./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs --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 6c2b9be04af52afd1b1337ce8d98441dda16f01d ............................................................................................................................................ 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_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs --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 6c2b9be04af52afd1b1337ce8d98441dda16f01d .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:29:57,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:29:57,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:29:57,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:29:57,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:29:57,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:29:57,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:29:57,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:29:57,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:29:57,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:29:57,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:29:57,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:29:57,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:29:57,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:29:57,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:29:57,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:29:57,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:29:57,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:29:57,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:29:57,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:29:57,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:29:57,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:29:57,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:29:57,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:29:57,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:29:57,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:29:57,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:29:57,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:29:57,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:29:57,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:29:57,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:29:57,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:29:57,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:29:57,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:29:57,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:29:57,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:29:57,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:29:57,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:29:57,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:29:57,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:29:57,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:29:57,836 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:29:57,884 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:29:57,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:29:57,888 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:29:57,888 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:29:57,889 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:29:57,889 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:29:57,889 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:29:57,889 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:29:57,896 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:29:57,897 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:29:57,898 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:29:57,898 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:29:57,899 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:29:57,899 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:29:57,899 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:29:57,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:29:57,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:29:57,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:29:57,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:29:57,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:29:57,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:29:57,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:29:57,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:29:57,910 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:29:57,910 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:29:57,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:29:57,911 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:29:57,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:29:57,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:29:57,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:29:57,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:29:57,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:29:57,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:29:57,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:29:57,915 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:29:57,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:29:57,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:29:57,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:29:57,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:29:57,917 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_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c2b9be04af52afd1b1337ce8d98441dda16f01d [2021-10-16 02:29:58,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:29:58,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:29:58,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:29:58,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:29:58,238 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:29:58,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2021-10-16 02:29:58,348 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/data/b1beb5111/ca9636c24d634abaa41738d6e6dbb6ef/FLAG9d9247bb4 [2021-10-16 02:29:58,816 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:29:58,816 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2021-10-16 02:29:58,824 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/data/b1beb5111/ca9636c24d634abaa41738d6e6dbb6ef/FLAG9d9247bb4 [2021-10-16 02:29:59,187 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/data/b1beb5111/ca9636c24d634abaa41738d6e6dbb6ef [2021-10-16 02:29:59,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:29:59,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:29:59,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:29:59,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:29:59,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:29:59,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:29:59" (1/1) ... [2021-10-16 02:29:59,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58093252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:59, skipping insertion in model container [2021-10-16 02:29:59,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:29:59" (1/1) ... [2021-10-16 02:29:59,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:29:59,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:29:59,442 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_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[3687,3700] [2021-10-16 02:29:59,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:29:59,470 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) [2021-10-16 02:29:59,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6cd64326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:59, skipping insertion in model container [2021-10-16 02:29:59,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:29:59,471 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-16 02:29:59,474 INFO L168 Benchmark]: Toolchain (without parser) took 280.36 ms. Allocated memory is still 107.0 MB. Free memory was 72.4 MB in the beginning and 83.8 MB in the end (delta: -11.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:29:59,475 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 81.8 MB. Free memory was 54.1 MB in the beginning and 54.1 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:29:59,476 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.12 ms. Allocated memory is still 107.0 MB. Free memory was 72.2 MB in the beginning and 83.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:29:59,478 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 81.8 MB. Free memory was 54.1 MB in the beginning and 54.1 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 264.12 ms. Allocated memory is still 107.0 MB. Free memory was 72.2 MB in the beginning and 83.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 140]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:30:01,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:30:01,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:30:01,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:30:01,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:30:01,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:30:01,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:30:01,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:30:01,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:30:01,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:30:01,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:30:01,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:30:01,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:30:01,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:30:01,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:30:01,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:30:01,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:30:01,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:30:01,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:30:02,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:30:02,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:30:02,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:30:02,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:30:02,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:30:02,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:30:02,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:30:02,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:30:02,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:30:02,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:30:02,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:30:02,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:30:02,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:30:02,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:30:02,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:30:02,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:30:02,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:30:02,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:30:02,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:30:02,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:30:02,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:30:02,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:30:02,040 