./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.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_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/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_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/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_f7046250-2f84-4d9b-9c82-a90cb13a9193/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 47ce31104b9946da66b850f3990d7dc0a7e46191 ............................................................................................................................................ 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_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/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_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/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_f7046250-2f84-4d9b-9c82-a90cb13a9193/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 47ce31104b9946da66b850f3990d7dc0a7e46191 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:39:24,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:39:24,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:39:24,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:39:24,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:39:24,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:39:24,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:39:24,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:39:24,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:39:24,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:39:24,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:39:24,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:39:24,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:39:24,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:39:24,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:39:24,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:39:24,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:39:24,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:39:24,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:39:24,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:39:24,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:39:24,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:39:24,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:39:24,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:39:24,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:39:24,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:39:24,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:39:24,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:39:24,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:39:24,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:39:24,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:39:24,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:39:24,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:39:24,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:39:24,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:39:24,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:39:24,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:39:24,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:39:24,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:39:24,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:39:24,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:39:24,684 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:39:24,731 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:39:24,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:39:24,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:39:24,733 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:39:24,733 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:39:24,733 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:39:24,733 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:39:24,734 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:39:24,737 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:39:24,738 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:39:24,739 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:39:24,739 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:39:24,740 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:39:24,740 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:39:24,740 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:39:24,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:39:24,741 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:39:24,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:39:24,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:39:24,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:39:24,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:39:24,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:39:24,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:39:24,743 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:39:24,743 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:39:24,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:39:24,744 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:39:24,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:39:24,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:39:24,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:39:24,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:39:24,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:39:24,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:39:24,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:39:24,748 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:39:24,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:39:24,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:39:24,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:39:24,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:39:24,750 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_f7046250-2f84-4d9b-9c82-a90cb13a9193/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47ce31104b9946da66b850f3990d7dc0a7e46191 [2021-10-16 02:39:25,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:39:25,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:39:25,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:39:25,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:39:25,084 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:39:25,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-10-16 02:39:25,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/data/60c3a8137/f5a09df1f246427a9b0210a1f6f45975/FLAG5d9468d38 [2021-10-16 02:39:25,791 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:39:25,792 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-10-16 02:39:25,808 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/data/60c3a8137/f5a09df1f246427a9b0210a1f6f45975/FLAG5d9468d38 [2021-10-16 02:39:26,108 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/data/60c3a8137/f5a09df1f246427a9b0210a1f6f45975 [2021-10-16 02:39:26,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:39:26,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:39:26,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:39:26,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:39:26,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:39:26,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:39:26" (1/1) ... [2021-10-16 02:39:26,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63024ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:26, skipping insertion in model container [2021-10-16 02:39:26,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:39:26" (1/1) ... [2021-10-16 02:39:26,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:39:26,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:39:26,397 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_f7046250-2f84-4d9b-9c82-a90cb13a9193/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2423,2436] [2021-10-16 02:39:26,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:39:26,419 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 02:39:26,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b56a362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:26, skipping insertion in model container [2021-10-16 02:39:26,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:39:26,421 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-16 02:39:26,424 INFO L168 Benchmark]: Toolchain (without parser) took 309.38 ms. Allocated memory is still 104.9 MB. Free memory was 67.4 MB in the beginning and 81.3 MB in the end (delta: -13.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:39:26,425 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 104.9 MB. Free memory was 83.9 MB in the beginning and 83.9 MB in the end (delta: 60.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:39:26,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.66 ms. Allocated memory is still 104.9 MB. Free memory was 67.2 MB in the beginning and 81.3 MB in the end (delta: -14.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:39:26,429 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 104.9 MB. Free memory was 83.9 MB in the beginning and 83.9 MB in the end (delta: 60.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.66 ms. Allocated memory is still 104.9 MB. Free memory was 67.2 MB in the beginning and 81.3 MB in the end (delta: -14.0 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: 103]: 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 02:39:28,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:39:28,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:39:28,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:39:28,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:39:28,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:39:28,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:39:28,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:39:28,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:39:28,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:39:29,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:39:29,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:39:29,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:39:29,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:39:29,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:39:29,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:39:29,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:39:29,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:39:29,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:39:29,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:39:29,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:39:29,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:39:29,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:39:29,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:39:29,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:39:29,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:39:29,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:39:29,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:39:29,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:39:29,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:39:29,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:39:29,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:39:29,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:39:29,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:39:29,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:39:29,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:39:29,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:39:29,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:39:29,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:39:29,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:39:29,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:39:29,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:39:29,119 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:39:29,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:39:29,121 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:39:29,121 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:39:29,122 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:39:29,122 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:39:29,122 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:39:29,123 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:39:29,124 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:39:29,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:39:29,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:39:29,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:39:29,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:39:29,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:39:29,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:39:29,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:39:29,128 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:39:29,129 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:39:29,129 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:39:29,129 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:39:29,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:39:29,130 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:39:29,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:39:29,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:39:29,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:39:29,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:39:29,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:39:29,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:39:29,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:39:29,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:39:29,132 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:39:29,132 