" (1/1) ... [2021-10-24 09:42:01,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:42:01,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:42:01,821 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_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[3568,3581] [2021-10-24 09:42:01,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:42:01,843 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-24 09:42:01,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:42:01,894 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_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[3568,3581] [2021-10-24 09:42:01,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:42:01,918 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 09:42:01,974 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_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[3568,3581] [2021-10-24 09:42:01,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:42:02,020 INFO L208 MainTranslator]: Completed translation [2021-10-24 09:42:02,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:42:02 WrapperNode [2021-10-24 09:42:02,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:42:02,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 09:42:02,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 09:42:02,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 09:42:02,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:42:02" (1/1) ... [2021-10-24 09:42:02,056 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:42:02" (1/1) ... [2021-10-24 09:42:02,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 09:42:02,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 09:42:02,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 09:42:02,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 09:42:02,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:42:02" (1/1) ... [2021-10-24 09:42:02,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:42:02" (1/1) ... [2021-10-24 09:42:02,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:42:02" (1/1) ... [2021-10-24 09:42:02,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:42:02" (1/1) ... [2021-10-24 09:42:02,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:42:02" (1/1) ... [2021-10-24 09:42:02,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:42:02" (1/1) ... [2021-10-24 09:42:02,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:42:02" (1/1) ... [2021-10-24 09:42:02,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 09:42:02,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 09:42:02,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 09:42:02,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 09:42:02,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:42:02" (1/1) ... [2021-10-24 09:42:02,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:42:02,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:42:02,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 09:42:02,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 09:42:02,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 09:42:02,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 09:42:02,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 09:42:02,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-24 09:42:02,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-24 09:42:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-24 09:42:02,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-24 09:42:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-24 09:42:02,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-24 09:42:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-24 09:42:02,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-24 09:42:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-24 09:42:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-24 09:42:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 09:42:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 09:42:02,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 09:42:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 09:42:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 09:42:02,260 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 09:42:04,280 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 09:42:04,280 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2021-10-24 09:42:04,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:42:04 BoogieIcfgContainer [2021-10-24 09:42:04,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 09:42:04,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 09:42:04,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 09:42:04,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 09:42:04,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:42:01" (1/3) ... [2021-10-24 09:42:04,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33cf27ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:42:04, skipping insertion in model container [2021-10-24 09:42:04,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:42:02" (2/3) ... [2021-10-24 09:42:04,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33cf27ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:42:04, skipping insertion in model container [2021-10-24 09:42:04,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:42:04" (3/3) ... [2021-10-24 09:42:04,294 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2021-10-24 09:42:04,299 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-24 09:42:04,299 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 09:42:04,300 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 09:42:04,300 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-24 09:42:04,356 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,358 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,358 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,358 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,358 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,358 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,358 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,359 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,359 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,359 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,359 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,360 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,360 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,360 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,360 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,360 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,360 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,360 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,361 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,361 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,361 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,361 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,361 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,361 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,362 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,362 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,362 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,362 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,363 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,363 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,363 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,363 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,363 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,363 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,363 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,364 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,364 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,364 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,364 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,364 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,364 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,364 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,365 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,365 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,365 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,365 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,365 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,365 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,365 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,366 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,366 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,366 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,366 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,367 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,367 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,367 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,367 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,367 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,367 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,368 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,368 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,368 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,368 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,368 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,368 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,369 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,369 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,369 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,369 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,369 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,369 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,369 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,370 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,370 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,370 