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:30:02,074 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:30:02,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:30:02,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:30:02,076 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:30:02,076 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:30:02,076 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:30:02,077 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:30:02,077 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:30:02,077 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:30:02,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:30:02,079 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:30:02,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:30:02,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:30:02,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:30:02,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:30:02,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:30:02,081 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:30:02,081 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:30:02,081 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:30:02,081 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:30:02,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:30:02,082 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:30:02,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:30:02,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:30:02,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:30:02,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:30:02,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:30:02,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:30:02,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:30:02,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:30:02,083 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:30:02,084 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:30:02,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:30:02,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:30:02,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:30:02,085 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_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c2b9be04af52afd1b1337ce8d98441dda16f01d [2021-10-16 02:30:02,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:30:02,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:30:02,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:30:02,534 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:30:02,535 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:30:02,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2021-10-16 02:30:02,621 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/data/8fd29f788/e2a30d142d1a4c1e9616fa75c5ed6add/FLAGfcde30345 [2021-10-16 02:30:03,169 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:30:03,174 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2021-10-16 02:30:03,186 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/data/8fd29f788/e2a30d142d1a4c1e9616fa75c5ed6add/FLAGfcde30345 [2021-10-16 02:30:03,500 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/data/8fd29f788/e2a30d142d1a4c1e9616fa75c5ed6add [2021-10-16 02:30:03,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:30:03,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:30:03,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:30:03,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:30:03,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:30:03,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:30:03" (1/1) ... [2021-10-16 02:30:03,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@535989b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:03, skipping insertion in model container [2021-10-16 02:30:03,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:30:03" (1/1) ... [2021-10-16 02:30:03,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:30:03,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:30:03,793 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_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[3687,3700] [2021-10-16 02:30:03,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:30:03,871 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-16 02:30:03,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:30:03,942 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_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[3687,3700] [2021-10-16 02:30:03,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:30:03,964 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:30:04,012 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_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[3687,3700] [2021-10-16 02:30:04,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:30:04,056 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:30:04,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:04 WrapperNode [2021-10-16 02:30:04,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:30:04,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:30:04,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:30:04,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:30:04,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:04" (1/1) ... [2021-10-16 02:30:04,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:04" (1/1) ... [2021-10-16 02:30:04,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:30:04,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:30:04,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:30:04,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:30:04,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:04" (1/1) ... [2021-10-16 02:30:04,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:04" (1/1) ... [2021-10-16 02:30:04,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:04" (1/1) ... [2021-10-16 02:30:04,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:04" (1/1) ... [2021-10-16 02:30:04,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:04" (1/1) ... [2021-10-16 02:30:04,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:04" (1/1) ... [2021-10-16 02:30:04,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:04" (1/1) ... [2021-10-16 02:30:04,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:30:04,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:30:04,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:30:04,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:30:04,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:04" (1/1) ... [2021-10-16 02:30:04,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:30:04,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:30:04,299 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:30:04,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:30:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:30:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:30:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:30:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-16 02:30:04,362 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-16 02:30:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-16 02:30:04,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-16 02:30:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-16 02:30:04,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-16 02:30:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-16 02:30:04,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-16 02:30:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-16 02:30:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-16 02:30:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:30:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:30:04,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:30:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:30:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:30:04,367 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-16 02:30:06,520 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:30:06,520 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2021-10-16 02:30:06,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:30:06 BoogieIcfgContainer [2021-10-16 02:30:06,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:30:06,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:30:06,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:30:06,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:30:06,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:30:03" (1/3) ... [2021-10-16 02:30:06,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b1f6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:30:06, skipping insertion in model container [2021-10-16 02:30:06,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:04" (2/3) ... [2021-10-16 02:30:06,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b1f6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:30:06, skipping insertion in model container [2021-10-16 02:30:06,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:30:06" (3/3) ... [2021-10-16 02:30:06,532 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2021-10-16 02:30:06,538 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-16 02:30:06,538 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:30:06,538 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:30:06,538 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-16 02:30:06,582 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,583 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,583 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,583 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,583 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,584 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,584 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,584 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,584 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,585 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,585 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,585 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,585 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,586 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,586 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,586 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,587 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,587 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,587 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,587 