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:39:29,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:39:29,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:39:29,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:39:29,134 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_f7046250-2f84-4d9b-9c82-a90cb13a9193/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47ce31104b9946da66b850f3990d7dc0a7e46191 [2021-10-16 02:39:29,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:39:29,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:39:29,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:39:29,681 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:39:29,682 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:39:29,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-10-16 02:39:29,776 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/data/bb126fd4f/5828feacb9a54d049a5e5fee412d59b8/FLAGe0d969bf8 [2021-10-16 02:39:30,541 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:39:30,542 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-10-16 02:39:30,555 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/data/bb126fd4f/5828feacb9a54d049a5e5fee412d59b8/FLAGe0d969bf8 [2021-10-16 02:39:30,875 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/data/bb126fd4f/5828feacb9a54d049a5e5fee412d59b8 [2021-10-16 02:39:30,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:39:30,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:39:30,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:39:30,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:39:30,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:39:30,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:39:30" (1/1) ... [2021-10-16 02:39:30,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@752ca5a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:30, skipping insertion in model container [2021-10-16 02:39:30,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:39:30" (1/1) ... [2021-10-16 02:39:30,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:39:30,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:39:31,141 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_f7046250-2f84-4d9b-9c82-a90cb13a9193/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2423,2436] [2021-10-16 02:39:31,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:39:31,167 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-16 02:39:31,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:39:31,205 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_f7046250-2f84-4d9b-9c82-a90cb13a9193/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2423,2436] [2021-10-16 02:39:31,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:39:31,236 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:39:31,293 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_f7046250-2f84-4d9b-9c82-a90cb13a9193/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2423,2436] [2021-10-16 02:39:31,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:39:31,318 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:39:31,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:31 WrapperNode [2021-10-16 02:39:31,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:39:31,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:39:31,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:39:31,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:39:31,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:31" (1/1) ... [2021-10-16 02:39:31,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:31" (1/1) ... [2021-10-16 02:39:31,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:39:31,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:39:31,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:39:31,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:39:31,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:31" (1/1) ... [2021-10-16 02:39:31,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:31" (1/1) ... [2021-10-16 02:39:31,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:31" (1/1) ... [2021-10-16 02:39:31,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:31" (1/1) ... [2021-10-16 02:39:31,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:31" (1/1) ... [2021-10-16 02:39:31,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:31" (1/1) ... [2021-10-16 02:39:31,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:31" (1/1) ... [2021-10-16 02:39:31,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:39:31,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:39:31,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:39:31,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:39:31,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:31" (1/1) ... [2021-10-16 02:39:31,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:39:31,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:39:31,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:39:31,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:39:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:39:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:39:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:39:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-16 02:39:31,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-16 02:39:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-16 02:39:31,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-16 02:39:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-16 02:39:31,529 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-16 02:39:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:39:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:39:31,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:39:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:39:31,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:39:31,532 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 02:39:32,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:39:32,244 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-16 02:39:32,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:39:32 BoogieIcfgContainer [2021-10-16 02:39:32,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:39:32,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:39:32,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:39:32,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:39:32,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:39:30" (1/3) ... [2021-10-16 02:39:32,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6384d35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:39:32, skipping insertion in model container [2021-10-16 02:39:32,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:39:31" (2/3) ... [2021-10-16 02:39:32,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6384d35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:39:32, skipping insertion in model container [2021-10-16 02:39:32,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:39:32" (3/3) ... [2021-10-16 02:39:32,270 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2021-10-16 02:39:32,287 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-16 02:39:32,288 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:39:32,288 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:39:32,288 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-16 02:39:32,334 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,334 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,335 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,335 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,336 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,336 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,336 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,337 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,337 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,337 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,338 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,338 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,338 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,338 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,339 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,339 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,340 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,340 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,340 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,340 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,341 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,341 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,341 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,341 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,342 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,342 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,342 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,342 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,343 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,343 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,343 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,344 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,344 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,345 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,345 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,345 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,345 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,346 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,346 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,346 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,347 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,347 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,347 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,348 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,348 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,348 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,349 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,349 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,349 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,349 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,350 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,350 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,350 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,350 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,351 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,351 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,351 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,351 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,352 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,352 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,352 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,353 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,353 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,353 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,354 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,354 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,354 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,354 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,355 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,355 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,355 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,356 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,356 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,356 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,356 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,357 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,357 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,357 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,358 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,358 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,358 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,358 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,359 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,359 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,359 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,359 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,360 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,360 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,360 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,360 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,361 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,361 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,364 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,365 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,365 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,365 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,365 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,371 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,371 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,372 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,372 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,372 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,375 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,375 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,376 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,376 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,376 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:39:32,387 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-16 02:39:32,458 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:39:32,466 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 02:39:32,466 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-16 02:39:32,488 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-16 02:39:32,501 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 170 transitions, 364 flow [2021-10-16 02:39:32,505 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 170 transitions, 364 flow [2021-10-16 02:39:32,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 170 transitions, 364 flow [2021-10-16 02:39:32,621 INFO L129 PetriNetUnfolder]: 16/167 cut-off events. [2021-10-16 02:39:32,622 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-16 02:39:32,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 167 events. 