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,373 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,373 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,373 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,374 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,374 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,374 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,374 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,374 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,374 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,375 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,375 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,375 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,377 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,377 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,377 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,378 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,378 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,378 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,378 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,378 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,380 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,380 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,380 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,380 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,380 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,380 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,381 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,381 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,381 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,381 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,381 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,381 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,383 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,384 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,384 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,384 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,384 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,384 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,384 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,385 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,385 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 09:42:04,391 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-24 09:42:04,434 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 09:42:04,441 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 09:42:04,441 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-24 09:42:04,457 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-24 09:42:04,466 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 214 places, 223 transitions, 478 flow [2021-10-24 09:42:04,469 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 214 places, 223 transitions, 478 flow [2021-10-24 09:42:04,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 214 places, 223 transitions, 478 flow [2021-10-24 09:42:04,580 INFO L129 PetriNetUnfolder]: 22/219 cut-off events. [2021-10-24 09:42:04,581 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-24 09:42:04,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 219 events. 22/219 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 102 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 185. Up to 2 conditions per place. [2021-10-24 09:42:04,590 INFO L116 LiptonReduction]: Number of co-enabled transitions 1224 [2021-10-24 09:42:28,899 WARN L207 SmtUtils]: Spent 5.13 s on a formula simplification. DAG size of input: 175 DAG size of output: 174 [2021-10-24 09:42:30,579 INFO L131 LiptonReduction]: Checked pairs total: 2319 [2021-10-24 09:42:30,580 INFO L133 LiptonReduction]: Total number of compositions: 226 [2021-10-24 09:42:30,588 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 38 transitions, 108 flow [2021-10-24 09:42:30,612 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 175 states, 174 states have (on average 3.8620689655172415) internal successors, (672), 174 states have internal predecessors, (672), 0 states have call successors, (0), 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 09:42:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 174 states have (on average 3.8620689655172415) internal successors, (672), 174 states have internal predecessors, (672), 0 states have call successors, (0), 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 09:42:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-24 09:42:30,627 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:42:30,627 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 09:42:30,628 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 09:42:30,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:42:30,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1992424902, now seen corresponding path program 1 times [2021-10-24 09:42:30,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:42:30,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709595775] [2021-10-24 09:42:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:30,648 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:42:30,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:42:30,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:42:30,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 09:42:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:30,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 09:42:30,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:31,047 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 09:42:31,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:31,193 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 09:42:31,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:42:31,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709595775] [2021-10-24 09:42:31,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709595775] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:42:31,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:42:31,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-24 09:42:31,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258878947] [2021-10-24 09:42:31,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:42:31,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:42:31,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:42:31,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:42:31,243 INFO L87 Difference]: Start difference. First operand has 175 states, 174 states have (on average 3.8620689655172415) internal successors, (672), 174 states have internal predecessors, (672), 0 states have call successors, (0), 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 09:42:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:42:31,356 INFO L93 Difference]: Finished difference Result 332 states and 1303 transitions. [2021-10-24 09:42:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:42:31,358 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 09:42:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:42:31,389 INFO L225 Difference]: With dead ends: 332 [2021-10-24 09:42:31,404 INFO L226 Difference]: Without dead ends: 315 [2021-10-24 09:42:31,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:42:31,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-10-24 09:42:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 235. [2021-10-24 09:42:31,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.905982905982906) internal successors, (914), 234 states have internal predecessors, (914), 0 states have call successors, (0), 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 09:42:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 914 transitions. [2021-10-24 09:42:31,503 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 914 transitions. Word has length 24 [2021-10-24 09:42:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:42:31,504 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 914 transitions. [2021-10-24 09:42:31,504 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 09:42:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 914 transitions. [2021-10-24 09:42:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-24 09:42:31,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:42:31,509 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 09:42:31,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:31,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:42:31,723 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 09:42:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:42:31,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1075556984, now seen corresponding path program 1 times [2021-10-24 09:42:31,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:42:31,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606219517] [2021-10-24 09:42:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:31,726 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:42:31,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:42:31,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:42:31,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 09:42:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 09:42:31,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:32,015 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 09:42:32,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:32,191 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 09:42:32,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:42:32,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606219517] [2021-10-24 09:42:32,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606219517] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:42:32,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:42:32,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-24 