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,588 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,588 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,588 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,588 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,589 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,589 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,589 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,589 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,590 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,590 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,590 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,590 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,591 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,591 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,592 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,592 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,592 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,592 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,593 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,593 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,593 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,593 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,594 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,594 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,594 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,594 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,594 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,594 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,595 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,595 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,595 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,596 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,596 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,596 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,596 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,596 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,597 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,597 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,598 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,598 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,598 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,598 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,598 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,599 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,599 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,599 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,599 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,599 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,600 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,600 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,600 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,600 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,601 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,601 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,601 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,601 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,601 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,601 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,602 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,602 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,602 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,602 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,605 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,606 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,606 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,606 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,606 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,606 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,607 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,607 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,607 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,607 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,607 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,607 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,610 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,610 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,611 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,611 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,611 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,611 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,611 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,611 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,613 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,613 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,614 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,614 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,614 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,614 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,614 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,614 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,615 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,615 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,615 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,615 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,617 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,618 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,618 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,618 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,618 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,618 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,618 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,619 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,619 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:06,628 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-16 02:30:06,678 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:30:06,685 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, mConcurrency=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 [2021-10-16 02:30:06,685 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-16 02:30:06,714 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-16 02:30:06,726 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 225 transitions, 482 flow [2021-10-16 02:30:06,729 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 225 transitions, 482 flow [2021-10-16 02:30:06,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 216 places, 225 transitions, 482 flow [2021-10-16 02:30:06,821 INFO L129 PetriNetUnfolder]: 22/221 cut-off events. [2021-10-16 02:30:06,821 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-16 02:30:06,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 221 events. 22/221 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 106 event pairs, 0 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 187. Up to 2 conditions per place. [2021-10-16 02:30:06,832 INFO L116 LiptonReduction]: Number of co-enabled transitions 1376 [2021-10-16 02:30:36,211 INFO L131 LiptonReduction]: Checked pairs total: 3508 [2021-10-16 02:30:36,211 INFO L133 LiptonReduction]: Total number of compositions: 224 [2021-10-16 02:30:36,228 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 40 transitions, 112 flow [2021-10-16 02:30:36,273 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 325 states, 324 states have (on average 4.021604938271605) internal successors, (1303), 324 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:36,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 325 states, 324 states have (on average 4.021604938271605) internal successors, (1303), 324 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 02:30:36,304 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:36,305 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] [2021-10-16 02:30:36,305 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)] === [2021-10-16 02:30:36,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:36,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1769164313, now seen corresponding path program 1 times [2021-10-16 02:30:36,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:30:36,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156301415] [2021-10-16 02:30:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:36,328 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:30:36,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:30:36,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:30:36,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:30:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:36,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:30:36,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:36,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:36,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:30:36,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156301415] [2021-10-16 02:30:36,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156301415] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:36,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:36,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-16 02:30:36,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480765753] [2021-10-16 02:30:36,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:30:36,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:30:36,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:30:36,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:30:36,985 INFO L87 Difference]: Start difference. First operand has 325 states, 324 states have (on average 4.021604938271605) internal successors, (1303), 324 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:37,083 INFO L93 Difference]: Finished difference Result 620 states and 2531 transitions. [2021-10-16 02:30:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:30:37,085 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 [2021-10-16 02:30:37,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:37,118 INFO L225 Difference]: With dead ends: 620 [2021-10-16 02:30:37,119 INFO L226 Difference]: Without dead ends: 591 [2021-10-16 02:30:37,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:30:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-10-16 02:30:37,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 441. [2021-10-16 02:30:37,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 4.054545454545455) internal successors, (1784), 440 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1784 transitions. [2021-10-16 02:30:37,230 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1784 transitions. Word has length 24 [2021-10-16 02:30:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:37,231 