16/167 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 124 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 128. Up to 3 conditions per place. [2021-10-16 02:39:32,635 INFO L116 LiptonReduction]: Number of co-enabled transitions 1936 [2021-10-16 02:39:51,104 INFO L131 LiptonReduction]: Checked pairs total: 3021 [2021-10-16 02:39:51,107 INFO L133 LiptonReduction]: Total number of compositions: 153 [2021-10-16 02:39:51,123 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 34 transitions, 92 flow [2021-10-16 02:39:51,164 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 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 02:39:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 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 02:39:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:39:51,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:39:51,186 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] [2021-10-16 02:39:51,187 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:39:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:39:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash -442512627, now seen corresponding path program 1 times [2021-10-16 02:39:51,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:39:51,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130565347] [2021-10-16 02:39:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:39:51,210 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:39:51,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:39:51,214 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:39:51,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:39:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:39:51,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:39:51,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:39:52,137 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 02:39:52,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:39:52,434 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 02:39:52,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:39:52,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130565347] [2021-10-16 02:39:52,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130565347] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:39:52,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:39:52,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-16 02:39:52,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727240249] [2021-10-16 02:39:52,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:39:52,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:39:52,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:39:52,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:39:52,462 INFO L87 Difference]: Start difference. First operand has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 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 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 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 02:39:52,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:39:52,831 INFO L93 Difference]: Finished difference Result 547 states and 1858 transitions. [2021-10-16 02:39:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:39:52,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:39:52,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:39:52,856 INFO L225 Difference]: With dead ends: 547 [2021-10-16 02:39:52,856 INFO L226 Difference]: Without dead ends: 524 [2021-10-16 02:39:52,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:39:52,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-10-16 02:39:52,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 328. [2021-10-16 02:39:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.458715596330275) internal successors, (1131), 327 states have internal predecessors, (1131), 0 states have call successors, (0), 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 02:39:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1131 transitions. [2021-10-16 02:39:52,992 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1131 transitions. Word has length 21 [2021-10-16 02:39:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:39:52,993 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1131 transitions. [2021-10-16 02:39:52,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 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 02:39:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1131 transitions. [2021-10-16 02:39:53,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:39:53,003 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:39:53,004 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:39:53,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:39:53,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:39:53,205 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:39:53,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:39:53,205 INFO L82 PathProgramCache]: Analyzing trace with hash -521645344, now seen corresponding path program 1 times [2021-10-16 02:39:53,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:39:53,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007177864] [2021-10-16 02:39:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:39:53,207 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:39:53,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:39:53,208 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:39:53,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:39:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:39:53,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:39:53,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:39:53,617 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 02:39:53,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:39:53,782 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 02:39:53,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:39:53,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007177864] [2021-10-16 02:39:53,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007177864] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:39:53,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:39:53,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-16 02:39:53,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14323265] [2021-10-16 02:39:53,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:39:53,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:39:53,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:39:53,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:39:53,787 INFO L87 Difference]: Start difference. First operand 328 states and 1131 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 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 02:39:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:39:54,339 INFO L93 Difference]: Finished difference Result 650 states and 2293 transitions. [2021-10-16 02:39:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:39:54,340 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:39:54,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:39:54,351 INFO L225 Difference]: With dead ends: 650 [2021-10-16 02:39:54,351 INFO L226 Difference]: Without dead ends: 648 [2021-10-16 02:39:54,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:39:54,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-10-16 02:39:54,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 408. [2021-10-16 02:39:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.533169533169533) internal successors, (1438), 407 states have internal predecessors, (1438), 0 states have call successors, (0), 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 02:39:54,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1438 transitions. [2021-10-16 02:39:54,420 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1438 transitions. Word has length 22 [2021-10-16 02:39:54,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:39:54,421 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1438 transitions. [2021-10-16 02:39:54,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 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 02:39:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1438 transitions. [2021-10-16 02:39:54,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:39:54,426 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:39:54,426 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:39:54,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:39:54,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:39:54,644 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:39:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:39:54,657 INFO L82 PathProgramCache]: Analyzing trace with hash 788418064, now seen corresponding path program 2 times [2021-10-16 02:39:54,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:39:54,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121106191] [2021-10-16 02:39:54,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:39:54,659 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:39:54,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:39:54,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:39:54,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:39:54,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:39:54,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:39:54,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:39:54,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:39:55,106 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 02:39:55,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:39:55,283 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 02:39:55,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:39:55,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121106191] [2021-10-16 02:39:55,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121106191] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:39:55,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:39:55,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-16 02:39:55,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412780214] [2021-10-16 02:39:55,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:39:55,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:39:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:39:55,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:39:55,286 INFO L87 Difference]: Start difference. First operand 408 states and 1438 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 02:39:55,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:39:55,880 INFO L93 Difference]: Finished difference Result 736 states and 2650 transitions. [2021-10-16 02:39:55,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:39:55,882 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:39:55,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:39:55,891 INFO L225 Difference]: With dead ends: 736 [2021-10-16 02:39:55,891 INFO L226 Difference]: Without dead ends: 646 [2021-10-16 02:39:55,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:39:55,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-10-16 02:39:55,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 422. [2021-10-16 02:39:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.7600950118764844) internal successors, (1583), 421 states have internal predecessors, (1583), 0 states have call successors, (0), 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 02:39:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1583 transitions. [2021-10-16 02:39:55,924 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1583 transitions. Word has length 22 [2021-10-16 02:39:55,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:39:55,925 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1583 transitions. [2021-10-16 02:39:55,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 02:39:55,925 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1583 transitions. [2021-10-16 02:39:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:39:55,928 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:39:55,928 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:39:55,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:39:56,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:39:56,144 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:39:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:39:56,144 INFO L82 PathProgramCache]: Analyzing trace with hash 480776770, now seen corresponding path program 3 times [2021-10-16 02:39:56,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:39:56,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110569087] [2021-10-16 02:39:56,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:39:56,145 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:39:56,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:39:56,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:39:56,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:39:56,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:39:56,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:39:56,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:39:56,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:39:56,730 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 02:39:56,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:39:57,148 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 02:39:57,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:39:57,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110569087] [2021-10-16 