09:42:32,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082182566] [2021-10-24 09:42:32,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 09:42:32,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:42:32,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 09:42:32,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 09:42:32,195 INFO L87 Difference]: Start difference. First operand 235 states and 914 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 09:42:32,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:42:32,262 INFO L93 Difference]: Finished difference Result 531 states and 1948 transitions. [2021-10-24 09:42:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 09:42:32,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 09:42:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:42:32,279 INFO L225 Difference]: With dead ends: 531 [2021-10-24 09:42:32,279 INFO L226 Difference]: Without dead ends: 487 [2021-10-24 09:42:32,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 09:42:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-10-24 09:42:32,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 331. [2021-10-24 09:42:32,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.9454545454545453) internal successors, (1302), 330 states have internal predecessors, (1302), 0 states have call successors, (0), 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 09:42:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1302 transitions. [2021-10-24 09:42:32,324 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1302 transitions. Word has length 26 [2021-10-24 09:42:32,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:42:32,324 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 1302 transitions. [2021-10-24 09:42:32,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 09:42:32,325 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1302 transitions. [2021-10-24 09:42:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-24 09:42:32,334 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:42:32,334 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 09:42:32,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:32,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:42:32,554 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 09:42:32,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:42:32,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1666493896, now seen corresponding path program 1 times [2021-10-24 09:42:32,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:42:32,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411183361] [2021-10-24 09:42:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:32,556 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:42:32,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:42:32,557 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:42:32,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 09:42:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:32,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 09:42:32,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:32,835 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 09:42:32,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:32,934 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 09:42:32,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:42:32,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411183361] [2021-10-24 09:42:32,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411183361] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:42:32,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1073226503] [2021-10-24 09:42:32,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:32,935 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 09:42:32,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 09:42:32,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 09:42:32,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-24 09:42:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:33,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 09:42:33,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:33,335 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 09:42:33,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:33,457 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 09:42:33,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1073226503] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:42:33,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-24 09:42:33,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [3, 3] total 8 [2021-10-24 09:42:33,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351031946] [2021-10-24 09:42:33,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 09:42:33,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:42:33,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 09:42:33,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-24 09:42:33,460 INFO L87 Difference]: Start difference. First operand 331 states and 1302 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:42:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:42:33,595 INFO L93 Difference]: Finished difference Result 632 states and 2289 transitions. [2021-10-24 09:42:33,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 09:42:33,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-24 09:42:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:42:33,603 INFO L225 Difference]: With dead ends: 632 [2021-10-24 09:42:33,604 INFO L226 Difference]: Without dead ends: 526 [2021-10-24 09:42:33,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-24 09:42:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-10-24 09:42:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 486. [2021-10-24 09:42:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.7463917525773196) internal successors, (1817), 485 states have internal predecessors, (1817), 0 states have call successors, (0), 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 09:42:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1817 transitions. [2021-10-24 09:42:33,636 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1817 transitions. Word has length 26 [2021-10-24 09:42:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:42:33,636 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1817 transitions. [2021-10-24 09:42:33,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:42:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1817 transitions. [2021-10-24 09:42:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-24 09:42:33,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:42:33,642 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 09:42:33,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:33,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:34,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:42:34,046 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 09:42:34,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:42:34,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1966124484, now seen corresponding path program 1 times [2021-10-24 09:42:34,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:42:34,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011934299] [2021-10-24 09:42:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:34,047 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:42:34,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:42:34,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:42:34,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 09:42:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:34,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 09:42:34,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:34,329 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 09:42:34,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:34,427 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 09:42:34,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:42:34,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011934299] [2021-10-24 09:42:34,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011934299] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:42:34,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:42:34,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-24 09:42:34,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094549059] [2021-10-24 09:42:34,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 09:42:34,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:42:34,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 09:42:34,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-24 09:42:34,429 INFO L87 Difference]: Start difference. First operand 486 states and 1817 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 09:42:34,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:42:34,582 INFO L93 Difference]: Finished difference Result 689 states and 2421 transitions. [2021-10-24 09:42:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 09:42:34,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 27 [2021-10-24 09:42:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:42:34,591 INFO L225 Difference]: With dead ends: 689 [2021-10-24 09:42:34,591 INFO L226 Difference]: Without dead ends: 641 [2021-10-24 09:42:34,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-24 09:42:34,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-10-24 09:42:34,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 537. [2021-10-24 09:42:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.7257462686567164) internal successors, (1997), 536 states have internal predecessors, (1997), 0 states have call successors, (0), 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 09:42:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1997 transitions. [2021-10-24 09:42:34,621 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1997 transitions. Word has length 27 [2021-10-24 