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1784 transitions. [2021-10-16 02:30:37,232 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) [2021-10-16 02:30:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1784 transitions. [2021-10-16 02:30:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:30:37,240 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:37,240 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] [2021-10-16 02:30:37,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:37,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:30:37,454 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)] === [2021-10-16 02:30:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2130306405, now seen corresponding path program 1 times [2021-10-16 02:30:37,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:30:37,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700029958] [2021-10-16 02:30:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:37,457 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:30:37,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:30:37,458 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:30:37,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:30:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:37,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:30:37,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:37,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:38,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:30:38,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700029958] [2021-10-16 02:30:38,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700029958] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:30:38,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [752265620] [2021-10-16 02:30:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:38,070 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:30:38,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:30:38,086 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:30:38,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-16 02:30:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:38,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:30:38,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:38,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:38,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [752265620] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:38,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-16 02:30:38,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3, 3] total 7 [2021-10-16 02:30:38,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088539971] [2021-10-16 02:30:38,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:30:38,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:30:38,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:30:38,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:30:38,732 INFO L87 Difference]: Start difference. First operand 441 states and 1784 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:38,903 INFO L93 Difference]: Finished difference Result 747 states and 2835 transitions. [2021-10-16 02:30:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:30:38,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-16 02:30:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:38,915 INFO L225 Difference]: With dead ends: 747 [2021-10-16 02:30:38,915 INFO L226 Difference]: Without dead ends: 655 [2021-10-16 02:30:38,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:30:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-10-16 02:30:38,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 583. [2021-10-16 02:30:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.922680412371134) internal successors, (2283), 582 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 2283 transitions. [2021-10-16 02:30:38,969 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 2283 transitions. Word has length 26 [2021-10-16 02:30:38,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:38,969 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 2283 transitions. [2021-10-16 02:30:38,970 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) [2021-10-16 02:30:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 2283 transitions. [2021-10-16 02:30:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:30:38,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:38,977 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] [2021-10-16 02:30:38,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:39,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:39,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:30:39,391 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)] === [2021-10-16 02:30:39,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:39,391 INFO L82 PathProgramCache]: Analyzing trace with hash 518714661, now seen corresponding path program 1 times [2021-10-16 02:30:39,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:30:39,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214125567] [2021-10-16 02:30:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:39,393 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:30:39,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:30:39,394 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:30:39,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:30:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:39,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:30:39,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:39,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:40,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:30:40,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214125567] [2021-10-16 02:30:40,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214125567] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:40,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:40,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:30:40,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411478024] [2021-10-16 02:30:40,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:30:40,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:30:40,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:30:40,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:30:40,156 INFO L87 Difference]: Start difference. First operand 583 states and 2283 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:40,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:40,419 INFO L93 Difference]: Finished difference Result 1111 states and 4063 transitions. [2021-10-16 02:30:40,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:30:40,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-16 02:30:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:40,435 INFO L225 Difference]: With dead ends: 1111 [2021-10-16 02:30:40,436 INFO L226 Difference]: Without dead ends: 1031 [2021-10-16 02:30:40,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:30:40,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-10-16 02:30:40,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 821. [2021-10-16 02:30:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.9097560975609755) internal successors, (3206), 820 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:40,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 3206 transitions. [2021-10-16 02:30:40,507 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 3206 transitions. Word has length 26 [2021-10-16 02:30:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:40,507 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 3206 transitions. [2021-10-16 02:30:40,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:40,508 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 3206 transitions. [2021-10-16 02:30:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:30:40,512 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:40,512 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] [2021-10-16 02:30:40,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:40,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:30:40,726 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)] === [2021-10-16 02:30:40,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:40,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2091274025, now seen corresponding path program 1 times [2021-10-16 02:30:40,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:30:40,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321482354] [2021-10-16 02:30:40,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:40,728 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:30:40,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:30:40,729 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:30:40,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:30:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:40,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:30:40,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:30:41,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:30:41,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:30:41,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321482354] [2021-10-16 02:30:41,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321482354] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:30:41,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1323631859] [2021-10-16 02:30:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:41,172 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:30:41,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:30:41,174 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:30:41,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 02:30:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:41,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:30:41,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:41,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:42,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1323631859] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:30:42,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987947124] [2021-10-16 02:30:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:42,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:30:42,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:30:42,420 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:30:42,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 02:30:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:42,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:30:42,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:43,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:43,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987947124] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:30:43,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:30:43,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5, 6, 5, 4] total 15 [2021-10-16 02:30:43,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387924699] [2021-10-16 02:30:43,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:30:43,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:30:43,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:30:43,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:30:43,397 INFO L87 Difference]: Start difference. First operand 821 states and 3206 transitions. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:44,432 INFO L93 Difference]: Finished difference Result 1727 states and 6270 transitions. [2021-10-16 02:30:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:30:44,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-16 02:30:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:44,454 INFO L225 Difference]: With dead ends: 1727 [2021-10-16 02:30:44,454 INFO L226 Difference]: Without dead ends: 1601 [2021-10-16 02:30:44,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-10-16 02:30:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-10-16 02:30:44,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 971. [2021-10-16 02:30:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 4.027835051546392) internal successors, (3907), 970 states have internal predecessors, (3907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 3907 transitions. [2021-10-16 02:30:44,537 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 3907 transitions. Word has length 27 [2021-10-16 02:30:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:44,538 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 3907 transitions. [2021-10-16 02:30:44,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 3907 transitions. [2021-10-16 02:30:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:30:44,544 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:44,544 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] [2021-10-16 02:30:44,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:44,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:44,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:45,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:30:45,162 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)] === [2021-10-16 02:30:45,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:45,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1362831437, now seen corresponding path program 1 times [2021-10-16 02:30:45,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:30:45,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752320579] [2021-10-16 02:30:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:45,164 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:30:45,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:30:45,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:30:45,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:30:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:45,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:30:45,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:30:45,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:30:45,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:30:45,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752320579] [2021-10-16 02:30:45,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752320579] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:45,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:45,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:30:45,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652288407] [2021-10-16 02:30:45,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:30:45,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:30:45,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:30:45,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:30:45,832 INFO L87 Difference]: Start difference. First operand 971 states and 3907 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:46,051 INFO L93 Difference]: Finished difference Result 1308 states and 4956 transitions. [2021-10-16 02:30:46,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:30:46,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-16 02:30:46,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:46,070 INFO L225 Difference]: With dead ends: 1308 [2021-10-16 02:30:46,071 INFO L226 Difference]: Without dead ends: 1232 [2021-10-16 02:30:46,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:30:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-10-16 02:30:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1056. [2021-10-16 02:30:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 3.9971563981042655) internal successors, (4217), 1055 states have internal predecessors, (4217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 4217 transitions. [2021-10-16 02:30:46,141 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 4217 transitions. Word has length 28 [2021-10-16 02:30:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:46,141 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 4217 transitions. [2021-10-16 02:30:46,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 4217 transitions. [2021-10-16 02:30:46,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 02:30:46,151 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:46,152 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] [2021-10-16 02:30:46,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:46,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:30:46,369 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)] === [2021-10-16 02:30:46,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:46,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1578232275, now seen corresponding path program 1 times [2021-10-16 02:30:46,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:30:46,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984507741] [2021-10-16 02:30:46,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:46,371 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:30:46,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:30:46,372 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:30:46,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:30:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:46,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:30:46,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:30:46,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:30:47,396 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:30:47,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984507741] [2021-10-16 02:30:47,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984507741] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:30:47,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:30:47,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-10-16 02:30:47,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133309500] [2021-10-16 02:30:47,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:30:47,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:30:47,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:30:47,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:30:47,399 INFO L87 Difference]: Start difference. First operand 1056 states and 4217 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:47,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:47,703 INFO L93 Difference]: Finished difference Result 1764 states and 6667 transitions. [2021-10-16 02:30:47,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:30:47,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-16 02:30:47,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:47,728 INFO L225 Difference]: With dead ends: 1764 [2021-10-16 02:30:47,729 INFO L226 Difference]: Without dead ends: 1689 [2021-10-16 02:30:47,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:30:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-10-16 02:30:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1059. [2021-10-16 02:30:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 3.9905482041587903) internal successors, (4222), 1058 states have internal predecessors, (4222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 4222 transitions. [2021-10-16 02:30:47,830 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 4222 transitions. Word has length 29 [2021-10-16 02:30:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:47,830 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 4222 transitions. [2021-10-16 02:30:47,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 4222 transitions. [2021-10-16 02:30:47,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 02:30:47,840 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:47,861 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] [2021-10-16 02:30:47,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:48,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:30:48,074 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)] === [2021-10-16 02:30:48,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:48,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1539160028, now seen corresponding path program 1 times [2021-10-16 02:30:48,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:30:48,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975864846] [2021-10-16 02:30:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:48,076 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:30:48,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:30:48,077 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:30:48,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:30:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:48,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:30:48,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:30:48,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:30:48,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:30:48,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975864846] [2021-10-16 02:30:48,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975864846] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:48,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:48,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 02:30:48,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369718012] [2021-10-16 02:30:48,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:30:48,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:30:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:30:48,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:30:48,934 INFO L87 Difference]: Start difference. First operand 1059 states and 4222 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:49,720 INFO L93 Difference]: Finished difference Result 2003 states and 6982 transitions. [2021-10-16 02:30:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:30:49,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-16 