02:39:57,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110569087] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:39:57,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [416408036] [2021-10-16 02:39:57,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:39:57,150 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:39:57,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:39:57,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:39:57,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-16 02:39:57,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:39:57,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:39:57,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:39:57,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:39:57,951 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 02:39:57,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:39:58,149 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 02:39:58,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [416408036] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:39:58,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:39:58,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 5] total 14 [2021-10-16 02:39:58,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199516651] [2021-10-16 02:39:58,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:39:58,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:39:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:39:58,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:39:58,157 INFO L87 Difference]: Start difference. First operand 422 states and 1583 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:39:58,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:39:58,499 INFO L93 Difference]: Finished difference Result 640 states and 2432 transitions. [2021-10-16 02:39:58,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:39:58,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:39:58,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:39:58,508 INFO L225 Difference]: With dead ends: 640 [2021-10-16 02:39:58,509 INFO L226 Difference]: Without dead ends: 640 [2021-10-16 02:39:58,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:39:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-10-16 02:39:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 432. [2021-10-16 02:39:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.7749419953596286) internal successors, (1627), 431 states have internal predecessors, (1627), 0 states have call successors, (0), 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 02:39:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1627 transitions. [2021-10-16 02:39:58,539 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1627 transitions. Word has length 22 [2021-10-16 02:39:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:39:58,540 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1627 transitions. [2021-10-16 02:39:58,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:39:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1627 transitions. [2021-10-16 02:39:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:39:58,544 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:39:58,546 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:39:58,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:39:58,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-16 02:39:58,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:39:58,950 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:39:58,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:39:58,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1995613428, now seen corresponding path program 4 times [2021-10-16 02:39:58,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:39:58,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289427290] [2021-10-16 02:39:58,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:39:58,952 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:39:58,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:39:58,953 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:39:58,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:39:59,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:39:59,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:39:59,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:39:59,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:39:59,360 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 02:39:59,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:39:59,530 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 02:39:59,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:39:59,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289427290] [2021-10-16 02:39:59,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289427290] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:39:59,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:39:59,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-16 02:39:59,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772549439] [2021-10-16 02:39:59,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:39:59,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:39:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:39:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:39:59,533 INFO L87 Difference]: Start difference. First operand 432 states and 1627 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 02:40:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:00,109 INFO L93 Difference]: Finished difference Result 884 states and 3170 transitions. [2021-10-16 02:40:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 02:40:00,111 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:40:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:00,122 INFO L225 Difference]: With dead ends: 884 [2021-10-16 02:40:00,122 INFO L226 Difference]: Without dead ends: 884 [2021-10-16 02:40:00,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:40:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-10-16 02:40:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 502. [2021-10-16 02:40:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.7904191616766467) internal successors, (1899), 501 states have internal predecessors, (1899), 0 states have call successors, (0), 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 02:40:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1899 transitions. [2021-10-16 02:40:00,169 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1899 transitions. Word has length 22 [2021-10-16 02:40:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:00,169 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1899 transitions. [2021-10-16 02:40:00,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 02:40:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1899 transitions. [2021-10-16 02:40:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:40:00,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:00,173 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:00,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:00,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:00,391 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:00,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:00,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1607163002, now seen corresponding path program 5 times [2021-10-16 02:40:00,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:00,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922496869] [2021-10-16 02:40:00,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:40:00,392 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:00,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:00,393 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:00,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:40:00,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:40:00,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:00,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:40:00,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:00,749 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 02:40:00,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:00,832 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 02:40:00,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:00,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922496869] [2021-10-16 02:40:00,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922496869] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:00,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:40:00,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-16 02:40:00,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656235965] [2021-10-16 02:40:00,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:40:00,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:00,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:40:00,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:40:00,836 INFO L87 Difference]: Start difference. First operand 502 states and 1899 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:01,192 INFO L93 Difference]: Finished difference Result 744 states and 2767 transitions. [2021-10-16 02:40:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:40:01,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:40:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:01,202 INFO L225 Difference]: With dead ends: 744 [2021-10-16 02:40:01,202 INFO L226 Difference]: Without dead ends: 744 [2021-10-16 02:40:01,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:40:01,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-10-16 02:40:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 484. [2021-10-16 02:40:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.739130434782609) internal successors, (1806), 483 states have internal predecessors, (1806), 0 states have call successors, (0), 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 02:40:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1806 transitions. [2021-10-16 02:40:01,236 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1806 transitions. Word has length 22 [2021-10-16 02:40:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:01,237 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1806 transitions. [2021-10-16 02:40:01,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1806 transitions. [2021-10-16 02:40:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:40:01,240 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:01,240 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] [2021-10-16 02:40:01,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:01,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:01,455 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:01,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:01,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2142857330, now seen corresponding path program 6 times [2021-10-16 02:40:01,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:01,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857994165] [2021-10-16 02:40:01,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:40:01,456 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:01,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:01,457 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:01,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:40:01,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-16 02:40:01,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:01,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:40:01,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:01,918 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 02:40:01,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:02,025 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 02:40:02,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:02,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857994165] [2021-10-16 02:40:02,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857994165] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:02,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:40:02,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-16 02:40:02,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303011787] [2021-10-16 02:40:02,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:40:02,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:40:02,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:40:02,029 INFO L87 Difference]: Start difference. First operand 484 states and 1806 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 02:40:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:02,577 INFO L93 Difference]: Finished difference Result 796 states and 2906 transitions. [2021-10-16 02:40:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:40:02,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 22 [2021-10-16 02:40:02,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:02,589 INFO L225 Difference]: With dead ends: 796 [2021-10-16 02:40:02,589 INFO L226 Difference]: Without dead ends: 792 [2021-10-16 02:40:02,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:40:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-10-16 02:40:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 512. [2021-10-16 02:40:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 3.7455968688845402) internal successors, (1914), 511 states have internal predecessors, (1914), 0 states have call successors, (0), 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 02:40:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1914 transitions. [2021-10-16 02:40:02,636 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1914 transitions. Word has length 22 [2021-10-16 02:40:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:02,636 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1914 transitions. [2021-10-16 02:40:02,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 