09:42:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:42:34,622 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1997 transitions. [2021-10-24 09:42:34,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 09:42:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1997 transitions. [2021-10-24 09:42:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-24 09:42:34,626 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:42:34,626 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 09:42:34,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:34,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:42:34,839 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 09:42:34,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:42:34,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1067253524, now seen corresponding path program 1 times [2021-10-24 09:42:34,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:42:34,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112578234] [2021-10-24 09:42:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:34,840 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:42:34,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:42:34,841 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:42:34,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 09:42:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:35,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 09:42:35,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:35,156 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 09:42:35,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:35,256 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 09:42:35,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:42:35,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112578234] [2021-10-24 09:42:35,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112578234] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:42:35,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1310533497] [2021-10-24 09:42:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:35,257 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 09:42:35,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 09:42:35,258 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 09:42:35,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-24 09:42:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:35,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 09:42:35,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:35,942 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 09:42:35,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:36,403 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 09:42:36,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1310533497] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:42:36,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452520831] [2021-10-24 09:42:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:36,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:42:36,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:42:36,411 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 09:42:36,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-24 09:42:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:36,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 09:42:36,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:36,917 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 09:42:36,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:37,227 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 09:42:37,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452520831] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:42:37,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 09:42:37,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 6, 7, 6, 5] total 14 [2021-10-24 09:42:37,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113510274] [2021-10-24 09:42:37,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-24 09:42:37,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:42:37,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-24 09:42:37,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-10-24 09:42:37,229 INFO L87 Difference]: Start difference. First operand 537 states and 1997 transitions. Second operand has 15 states, 15 states have (on average 5.8) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:42:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:42:37,816 INFO L93 Difference]: Finished difference Result 1379 states and 5088 transitions. [2021-10-24 09:42:37,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 09:42:37,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-24 09:42:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:42:37,832 INFO L225 Difference]: With dead ends: 1379 [2021-10-24 09:42:37,832 INFO L226 Difference]: Without dead ends: 1271 [2021-10-24 09:42:37,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-10-24 09:42:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-10-24 09:42:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 712. [2021-10-24 09:42:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 4.0) internal successors, (2844), 711 states have internal predecessors, (2844), 0 states have call successors, (0), 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 09:42:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2844 transitions. [2021-10-24 09:42:37,886 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2844 transitions. Word has length 27 [2021-10-24 09:42:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:42:37,886 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 2844 transitions. [2021-10-24 09:42:37,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:42:37,887 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2844 transitions. [2021-10-24 09:42:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 09:42:37,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:42:37,890 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 09:42:37,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:38,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:38,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:38,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:42:38,500 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 09:42:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:42:38,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1019093682, now seen corresponding path program 1 times [2021-10-24 09:42:38,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:42:38,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292222400] [2021-10-24 09:42:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:38,502 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:42:38,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:42:38,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:42:38,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-24 09:42:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 09:42:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:39,052 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 09:42:39,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:39,263 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 09:42:39,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:42:39,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292222400] [2021-10-24 09:42:39,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292222400] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 09:42:39,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 09:42:39,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-24 09:42:39,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687795800] [2021-10-24 09:42:39,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 09:42:39,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:42:39,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 09:42:39,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-24 09:42:39,265 INFO L87 Difference]: Start difference. First operand 712 states and 2844 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 09:42:39,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:42:39,638 INFO L93 Difference]: Finished difference Result 1110 states and 3840 transitions. [2021-10-24 09:42:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 09:42:39,639 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 28 [2021-10-24 09:42:39,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:42:39,649 INFO L225 Difference]: With dead ends: 1110 [2021-10-24 09:42:39,649 INFO L226 Difference]: Without dead ends: 946 [2021-10-24 09:42:39,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-24 09:42:39,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-10-24 09:42:39,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 614. [2021-10-24 09:42:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.7862969004893965) internal successors, (2321), 613 states have internal predecessors, (2321), 0 states have call successors, (0), 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 09:42:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2321 transitions. [2021-10-24 09:42:39,682 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2321 transitions. Word has length 28 [2021-10-24 09:42:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:42:39,682 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 2321 transitions. [2021-10-24 09:42:39,683 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 09:42:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2321 transitions. [2021-10-24 09:42:39,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 09:42:39,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:42:39,686 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 09:42:39,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:39,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:42:39,902 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 