02:30:49,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:49,745 INFO L225 Difference]: With dead ends: 2003 [2021-10-16 02:30:49,746 INFO L226 Difference]: Without dead ends: 1647 [2021-10-16 02:30:49,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:30:49,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-10-16 02:30:49,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 953. [2021-10-16 02:30:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.813025210084034) internal successors, (3630), 952 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3630 transitions. [2021-10-16 02:30:49,862 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3630 transitions. Word has length 29 [2021-10-16 02:30:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:49,863 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 3630 transitions. [2021-10-16 02:30:49,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:49,863 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3630 transitions. [2021-10-16 02:30:49,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 02:30:49,869 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:49,869 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] [2021-10-16 02:30:49,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:50,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:30:50,082 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)] === [2021-10-16 02:30:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:50,082 INFO L82 PathProgramCache]: Analyzing trace with hash 508004774, now seen corresponding path program 2 times [2021-10-16 02:30:50,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:30:50,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33698237] [2021-10-16 02:30:50,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:30:50,084 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:30:50,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:30:50,085 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:30:50,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:30:50,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:30:50,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:30:50,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:30:50,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:30:51,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:30:51,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:30:51,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33698237] [2021-10-16 02:30:51,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33698237] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:51,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:51,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 02:30:51,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234208944] [2021-10-16 02:30:51,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:30:51,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:30:51,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:30:51,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:30:51,335 INFO L87 Difference]: Start difference. First operand 953 states and 3630 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:51,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:51,929 INFO L93 Difference]: Finished difference Result 1145 states and 4366 transitions. [2021-10-16 02:30:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:30:51,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-16 02:30:51,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:51,974 INFO L225 Difference]: With dead ends: 1145 [2021-10-16 02:30:51,974 INFO L226 Difference]: Without dead ends: 1077 [2021-10-16 02:30:51,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:30:51,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-10-16 02:30:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 677. [2021-10-16 02:30:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.7928994082840237) internal successors, (2564), 676 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:52,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2564 transitions. [2021-10-16 02:30:52,015 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2564 transitions. Word has length 29 [2021-10-16 02:30:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:52,015 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 2564 transitions. [2021-10-16 02:30:52,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2564 transitions. [2021-10-16 02:30:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-16 02:30:52,019 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:52,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:30:52,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:52,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:30:52,237 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)] === [2021-10-16 02:30:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:52,237 INFO L82 PathProgramCache]: Analyzing trace with hash 727179269, now seen corresponding path program 1 times [2021-10-16 02:30:52,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:30:52,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608933795] [2021-10-16 02:30:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:52,238 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:30:52,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:30:52,239 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:30:52,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:30:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:52,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:30:52,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:30:53,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:30:53,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:30:53,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608933795] [2021-10-16 02:30:53,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608933795] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:30:53,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1166666989] [2021-10-16 02:30:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:53,265 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:30:53,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:30:53,266 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:30:53,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-16 02:30:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:53,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:30:53,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:30:54,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:30:54,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1166666989] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:30:54,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116396894] [2021-10-16 02:30:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:54,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:30:54,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:30:54,295 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:30:54,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-16 02:30:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:54,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:30:54,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:30:55,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:30:55,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116396894] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:30:55,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:30:55,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 17 [2021-10-16 02:30:55,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376115618] [2021-10-16 02:30:55,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-16 02:30:55,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:30:55,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-16 02:30:55,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:30:55,215 INFO L87 Difference]: Start difference. First operand 677 states and 2564 transitions. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:56,519 INFO L93 Difference]: Finished difference Result 2663 states and 9736 transitions. [2021-10-16 02:30:56,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-16 02:30:56,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-16 02:30:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:56,549 INFO L225 Difference]: With dead ends: 2663 [2021-10-16 02:30:56,549 INFO L226 Difference]: Without dead ends: 2308 [2021-10-16 02:30:56,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 672.2ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-10-16 02:30:56,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-10-16 02:30:56,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 860. [2021-10-16 02:30:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.9871944121071015) internal successors, (3425), 859 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 3425 transitions. [2021-10-16 02:30:56,632 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 3425 transitions. Word has length 30 [2021-10-16 02:30:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:56,632 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 3425 transitions. [2021-10-16 02:30:56,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 3425 transitions. [2021-10-16 02:30:56,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-16 02:30:56,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:56,637 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] [2021-10-16 02:30:56,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:56,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:57,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-10-16 02:30:57,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:30:57,266 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)] === [2021-10-16 02:30:57,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:57,267 INFO L82 PathProgramCache]: Analyzing trace with hash -972997388, now seen corresponding path program 1 times [2021-10-16 02:30:57,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:30:57,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643002732] [2021-10-16 02:30:57,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:57,268 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:30:57,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:30:57,268 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:30:57,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 02:30:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:57,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:30:57,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:30:58,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:30:59,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:30:59,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643002732] [2021-10-16 