02:40:02,637 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1914 transitions. [2021-10-16 02:40:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:40:02,639 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:02,640 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:02,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:02,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:02,862 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:02,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:02,862 INFO L82 PathProgramCache]: Analyzing trace with hash -642361992, now seen corresponding path program 7 times [2021-10-16 02:40:02,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:02,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311857744] [2021-10-16 02:40:02,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:40:02,864 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:02,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:02,865 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:02,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:40:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:03,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:40:03,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:03,261 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 02:40:03,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:03,400 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 02:40:03,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:03,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311857744] [2021-10-16 02:40:03,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311857744] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:03,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:40:03,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-16 02:40:03,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846188887] [2021-10-16 02:40:03,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:40:03,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:03,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:40:03,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:40:03,403 INFO L87 Difference]: Start difference. First operand 512 states and 1914 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 02:40:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:04,016 INFO L93 Difference]: Finished difference Result 948 states and 3409 transitions. [2021-10-16 02:40:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:40:04,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 22 [2021-10-16 02:40:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:04,028 INFO L225 Difference]: With dead ends: 948 [2021-10-16 02:40:04,029 INFO L226 Difference]: Without dead ends: 946 [2021-10-16 02:40:04,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:40:04,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-10-16 02:40:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 548. [2021-10-16 02:40:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.8446069469835464) internal successors, (2103), 547 states have internal predecessors, (2103), 0 states have call successors, (0), 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 02:40:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 2103 transitions. [2021-10-16 02:40:04,065 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 2103 transitions. Word has length 22 [2021-10-16 02:40:04,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:04,066 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 2103 transitions. [2021-10-16 02:40:04,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 02:40:04,066 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 2103 transitions. [2021-10-16 02:40:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:40:04,069 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:04,069 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:04,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:04,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:04,283 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:04,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:04,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1207793532, now seen corresponding path program 8 times [2021-10-16 02:40:04,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:04,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742113956] [2021-10-16 02:40:04,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:40:04,285 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:04,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:04,286 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:04,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:40:04,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:40:04,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:04,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:40:04,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:04,810 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 02:40:04,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:05,136 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 02:40:05,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:05,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742113956] [2021-10-16 02:40:05,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742113956] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:40:05,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:40:05,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2021-10-16 02:40:05,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745184126] [2021-10-16 02:40:05,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:40:05,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:05,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:40:05,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:40:05,138 INFO L87 Difference]: Start difference. First operand 548 states and 2103 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:05,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:05,453 INFO L93 Difference]: Finished difference Result 1000 states and 3685 transitions. [2021-10-16 02:40:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:40:05,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:40:05,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:05,465 INFO L225 Difference]: With dead ends: 1000 [2021-10-16 02:40:05,465 INFO L226 Difference]: Without dead ends: 1000 [2021-10-16 02:40:05,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:40:05,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-10-16 02:40:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 620. [2021-10-16 02:40:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.827140549273021) internal successors, (2369), 619 states have internal predecessors, (2369), 0 states have call successors, (0), 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 02:40:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2369 transitions. [2021-10-16 02:40:05,518 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2369 transitions. Word has length 22 [2021-10-16 02:40:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:05,519 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 2369 transitions. [2021-10-16 02:40:05,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2369 transitions. [2021-10-16 02:40:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:40:05,522 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:05,522 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:05,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:05,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:05,736 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:05,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:05,737 INFO L82 PathProgramCache]: Analyzing trace with hash 684748975, now seen corresponding path program 1 times [2021-10-16 02:40:05,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:05,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074773321] [2021-10-16 02:40:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:05,737 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:05,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:05,738 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:05,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:40:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:05,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:40:05,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:06,077 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 02:40:06,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:06,166 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 02:40:06,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:06,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074773321] [2021-10-16 02:40:06,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074773321] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:06,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:40:06,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:40:06,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620918436] [2021-10-16 02:40:06,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:40:06,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:06,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:40:06,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:40:06,169 INFO L87 Difference]: Start difference. First operand 620 states and 2369 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 02:40:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:06,229 INFO L93 Difference]: Finished difference Result 710 states and 2474 transitions. [2021-10-16 02:40:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:40:06,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-16 02:40:06,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:06,236 INFO L225 Difference]: With dead ends: 710 [2021-10-16 02:40:06,236 INFO L226 Difference]: Without dead ends: 670 [2021-10-16 02:40:06,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:40:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-10-16 02:40:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 588. [2021-10-16 02:40:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.5144804088586032) internal successors, (2063), 587 states have internal predecessors, (2063), 0 states have call successors, (0), 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 02:40:06,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 2063 transitions. [2021-10-16 02:40:06,275 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 2063 transitions. Word has length 23 [2021-10-16 02:40:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:06,275 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 2063 transitions. [2021-10-16 02:40:06,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 02:40:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 2063 transitions. [2021-10-16 02:40:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:40:06,281 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:06,281 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:06,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:06,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:06,495 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:06,496 INFO L82 PathProgramCache]: Analyzing trace with hash -317342059, now seen corresponding path program 9 times [2021-10-16 02:40:06,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:06,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931452156] [2021-10-16 02:40:06,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:40:06,497 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:06,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:06,498 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:06,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:40:06,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:40:06,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:06,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:40:06,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:40:07,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:40:07,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:07,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931452156] [2021-10-16 02:40:07,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931452156] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:07,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1590422464] [2021-10-16 02:40:07,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:40:07,596 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:40:07,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:40:07,597 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:40:07,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-16 02:40:08,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:40:08,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:08,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:40:08,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:08,425 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 02:40:08,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:08,566 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 02:40:08,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1590422464] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:08,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-16 02:40:08,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 8] total 20 [2021-10-16 02:40:08,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303999041] [2021-10-16 02:40:08,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:40:08,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:08,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:40:08,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:40:08,567 INFO L87 Difference]: Start difference. First operand 588 states and 2063 