09:42:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:42:39,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2005632420, now seen corresponding path program 2 times [2021-10-24 09:42:39,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:42:39,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147103470] [2021-10-24 09:42:39,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 09:42:39,904 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:42:39,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:42:39,904 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:42:39,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-24 09:42:40,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 09:42:40,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 09:42:40,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 09:42:40,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:40,648 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 09:42:40,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:41,026 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 09:42:41,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:42:41,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147103470] [2021-10-24 09:42:41,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147103470] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:42:41,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:42:41,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-24 09:42:41,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914367680] [2021-10-24 09:42:41,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 09:42:41,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:42:41,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 09:42:41,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-24 09:42:41,028 INFO L87 Difference]: Start difference. First operand 614 states and 2321 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 09:42:41,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:42:41,390 INFO L93 Difference]: Finished difference Result 812 states and 2772 transitions. [2021-10-24 09:42:41,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 09:42:41,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 09:42:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:42:41,401 INFO L225 Difference]: With dead ends: 812 [2021-10-24 09:42:41,401 INFO L226 Difference]: Without dead ends: 802 [2021-10-24 09:42:41,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-24 09:42:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-10-24 09:42:41,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 600. [2021-10-24 09:42:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.7846410684474123) internal successors, (2267), 599 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:42:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 2267 transitions. [2021-10-24 09:42:41,453 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 2267 transitions. Word has length 28 [2021-10-24 09:42:41,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:42:41,453 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 2267 transitions. [2021-10-24 09:42:41,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 09:42:41,453 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 2267 transitions. [2021-10-24 09:42:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 09:42:41,456 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:42:41,456 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 09:42:41,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:41,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:42:41,669 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 09:42:41,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:42:41,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1090029034, now seen corresponding path program 3 times [2021-10-24 09:42:41,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:42:41,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350734073] [2021-10-24 09:42:41,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 09:42:41,671 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:42:41,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:42:41,672 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:42:41,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-24 09:42:42,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 09:42:42,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 09:42:42,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 09:42:42,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:42,499 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 09:42:42,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:42,909 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 09:42:42,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:42:42,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350734073] [2021-10-24 09:42:42,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350734073] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:42:42,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:42:42,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-24 09:42:42,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544423808] [2021-10-24 09:42:42,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 09:42:42,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:42:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 09:42:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-24 09:42:42,911 INFO L87 Difference]: Start difference. First operand 600 states and 2267 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 09:42:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:42:43,276 INFO L93 Difference]: Finished difference Result 646 states and 2262 transitions. [2021-10-24 09:42:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 09:42:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 09:42:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:42:43,283 INFO L225 Difference]: With dead ends: 646 [2021-10-24 09:42:43,283 INFO L226 Difference]: Without dead ends: 588 [2021-10-24 09:42:43,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-24 09:42:43,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-10-24 09:42:43,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 455. [2021-10-24 09:42:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.790748898678414) internal successors, (1721), 454 states have internal predecessors, (1721), 0 states have call successors, (0), 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 09:42:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1721 transitions. [2021-10-24 09:42:43,304 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1721 transitions. Word has length 28 [2021-10-24 09:42:43,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:42:43,304 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1721 transitions. [2021-10-24 09:42:43,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 09:42:43,304 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1721 transitions. [2021-10-24 09:42:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 09:42:43,306 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:42:43,307 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 09:42:43,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:43,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:42:43,520 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 09:42:43,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:42:43,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2063297347, now seen corresponding path program 1 times [2021-10-24 09:42:43,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:42:43,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065532631] [2021-10-24 09:42:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:43,521 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:42:43,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:42:43,522 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:42:43,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-24 09:42:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:43,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 09:42:43,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:44,101 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 09:42:44,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:44,369 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 09:42:44,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:42:44,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065532631] [2021-10-24 09:42:44,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065532631] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 09:42:44,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 09:42:44,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-24 09:42:44,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916092839] [2021-10-24 09:42:44,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 09:42:44,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:42:44,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 09:42:44,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-24 09:42:44,371 INFO L87 Difference]: Start difference. First operand 455 states and 1721 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 09:42:44,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:42:44,499 INFO L93 Difference]: Finished difference Result 561 states and 1983 transitions. [2021-10-24 09:42:44,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 09:42:44,500 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 28 [2021-10-24 09:42:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:42:44,505 INFO L225 Difference]: With dead ends: 561 [2021-10-24 09:42:44,505 INFO L226 Difference]: Without dead ends: 457 [2021-10-24 09:42:44,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-24 09:42:44,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-10-24 