02:30:59,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643002732] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:30:59,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:30:59,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-16 02:30:59,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719777510] [2021-10-16 02:30:59,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:30:59,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:30:59,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:30:59,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:30:59,106 INFO L87 Difference]: Start difference. First operand 860 states and 3425 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:59,799 INFO L93 Difference]: Finished difference Result 1114 states and 4511 transitions. [2021-10-16 02:30:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:30:59,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-16 02:30:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:59,818 INFO L225 Difference]: With dead ends: 1114 [2021-10-16 02:30:59,818 INFO L226 Difference]: Without dead ends: 1114 [2021-10-16 02:30:59,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:30:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-10-16 02:30:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 812. [2021-10-16 02:30:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.9889025893958077) internal successors, (3235), 811 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 3235 transitions. [2021-10-16 02:30:59,870 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 3235 transitions. Word has length 33 [2021-10-16 02:30:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:59,871 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 3235 transitions. [2021-10-16 02:30:59,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 3235 transitions. [2021-10-16 02:30:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-16 02:30:59,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:59,876 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] [2021-10-16 02:30:59,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:00,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:31:00,090 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)] === [2021-10-16 02:31:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:31:00,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1710378164, now seen corresponding path program 1 times [2021-10-16 02:31:00,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:31:00,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535783805] [2021-10-16 02:31:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:00,092 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:31:00,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:31:00,093 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:31:00,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 02:31:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:00,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:31:00,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:31:01,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:31:01,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:31:01,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535783805] [2021-10-16 02:31:01,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535783805] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:31:01,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [391445386] [2021-10-16 02:31:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:01,670 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:31:01,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:31:01,674 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:31:01,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-16 02:31:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:02,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:31:02,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:31:03,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:31:03,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [391445386] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:31:03,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660242767] [2021-10-16 02:31:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:03,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:31:03,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:31:03,413 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:31:03,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-16 02:31:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:04,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:31:04,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:31:04,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:31:04,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660242767] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:31:04,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:31:04,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-10-16 02:31:04,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168044729] [2021-10-16 02:31:04,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:31:04,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:31:04,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:31:04,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:31:04,832 INFO L87 Difference]: Start difference. First operand 812 states and 3235 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:05,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:31:05,265 INFO L93 Difference]: Finished difference Result 1946 states and 7937 transitions. [2021-10-16 02:31:05,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:31:05,268 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-16 02:31:05,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:31:05,284 INFO L225 Difference]: With dead ends: 1946 [2021-10-16 02:31:05,284 INFO L226 Difference]: Without dead ends: 1946 [2021-10-16 02:31:05,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 401.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:31:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-10-16 02:31:05,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1014. [2021-10-16 02:31:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 4.049358341559723) internal successors, (4102), 1013 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 4102 transitions. [2021-10-16 02:31:05,345 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 4102 transitions. Word has length 33 [2021-10-16 02:31:05,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:31:05,346 INFO L470 AbstractCegarLoop]: Abstraction has 1014 states and 4102 transitions. [2021-10-16 02:31:05,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 4102 transitions. [2021-10-16 02:31:05,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-16 02:31:05,351 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:31:05,351 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:31:05,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:05,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-10-16 02:31:05,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-16 02:31:05,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:31:05,970 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)] === [2021-10-16 02:31:05,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:31:05,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1130950898, now seen corresponding path program 1 times [2021-10-16 02:31:05,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:31:05,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181659165] [2021-10-16 02:31:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:05,971 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:31:05,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:31:05,972 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:31:05,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-16 02:31:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:09,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-16 02:31:09,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:09,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:09,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:09,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:09,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:09,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:10,211 INFO L354 Elim1Store]: treesize reduction 378, result has 13.5 percent of original size [2021-10-16 02:31:10,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 69 [2021-10-16 02:31:11,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:11,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:11,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:11,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:11,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:11,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:11,375 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-16 02:31:11,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 38 [2021-10-16 02:34:22,901 WARN L207 SmtUtils]: Spent 3.17 m on a formula simplification. DAG size of input: 375 DAG size of output: 106 [2021-10-16 02:34:22,904 INFO L354 Elim1Store]: treesize reduction 2187, result has 12.2 percent of original size [2021-10-16 02:34:22,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 121 treesize of output 346 [2021-10-16 02:36:45,144 WARN L207 SmtUtils]: Spent 1.51 m on a formula simplification. DAG size of input: 112 DAG size of output: 97 [2021-10-16 02:43:04,266 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-16 02:43:04,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:43:04,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181659165] [2021-10-16 02:43:04,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/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") [2021-10-16 02:43:04,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [512883749] [2021-10-16 02:43:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:04,269 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:43:04,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:43:04,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-16 02:43:04,274 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:43:04,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-16 02:43:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:06,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-16 02:43:06,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:06,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-16 02:43:06,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852455918] [2021-10-16 02:43:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:06,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:06,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:43:06,462 