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 02:40:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:08,917 INFO L93 Difference]: Finished difference Result 928 states and 3128 transitions. [2021-10-16 02:40:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:40:08,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 23 [2021-10-16 02:40:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:08,927 INFO L225 Difference]: With dead ends: 928 [2021-10-16 02:40:08,927 INFO L226 Difference]: Without dead ends: 902 [2021-10-16 02:40:08,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 424.8ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:40:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-10-16 02:40:08,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 758. [2021-10-16 02:40:08,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.4425363276089826) internal successors, (2606), 757 states have internal predecessors, (2606), 0 states have call successors, (0), 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 02:40:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2606 transitions. [2021-10-16 02:40:08,966 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2606 transitions. Word has length 23 [2021-10-16 02:40:08,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:08,967 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2606 transitions. [2021-10-16 02:40:08,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 02:40:08,967 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2606 transitions. [2021-10-16 02:40:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 02:40:08,970 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:08,970 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:08,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:09,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:09,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:09,374 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:09,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:09,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1447947773, now seen corresponding path program 1 times [2021-10-16 02:40:09,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:09,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218242741] [2021-10-16 02:40:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:09,375 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:09,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:09,377 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:09,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:40:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:09,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:40:09,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:40:09,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:40:10,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:10,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218242741] [2021-10-16 02:40:10,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218242741] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:40:10,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:40:10,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-10-16 02:40:10,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167113469] [2021-10-16 02:40:10,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:40:10,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:10,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:40:10,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:40:10,210 INFO L87 Difference]: Start difference. First operand 758 states and 2606 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 02:40:10,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:10,486 INFO L93 Difference]: Finished difference Result 866 states and 2897 transitions. [2021-10-16 02:40:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:40:10,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-16 02:40:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:10,494 INFO L225 Difference]: With dead ends: 866 [2021-10-16 02:40:10,494 INFO L226 Difference]: Without dead ends: 866 [2021-10-16 02:40:10,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:40:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-10-16 02:40:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 712. [2021-10-16 02:40:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.4444444444444446) internal successors, (2449), 711 states have internal predecessors, (2449), 0 states have call successors, (0), 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 02:40:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2449 transitions. [2021-10-16 02:40:10,531 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2449 transitions. Word has length 25 [2021-10-16 02:40:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:10,532 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 2449 transitions. [2021-10-16 02:40:10,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 02:40:10,532 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2449 transitions. [2021-10-16 02:40:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:40:10,535 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:10,535 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 02:40:10,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:10,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:10,750 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:10,750 INFO L82 PathProgramCache]: Analyzing trace with hash 899465372, now seen corresponding path program 1 times [2021-10-16 02:40:10,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:10,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11496561] [2021-10-16 02:40:10,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:10,751 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:10,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:10,752 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:10,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 02:40:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:11,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:40:11,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:11,220 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 02:40:11,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:11,334 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 02:40:11,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:11,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11496561] [2021-10-16 02:40:11,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11496561] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:11,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [745458445] [2021-10-16 02:40:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:11,335 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:40:11,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:40:11,336 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:40:11,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-16 02:40:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:11,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:40:11,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:11,974 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 02:40:11,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:12,114 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 02:40:12,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [745458445] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:12,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-16 02:40:12,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 13 [2021-10-16 02:40:12,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311887995] [2021-10-16 02:40:12,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:40:12,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:12,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:40:12,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:40:12,116 INFO L87 Difference]: Start difference. First operand 712 states and 2449 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 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 02:40:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:12,315 INFO L93 Difference]: Finished difference Result 580 states and 1985 transitions. [2021-10-16 02:40:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:40:12,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 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 02:40:12,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:12,321 INFO L225 Difference]: With dead ends: 580 [2021-10-16 02:40:12,321 INFO L226 Difference]: Without dead ends: 544 [2021-10-16 02:40:12,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:40:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-10-16 02:40:12,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-10-16 02:40:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.5138121546961325) internal successors, (1908), 543 states have internal predecessors, (1908), 0 states have call successors, (0), 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 02:40:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1908 transitions. [2021-10-16 02:40:12,368 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1908 transitions. Word has length 26 [2021-10-16 02:40:12,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:12,369 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 1908 transitions. [2021-10-16 02:40:12,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 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 02:40:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1908 transitions. [2021-10-16 02:40:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:40:12,372 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:12,372 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 02:40:12,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:12,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:12,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:12,790 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:12,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:12,790 INFO L82 PathProgramCache]: Analyzing trace with hash -77237445, now seen corresponding path program 1 times [2021-10-16 02:40:12,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:12,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302192791] [2021-10-16 02:40:12,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:12,791 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:12,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:12,793 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:12,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 02:40:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:13,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:40:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:40:13,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:40:13,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:13,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302192791] [2021-10-16 02:40:13,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302192791] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:13,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1874481630] [2021-10-16 02:40:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:13,716 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:40:13,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:40:13,717 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:40:13,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-16 02:40:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:14,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:40:14,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:40:14,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:40:14,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1874481630] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:14,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595717919] [2021-10-16 02:40:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:14,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:14,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:14,629 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:40:14,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-16 02:40:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:15,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:40:15,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:40:15,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:40:15,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595717919] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:15,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:40:15,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5, 5, 9, 8] total 26 [2021-10-16 02:40:15,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028349262] [2021-10-16 02:40:15,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-16 02:40:15,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:15,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-16 02:40:15,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:40:15,654 INFO L87 Difference]: Start difference. First operand 544 states and 1908 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 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 02:40:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:18,132 INFO L93 Difference]: Finished difference Result 1657 states and 5714 transitions. [2021-10-16 02:40:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-16 02:40:18,133 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 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 02:40:18,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:18,151 INFO L225 Difference]: With dead ends: 1657 [2021-10-16 02:40:18,151 INFO L226 Difference]: Without dead ends: 1635 [2021-10-16 02:40:18,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1613.0ms