09:42:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2021-10-24 09:42:44,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.7785087719298245) internal successors, (1723), 456 states have internal predecessors, (1723), 0 states have call successors, (0), 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 09:42:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1723 transitions. [2021-10-24 09:42:44,526 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1723 transitions. Word has length 28 [2021-10-24 09:42:44,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:42:44,526 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1723 transitions. [2021-10-24 09:42:44,526 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 09:42:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1723 transitions. [2021-10-24 09:42:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 09:42:44,528 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:42:44,529 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 09:42:44,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-24 09:42:44,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:42:44,760 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 09:42:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:42:44,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1815954431, now seen corresponding path program 1 times [2021-10-24 09:42:44,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:42:44,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341875026] [2021-10-24 09:42:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:44,761 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:42:44,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:42:44,762 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:42:44,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-24 09:42:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:45,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 09:42:45,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:45,423 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 09:42:45,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:45,616 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 09:42:45,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:42:45,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341875026] [2021-10-24 09:42:45,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341875026] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:42:45,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1265913006] [2021-10-24 09:42:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:45,617 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 09:42:45,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 09:42:45,618 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 09:42:45,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-24 09:42:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:46,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 09:42:46,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:46,340 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 09:42:46,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:46,438 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 09:42:46,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1265913006] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:42:46,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774956452] [2021-10-24 09:42:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:46,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:42:46,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:42:46,439 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 09:42:46,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-24 09:42:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:46,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 09:42:46,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:46,996 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 09:42:46,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:47,084 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 09:42:47,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774956452] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:42:47,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 09:42:47,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 3, 3] total 14 [2021-10-24 09:42:47,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438933551] [2021-10-24 09:42:47,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-24 09:42:47,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:42:47,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-24 09:42:47,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-24 09:42:47,086 INFO L87 Difference]: Start difference. First operand 457 states and 1723 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 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 09:42:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:42:47,562 INFO L93 Difference]: Finished difference Result 809 states and 2929 transitions. [2021-10-24 09:42:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 09:42:47,563 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 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 09:42:47,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:42:47,570 INFO L225 Difference]: With dead ends: 809 [2021-10-24 09:42:47,571 INFO L226 Difference]: Without dead ends: 734 [2021-10-24 09:42:47,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 296.1ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-10-24 09:42:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-10-24 09:42:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 370. [2021-10-24 09:42:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.7642276422764227) internal successors, (1389), 369 states have internal predecessors, (1389), 0 states have call successors, (0), 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 09:42:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1389 transitions. [2021-10-24 09:42:47,589 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1389 transitions. Word has length 29 [2021-10-24 09:42:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:42:47,589 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1389 transitions. [2021-10-24 09:42:47,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 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 09:42:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1389 transitions. [2021-10-24 09:42:47,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-24 09:42:47,591 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:42:47,591 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] [2021-10-24 09:42:47,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:47,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:48,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:48,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 09:42:48,214 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 09:42:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:42:48,215 INFO L82 PathProgramCache]: Analyzing trace with hash -759618039, now seen corresponding path program 1 times [2021-10-24 09:42:48,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:42:48,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897658764] [2021-10-24 09:42:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:48,218 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:42:48,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:42:48,224 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:42:48,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-24 09:42:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 09:42:48,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:49,093 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 09:42:49,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:49,447 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 09:42:49,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:42:49,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897658764] [2021-10-24 09:42:49,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897658764] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 09:42:49,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 09:42:49,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-24 09:42:49,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198813852] [2021-10-24 09:42:49,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 09:42:49,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:42:49,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 09:42:49,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-24 09:42:49,449 INFO L87 Difference]: Start difference. First operand 370 states and 1389 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:42:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:42:49,951 INFO L93 Difference]: Finished difference Result 510 states and 1881 transitions. [2021-10-24 09:42:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 09:42:49,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-24 09:42:49,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:42:49,958 INFO L225 Difference]: With dead ends: 510 [2021-10-24 09:42:49,958 INFO L226 Difference]: Without dead ends: 510 [2021-10-24 09:42:49,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-24 09:42:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-10-24 09:42:49,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 334. [2021-10-24 09:42:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.7387387387387387) internal successors, (1245), 333 states have internal predecessors, (1245), 0 states have call successors, (0), 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 09:42:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1245 transitions. [2021-10-24 09:42:49,973 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1245 