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:43:06,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-16 02:43:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:07,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-16 02:43:07,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:07,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-16 02:43:07,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:43:07,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 02:43:07,428 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 02:43:07,428 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 02:43:07,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:43:07,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-16 02:43:07,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-16 02:43:07,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-16 02:43:07,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-16 02:43:07,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:07,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:07,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:08,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ad1ea5-c330-4bab-a2cd-54f75a7da8b6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:08,041 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-16 02:43:08,041 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:43:08,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:43:08 BasicIcfg [2021-10-16 02:43:08,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:43:08,070 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:43:08,070 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:43:08,070 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:43:08,071 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:30:06" (3/4) ... [2021-10-16 02:43:08,084 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:43:08,084 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:43:08,085 INFO L168 Benchmark]: Toolchain (without parser) took 784581.10 ms. Allocated memory was 52.4 MB in the beginning and 230.7 MB in the end (delta: 178.3 MB). Free memory was 28.6 MB in the beginning and 138.3 MB in the end (delta: -109.7 MB). Peak memory consumption was 68.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:08,086 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 52.4 MB. Free memory was 33.4 MB in the beginning and 33.4 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:43:08,087 INFO L168 Benchmark]: CACSL2BoogieTranslator took 546.28 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 28.4 MB in the beginning and 43.7 MB in the end (delta: -15.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:08,087 INFO L168 Benchmark]: Boogie Procedure Inliner took 95.74 ms. Allocated memory is still 65.0 MB. Free memory was 43.7 MB in the beginning and 41.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:08,088 INFO L168 Benchmark]: Boogie Preprocessor took 95.97 ms. Allocated memory is still 65.0 MB. Free memory was 41.0 MB in the beginning and 38.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:08,088 INFO L168 Benchmark]: RCFGBuilder took 2270.81 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 38.6 MB in the beginning and 51.0 MB in the end (delta: -12.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:08,089 INFO L168 Benchmark]: TraceAbstraction took 781544.20 ms. Allocated memory was 79.7 MB in the beginning and 230.7 MB in the end (delta: 151.0 MB). Free memory was 50.1 MB in the beginning and 138.3 MB in the end (delta: -88.2 MB). Peak memory consumption was 170.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:08,089 INFO L168 Benchmark]: Witness Printer took 14.82 ms. Allocated memory is still 230.7 MB. Free memory is still 138.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:43:08,092 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 52.4 MB. Free memory was 33.4 MB in the beginning and 33.4 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 546.28 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 28.4 MB in the beginning and 43.7 MB in the end (delta: -15.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 95.74 ms. Allocated memory is still 65.0 MB. Free memory was 43.7 MB in the beginning and 41.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 95.97 ms. Allocated memory is still 65.0 MB. Free memory was 41.0 MB in the beginning and 38.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2270.81 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 38.6 MB in the beginning and 51.0 MB in the end (delta: -12.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 781544.20 ms. Allocated memory was 79.7 MB in the beginning and 230.7 MB in the end (delta: 151.0 MB). Free memory was 50.1 MB in the beginning and 138.3 MB in the end (delta: -88.2 MB). Peak memory consumption was 170.7 MB. Max. memory is 16.1 GB. * Witness Printer took 14.82 ms. Allocated memory is still 230.7 MB. Free memory is still 138.3 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: 29482.1ms, 216 PlacesBefore, 46 PlacesAfterwards, 225 TransitionsBefore, 40 TransitionsAfterwards, 1376 CoEnabledTransitionPairs, 8 FixpointIterations, 147 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 31 TrivialYvCompositions, 8 ConcurrentYvCompositions, 15 ChoiceCompositions, 224 TotalNumberOfCompositions, 3508 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2101, positive: 1965, positive conditional: 0, positive unconditional: 1965, negative: 136, negative conditional: 0, negative unconditional: 136, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 959, positive: 932, positive conditional: 0, positive unconditional: 932, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 959, positive: 929, positive conditional: 0, positive unconditional: 929, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 30, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1265, positive: 171, positive conditional: 0, positive unconditional: 171, negative: 1094, negative conditional: 0, negative unconditional: 1094, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2101, positive: 1033, positive conditional: 0, positive unconditional: 1033, negative: 109, negative conditional: 0, negative unconditional: 109, unknown: 959, unknown conditional: 0, unknown unconditional: 959] , Statistics on independence cache: Total cache size (in pairs): 139, Positive cache size: 127, Positive conditional cache size: 0, Positive unconditional cache size: 127, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 131]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L41] 0 int *q1, *q2, *f; [L42] 0 int q1_front, q1_back, q2_front, q2_back, i, j, n1, n2, N, total; [L105] 0 pthread_t t1, t2, t3, t4; [L107] 0 N = __VERIFIER_nondet_int() [L108] 0 n1 = __VERIFIER_nondet_int() [L109] 0 n2 = __VERIFIER_nondet_int() [L110] 0 q1_front = __VERIFIER_nondet_int() [L111] 0 q1_back = q1_front [L112] 0 q2_front = __VERIFIER_nondet_int() [L113] 0 q2_back = q2_front [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L140] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L141] 0 int i = 0; [L141] COND TRUE 0 i < size [L142] 0 arr[i] = __VERIFIER_nondet_int() [L141] 0 i++ [L141] COND FALSE 0 !(i < size) [L144] 0 return arr; [L114] 0 q1 = create_fresh_int_array(n1) [L38] COND TRUE 0 !cond [L38] COND FALSE 0 !(!cond) [L140] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L141] 0 int i = 0; [L141] COND TRUE 0 i < size [L142] 0 arr[i] = __VERIFIER_nondet_int() [L141] 0 i++ [L141] COND FALSE 0 !(i < size) [L144] 0 return arr; [L115] 0 q2 = create_fresh_int_array(n2) [L38] COND FALSE 0 !(!cond) [L38] COND TRUE 0 !cond [L140] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L141] 0 int i = 0; [L141] COND TRUE 0 i < size [L142] 0 arr[i] = __VERIFIER_nondet_int() [L141] 0 i++ [L141] COND FALSE 0 !(i < size) [L144] 0 return arr; [L116] 0 f = create_fresh_int_array(N) [L38] COND FALSE 0 !(!cond) [L121] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L48] COND TRUE 1 i < N [L38] COND TRUE 1 !cond [L51] 1 q1[q1_back] [L51] 1 f[i] [L38] COND TRUE 1 !cond [L38] COND FALSE 1 !(!cond) [L53] 1 q1_back++ [L122] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) [L64] COND TRUE 2 j < N [L38] COND TRUE 2 !cond [L67] 2 f[j] [L38] COND TRUE 2 !cond [L68] 2 q2[q2_back] [L68] 2 f[j] [L38] COND TRUE 2 !cond [L38] COND FALSE 2 !(!cond) [L70] 2 q2_back++ [L73] 2 j++ [L64] COND FALSE 2 !(j < N) [L77] 2 return 0; [L56] 1 i++ [L48] COND FALSE 1 !(i < N) [L60] 1 return 0; [L123] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) [L81] COND TRUE 3 i < N || q1_front < q1_back [L38] COND FALSE 3 !(!cond) [L84] EXPR 3 q1[q1_front] [L38] COND TRUE 3 !cond [L38] COND TRUE 3 !cond [L150] 3 return a + b; [L84] 3 total = plus(total, q1[q1_front]) [L85] 3 q1_front++ [L124] FCALL, FORK 0 pthread_create(&t4, 0, thread4, 0) [L125] 0 \read(t1) [L125] FCALL, JOIN 1 pthread_join(t1, 0) [L126] 0 \read(t2) [L126] FCALL, JOIN 2 pthread_join(t2, 0) [L127] 0 \read(t3) [L89] 3 return 0; [L127] FCALL, JOIN 3 pthread_join(t3, 0) [L128] 0 \read(t4) [L93] COND TRUE 4 j < N || q2_front < q2_back [L38] COND TRUE 4 !cond [L96] EXPR 4 q2[q2_front] [L38] COND TRUE 4 !cond [L38] COND TRUE 4 !cond [L150] 4 return a + b; [L96] 4 total = plus(total, q2[q2_front]) [L97] 4 q2_front++ [L93] COND FALSE 4 !(j < N || q2_front < q2_back) [L101] 4 return 0; [L128] FCALL, JOIN 4 pthread_join(t4, 0) [L38] COND FALSE 0 !(!cond) [L131] 0 reach_error() - UnprovableResult [Line: 122]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 121]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 123]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 124]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 230 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 781364.3ms, OverallIterations: 12, TraceHistogramMax: 1, EmptinessCheckTime: 96.1ms, AutomataDifference: 6208.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29588.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 446 SDtfs, 1431 SDslu, 1528 SDs, 0 SdLazy, 854 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4226.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1023 GetRequests, 921 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2605.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1059occurred in iteration=6, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 816.2ms AutomataMinimizationTime, 11 MinimizatonAttempts, 5644 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 454.6ms SsaConstructionTime, 2374.3ms SatisfiabilityAnalysisTime, 11306.3ms InterpolantComputationTime, 520 NumberOfCodeBlocks, 520 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 1004 ConstructedInterpolants, 30 QuantifiedInterpolants, 5525 SizeOfPredicates, 98 NumberOfNonLiveVariables, 3035 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 36 InterpolantComputations, 14 PerfectInterpolantSequences, 85/112 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...