TimeCoverageRelationStatistics Valid=1061, Invalid=2971, Unknown=0, NotChecked=0, Total=4032 [2021-10-16 02:40:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-10-16 02:40:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 553. [2021-10-16 02:40:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 3.324275362318841) internal successors, (1835), 552 states have internal predecessors, (1835), 0 states have call successors, (0), 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 02:40:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1835 transitions. [2021-10-16 02:40:18,196 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1835 transitions. Word has length 27 [2021-10-16 02:40:18,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:18,196 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 1835 transitions. [2021-10-16 02:40:18,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 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 02:40:18,196 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1835 transitions. [2021-10-16 02:40:18,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 02:40:18,199 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:18,199 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 02:40:18,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:18,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-16 02:40:18,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:18,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:18,803 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:18,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:18,803 INFO L82 PathProgramCache]: Analyzing trace with hash -830970449, now seen corresponding path program 1 times [2021-10-16 02:40:18,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:18,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523826337] [2021-10-16 02:40:18,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:18,804 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:18,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:18,805 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:18,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 02:40:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:19,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:40:19,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:40:19,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:40:19,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:19,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523826337] [2021-10-16 02:40:19,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523826337] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:19,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [485479464] [2021-10-16 02:40:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:19,487 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:40:19,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:40:19,498 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:40:19,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-16 02:40:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:20,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:40:20,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:40:20,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:40:20,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [485479464] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:20,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619796966] [2021-10-16 02:40:20,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:20,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:20,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:20,312 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:40:20,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-16 02:40:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:20,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:40:20,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:40:20,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:40:20,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619796966] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:20,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:40:20,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-16 02:40:20,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338725281] [2021-10-16 02:40:20,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:40:20,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:40:20,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:40:20,998 INFO L87 Difference]: Start difference. First operand 553 states and 1835 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:21,159 INFO L93 Difference]: Finished difference Result 865 states and 2871 transitions. [2021-10-16 02:40:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:40:21,160 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-16 02:40:21,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:21,166 INFO L225 Difference]: With dead ends: 865 [2021-10-16 02:40:21,167 INFO L226 Difference]: Without dead ends: 783 [2021-10-16 02:40:21,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:40:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-10-16 02:40:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 583. [2021-10-16 02:40:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.276632302405498) internal successors, (1907), 582 states have internal predecessors, (1907), 0 states have call successors, (0), 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 02:40:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1907 transitions. [2021-10-16 02:40:21,199 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1907 transitions. Word has length 29 [2021-10-16 02:40:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:21,200 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1907 transitions. [2021-10-16 02:40:21,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1907 transitions. [2021-10-16 02:40:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 02:40:21,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:21,203 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 02:40:21,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:21,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-10-16 02:40:21,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:21,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:21,819 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:21,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:21,820 INFO L82 PathProgramCache]: Analyzing trace with hash -835593661, now seen corresponding path program 2 times [2021-10-16 02:40:21,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:21,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817315972] [2021-10-16 02:40:21,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:40:21,820 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:21,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:21,821 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:21,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-16 02:40:22,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:40:22,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:22,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:40:22,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:40:22,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:40:22,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:22,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817315972] [2021-10-16 02:40:22,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817315972] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:22,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [128763365] [2021-10-16 02:40:22,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:40:22,518 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:40:22,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:40:22,519 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:40:22,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-16 02:40:23,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:40:23,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:23,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:40:23,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:40:23,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:40:23,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [128763365] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:23,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548078818] [2021-10-16 02:40:23,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:40:23,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:23,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:23,469 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:40:23,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-16 02:40:24,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:40:24,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:24,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:40:24,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:40:24,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:40:24,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548078818] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:24,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:40:24,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-16 02:40:24,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262758126] [2021-10-16 02:40:24,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:40:24,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:24,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:40:24,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:40:24,232 INFO L87 Difference]: Start difference. First operand 583 states and 1907 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 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 02:40:24,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:24,406 INFO L93 Difference]: Finished difference Result 729 states and 2363 transitions. [2021-10-16 02:40:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:40:24,408 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 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 02:40:24,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:24,414 INFO L225 Difference]: With dead ends: 729 [2021-10-16 02:40:24,414 INFO L226 Difference]: Without dead ends: 546 [2021-10-16 02:40:24,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:40:24,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-10-16 02:40:24,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 456. [2021-10-16 02:40:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.3582417582417583) internal successors, (1528), 455 states have internal predecessors, (1528), 0 states have call successors, (0), 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 02:40:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1528 transitions. [2021-10-16 02:40:24,443 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1528 transitions. Word has length 29 [2021-10-16 02:40:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:24,444 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1528 transitions. [2021-10-16 02:40:24,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 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 02:40:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1528 transitions. [2021-10-16 02:40:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-16 02:40:24,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:24,447 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:24,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:24,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-16 02:40:24,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:25,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:40:25,064 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:25,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1234597756, now seen corresponding path program 3 times [2021-10-16 02:40:25,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:25,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884380052] [2021-10-16 02:40:25,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:40:25,065 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:25,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:25,066 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:25,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-16 02:40:25,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:40:25,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:25,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:40:25,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:25,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:26,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:26,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884380052] [2021-10-16 02:40:26,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884380052] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:26,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1944079391] [2021-10-16 02:40:26,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:40:26,351 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:40:26,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:40:26,359 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:40:26,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-16 02:40:27,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:40:27,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:27,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:40:27,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:27,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:27,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1944079391] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:27,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571862092] [2021-10-16 