transitions. Word has length 31 [2021-10-24 09:42:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:42:49,973 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1245 transitions. [2021-10-24 09:42:49,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:42:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1245 transitions. [2021-10-24 09:42:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-24 09:42:49,975 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:42:49,975 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] [2021-10-24 09:42:49,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:50,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:42:50,189 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 09:42:50,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:42:50,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1982432841, now seen corresponding path program 1 times [2021-10-24 09:42:50,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:42:50,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471306199] [2021-10-24 09:42:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:50,190 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:42:50,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:42:50,192 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:42:50,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-24 09:42:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:50,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 09:42:50,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:50,963 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 09:42:50,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:51,286 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 09:42:51,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:42:51,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471306199] [2021-10-24 09:42:51,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471306199] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:42:51,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [319935109] [2021-10-24 09:42:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:51,288 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 09:42:51,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 09:42:51,290 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 09:42:51,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-24 09:42:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:51,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 09:42:51,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:52,271 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 09:42:52,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:52,434 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 09:42:52,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [319935109] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:42:52,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987465871] [2021-10-24 09:42:52,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:52,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:42:52,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:42:52,436 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 09:42:52,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-24 09:42:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:52,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 09:42:52,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:53,231 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 09:42:53,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:42:53,430 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 09:42:53,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987465871] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:42:53,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 09:42:53,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-10-24 09:42:53,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539066263] [2021-10-24 09:42:53,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-24 09:42:53,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:42:53,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-24 09:42:53,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-24 09:42:53,432 INFO L87 Difference]: Start difference. First operand 334 states and 1245 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 09:42:53,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:42:53,756 INFO L93 Difference]: Finished difference Result 736 states and 2822 transitions. [2021-10-24 09:42:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 09:42:53,757 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 31 [2021-10-24 09:42:53,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:42:53,763 INFO L225 Difference]: With dead ends: 736 [2021-10-24 09:42:53,763 INFO L226 Difference]: Without dead ends: 736 [2021-10-24 09:42:53,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-24 09:42:53,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-10-24 09:42:53,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 414. [2021-10-24 09:42:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.803874092009685) internal successors, (1571), 413 states have internal predecessors, (1571), 0 states have call successors, (0), 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 09:42:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1571 transitions. [2021-10-24 09:42:53,800 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1571 transitions. Word has length 31 [2021-10-24 09:42:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:42:53,801 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1571 transitions. [2021-10-24 09:42:53,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 09:42:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1571 transitions. [2021-10-24 09:42:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-24 09:42:53,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:42:53,803 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 09:42:53,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:54,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:54,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-24 09:42:54,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:42:54,409 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-24 09:42:54,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:42:54,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1641885365, now seen corresponding path program 1 times [2021-10-24 09:42:54,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:42:54,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010820742] [2021-10-24 09:42:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:42:54,414 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:42:54,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:42:54,416 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:42:54,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-24 09:42:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:42:55,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-24 09:42:55,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:42:55,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:42:55,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-10-24 09:47:28,271 WARN L207 SmtUtils]: Spent 4.52 m on a formula simplification. DAG size of input: 375 DAG size of output: 102 [2021-10-24 09:47:28,273 INFO L354 Elim1Store]: treesize reduction 2204, result has 11.5 percent of original size [2021-10-24 09:47:28,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 125 treesize of output 333 [2021-10-24 09:49:35,524 WARN L207 SmtUtils]: Spent 1.27 m on a formula simplification. DAG size of input: 112 DAG size of output: 92 [2021-10-24 09:50:53,081 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/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 09:50:53,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-24 09:50:53,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:50:53,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010820742] [2021-10-24 09:50:53,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/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 09:50:53,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [809118567] [2021-10-24 09:50:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:50:53,083 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 09:50:53,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 09:50:53,084 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 09:50:53,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-24 09:50:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:50:54,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-24 09:50:54,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:50:54,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/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 09:50:54,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304829579] [2021-10-24 09:50:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:50:54,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:50:54,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:50:54,840 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 09:50:54,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-24 09:50:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:50:55,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-24 09:50:55,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:50:55,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/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 09:50:55,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:50:55,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-24 09:50:55,681 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-24 09:50:55,681 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-24 09:50:55,686 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 09:50:55,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-24 09:50:55,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-24 09:50:55,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-24 09:50:55,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-24 09:50:55,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-24 09:50:55,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-24 09:50:56,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-24 09:50:56,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ffa968-a79f-41c0-b2d1-c0c0d47fb871/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:50:56,307 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-24 09:50:56,308 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 09:50:56,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 09:50:56 BasicIcfg [2021-10-24 09:50:56,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 09:50:56,333 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 09:50:56,333 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 09:50:56,334 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 09:50:56,334 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:42:04" (3/4) ... [2021-10-24 09:50:56,337 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 09:50:56,337 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 09:50:56,338 INFO L168 Benchmark]: Toolchain (without parser) took 534755.18 ms. Allocated memory was 60.8 MB in the beginning and 172.0 MB in the end (delta: 111.1 MB). Free memory was 38.3 MB in the beginning and 97.1 MB in the end (delta: -58.7 MB). Peak memory consumption was 52.3 MB. Max. memory is 16.1 GB. [2021-10-24 09:50:56,338 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 60.8 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:50:56,338 INFO L168 Benchmark]: CACSL2BoogieTranslator took 435.62 ms. Allocated memory is still 60.8 MB. Free memory was 38.2 MB in the beginning and 41.0 MB in the end (delta: -2.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 09:50:56,339 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.53 ms. Allocated memory is still 60.8 MB. Free memory was 40.8 MB in the beginning and 38.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 09:50:56,339 INFO L168 Benchmark]: Boogie Preprocessor took 60.39 ms. Allocated memory is still 60.8 MB. Free memory was 38.2 MB in the beginning and 35.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:50:56,340 INFO L168 Benchmark]: RCFGBuilder took 2115.49 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 35.9 MB in the beginning and 54.1 MB in the end (delta: -18.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. [2021-10-24 09:50:56,340 INFO L168 Benchmark]: TraceAbstraction took 532048.52 ms. Allocated memory was 79.7 MB in the beginning and 172.0 MB in the end (delta: 92.3 MB). Free memory was 53.7 MB in the beginning and 97.1 MB in the end (delta: -43.4 MB). Peak memory consumption was 118.2 MB. Max. memory is 16.1 GB. [2021-10-24 09:50:56,340 INFO L168 Benchmark]: Witness Printer took 3.63 ms. Allocated memory is still 172.0 MB. Free memory is still 97.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:50:56,343 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 60.8 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 435.62 ms. Allocated memory is still 60.8 MB. Free memory was 38.2 MB in the beginning and 41.0 MB in the end (delta: -2.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.53 ms. Allocated memory is still 60.8 MB. Free memory was 40.8 MB in the beginning and 38.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.39 ms. Allocated memory is still 60.8 MB. Free memory was 38.2 MB in the beginning and 35.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2115.49 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 35.9 MB in the beginning and 54.1 MB in the end (delta: -18.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 532048.52 ms. Allocated memory was 79.7 MB in the beginning and 172.0 MB in the end (delta: 92.3 MB). Free memory was 53.7 MB in the beginning and 97.1 MB in the end (delta: -43.4 MB). Peak memory consumption was 118.2 MB. Max. memory is 16.1 GB. * Witness Printer took 3.63 ms. Allocated memory is still 172.0 MB. Free memory is still 97.1 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: 26110.4ms, 214 PlacesBefore, 44 PlacesAfterwards, 223 TransitionsBefore, 38 TransitionsAfterwards, 1224 CoEnabledTransitionPairs, 7 FixpointIterations, 154 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 26 TrivialYvCompositions, 8 ConcurrentYvCompositions, 15 ChoiceCompositions, 226 TotalNumberOfCompositions, 2319 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1885, positive: 1807, positive conditional: 0, positive unconditional: 1807, negative: 78, negative conditional: 0, negative unconditional: 78, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 877, positive: 858, positive conditional: 0, positive unconditional: 858, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 877, positive: 856, positive conditional: 0, positive unconditional: 856, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 21, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 688, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 683, negative conditional: 0, negative unconditional: 683, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1885, positive: 949, positive conditional: 0, positive unconditional: 949, negative: 59, negative conditional: 0, negative unconditional: 59, unknown: 877, unknown conditional: 0, unknown unconditional: 877] , Statistics on independence cache: Total cache size (in pairs): 129, Positive cache size: 122, Positive conditional cache size: 0, Positive unconditional cache size: 122, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7 - 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: 127]: 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; [L101] 0 pthread_t t1, t2, t3, t4; [L103] 0 N = __VERIFIER_nondet_int() [L104] 0 n1 = __VERIFIER_nondet_int() [L105] 0 n2 = __VERIFIER_nondet_int() [L106] 0 q1_front = __VERIFIER_nondet_int() [L107] 0 q1_back = q1_front [L108] 0 q2_front = __VERIFIER_nondet_int() [L109] 0 q2_back = q2_front [L38] COND TRUE 0 !cond [L38] COND TRUE 0 !cond [L136] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L137] 0 int i = 0; [L137] COND TRUE 0 i < size [L138] 0 arr[i] = __VERIFIER_nondet_int() [L137] 0 i++ [L137] COND FALSE 0 !(i < size) [L140] 0 return arr; [L110] 0 q1 = create_fresh_int_array(n1) [L38] COND FALSE 0 !(!cond) [L38] COND TRUE 0 !cond [L136] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L137] 0 int i = 0; [L137] COND TRUE 0 i < size [L138] 0 arr[i] = __VERIFIER_nondet_int() [L137] 0 i++ [L140] 0 return arr; [L111] 0 q2 = create_fresh_int_array(n2) [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L136] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L137] 0 int i = 0; [L137] COND TRUE 0 i < size [L138] 0 arr[i] = __VERIFIER_nondet_int() [L137] 0 i++ [L137] COND FALSE 0 !(i < size) [L140] 0 return arr; [L112] 0 f = create_fresh_int_array(N) [L38] COND TRUE 0 !cond [L117] 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++ [L54] 1 i++ [L118] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) [L62] COND TRUE 2 j < N [L38] COND FALSE 2 !(!cond) [L65] 2 f[j] [L38] COND TRUE 2 !cond [L66] 2 q2[q2_back] [L66] 2 f[j] [L38] COND FALSE 2 !(!cond) [L38] COND FALSE 2 !(!cond) [L68] 2 q2_back++ [L69] 2 j++ [L62] COND FALSE 2 !(j < N) [L73] 2 return 0; [L119] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) [L77] COND TRUE 3 i < N || q1_front < q1_back [L38] COND FALSE 3 !(!cond) [L80] EXPR 3 q1[q1_front] [L38] COND TRUE 3 !cond [L38] COND TRUE 3 !cond [L146] 3 return a + b; [L80] 3 total = plus(total, q1[q1_front]) [L81] 3 q1_front++ [L77] COND FALSE 3 !(i < N || q1_front < q1_back) [L85] 3 return 0; [L58] 1 return 0; [L120] FCALL, FORK 0 pthread_create(&t4, 0, thread4, 0) [L89] COND TRUE 4 j < N || q2_front < q2_back [L38] COND TRUE 4 !cond [L92] EXPR 4 q2[q2_front] [L38] COND FALSE 4 !(!cond) [L38] COND TRUE 4 !cond [L146] 4 return a + b; [L92] 4 total = plus(total, q2[q2_front]) [L93] 4 q2_front++ [L97] 4 return 0; [L121] 0 \read(t1) [L121] FCALL, JOIN 1 pthread_join(t1, 0) [L122] 0 \read(t2) [L122] FCALL, JOIN 2 pthread_join(t2, 0) [L123] 0 \read(t3) [L123] FCALL, JOIN 3 pthread_join(t3, 0) [L124] 0 \read(t4) [L124] FCALL, JOIN 4 pthread_join(t4, 0) [L38] COND FALSE 0 !(!cond) [L127] 0 reach_error() - UnprovableResult [Line: 120]: 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: 118]: 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: 117]: 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: 119]: 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, 226 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 531873.6ms, OverallIterations: 13, TraceHistogramMax: 1, EmptinessCheckTime: 53.7ms, AutomataDifference: 3798.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26171.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 432 SDtfs, 1054 SDslu, 1343 SDs, 0 SdLazy, 681 SolverSat, 104 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2614.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1043 GetRequests, 945 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1728.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=712occurred in iteration=5, InterpolantAutomatonStates: 76, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 422.4ms AutomataMinimizationTime, 12 MinimizatonAttempts, 2468 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 422.3ms SsaConstructionTime, 2159.0ms SatisfiabilityAnalysisTime, 8299.2ms InterpolantComputationTime, 533 NumberOfCodeBlocks, 533 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1028 ConstructedInterpolants, 23 QuantifiedInterpolants, 5145 SizeOfPredicates, 102 NumberOfNonLiveVariables, 3203 ConjunctsInSsa, 150 ConjunctsInUnsatCore, 38 InterpolantComputations, 15 PerfectInterpolantSequences, 93/118 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...