02:40:27,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:40:27,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:27,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:27,728 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:40:27,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-16 02:40:28,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:40:28,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:28,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:40:28,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-16 02:40:28,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-16 02:40:29,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571862092] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:29,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:40:29,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 8, 8] total 25 [2021-10-16 02:40:29,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44509677] [2021-10-16 02:40:29,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-16 02:40:29,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:29,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-16 02:40:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:40:29,203 INFO L87 Difference]: Start difference. First operand 456 states and 1528 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 25 states have internal predecessors, (106), 0 states have call successors, (0), 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 02:40:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:31,140 INFO L93 Difference]: Finished difference Result 1238 states and 4276 transitions. [2021-10-16 02:40:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-16 02:40:31,141 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 25 states have internal predecessors, (106), 0 states have call successors, (0), 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 34 [2021-10-16 02:40:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:31,153 INFO L225 Difference]: With dead ends: 1238 [2021-10-16 02:40:31,153 INFO L226 Difference]: Without dead ends: 1238 [2021-10-16 02:40:31,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1246.1ms TimeCoverageRelationStatistics Valid=502, Invalid=1660, Unknown=0, NotChecked=0, Total=2162 [2021-10-16 02:40:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-10-16 02:40:31,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 772. [2021-10-16 02:40:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.498054474708171) internal successors, (2697), 771 states have internal predecessors, (2697), 0 states have call successors, (0), 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 02:40:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2697 transitions. [2021-10-16 02:40:31,187 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2697 transitions. Word has length 34 [2021-10-16 02:40:31,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:31,187 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2697 transitions. [2021-10-16 02:40:31,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 25 states have internal predecessors, (106), 0 states have call successors, (0), 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 02:40:31,188 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2697 transitions. [2021-10-16 02:40:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-16 02:40:31,191 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:31,192 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:31,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:31,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-16 02:40:31,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-16 02:40:31,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:31,797 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:31,797 INFO L82 PathProgramCache]: Analyzing trace with hash -483684601, now seen corresponding path program 4 times [2021-10-16 02:40:31,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:31,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403523951] [2021-10-16 02:40:31,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:40:31,798 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:31,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:31,799 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:31,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-16 02:40:32,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:40:32,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:32,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:40:32,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:32,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:32,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:32,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403523951] [2021-10-16 02:40:32,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403523951] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:32,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1610834033] [2021-10-16 02:40:32,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:40:32,871 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:40:32,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:40:32,871 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:40:32,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-10-16 02:40:33,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:40:33,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:33,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:40:33,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:33,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:34,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1610834033] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:34,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333894487] [2021-10-16 02:40:34,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:40:34,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:34,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:34,019 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:40:34,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-16 02:40:34,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:40:34,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:40:34,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:34,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:34,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333894487] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:34,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:40:34,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-10-16 02:40:34,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471594573] [2021-10-16 02:40:35,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:40:35,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:35,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:40:35,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:40:35,001 INFO L87 Difference]: Start difference. First operand 772 states and 2697 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 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 02:40:35,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:35,436 INFO L93 Difference]: Finished difference Result 1208 states and 4163 transitions. [2021-10-16 02:40:35,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:40:35,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 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 37 [2021-10-16 02:40:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:35,452 INFO L225 Difference]: With dead ends: 1208 [2021-10-16 02:40:35,452 INFO L226 Difference]: Without dead ends: 1156 [2021-10-16 02:40:35,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:40:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-10-16 02:40:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 916. [2021-10-16 02:40:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.4852459016393444) internal successors, (3189), 915 states have internal predecessors, (3189), 0 states have call successors, (0), 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 02:40:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3189 transitions. [2021-10-16 02:40:35,494 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3189 transitions. Word has length 37 [2021-10-16 02:40:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:35,494 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 3189 transitions. [2021-10-16 02:40:35,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 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 02:40:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3189 transitions. [2021-10-16 02:40:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-16 02:40:35,501 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:35,501 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:35,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:35,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-10-16 02:40:35,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-16 02:40:36,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:36,117 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:40:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:36,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1561102937, now seen corresponding path program 5 times [2021-10-16 02:40:36,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:36,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340898919] [2021-10-16 02:40:36,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:40:36,119 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:36,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:36,120 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:36,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-16 02:40:36,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-16 02:40:36,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:36,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:40:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:37,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:37,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:37,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340898919] [2021-10-16 02:40:37,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340898919] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:37,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [979258466] [2021-10-16 02:40:37,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:40:37,769 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:40:37,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:40:37,770 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:40:37,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-10-16 02:40:50,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-16 02:40:50,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:50,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:40:50,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:51,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-16 02:40:51,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [979258466] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:51,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448254827] [2021-10-16 02:40:51,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:40:51,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:51,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:51,815 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:40:51,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-16 02:40:56,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-16 02:40:56,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:40:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:40:56,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:57,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:40:57,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448254827] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:57,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:40:57,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 7, 7, 7] total 36 [2021-10-16 02:40:57,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716044659] [2021-10-16 02:40:57,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-16 02:40:57,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:57,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-16 02:40:57,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-10-16 02:40:57,362 INFO L87 Difference]: Start difference. First operand 916 states and 3189 transitions. Second operand has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 36 states have internal predecessors, (140), 0 states have call successors, (0), 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 02:41:13,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:41:13,333 INFO L93 Difference]: Finished difference Result 4500 states and 16561 transitions. [2021-10-16 02:41:13,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-10-16 02:41:13,334 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 36 states have internal predecessors, (140), 0 states have call successors, (0), 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 37 [2021-10-16 02:41:13,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:41:13,353 INFO L225 Difference]: With dead ends: 4500 [2021-10-16 02:41:13,353 INFO L226 Difference]: Without dead ends: 4382 [2021-10-16 02:41:13,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6779 ImplicationChecksByTransitivity, 11433.6ms TimeCoverageRelationStatistics Valid=2258, Invalid=17202, Unknown=0, NotChecked=0, Total=19460 [2021-10-16 02:41:13,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-10-16 02:41:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 1966. [2021-10-16 02:41:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 3.8030534351145038) internal successors, (7473), 1965 states have internal predecessors, (7473), 0 states have call successors, (0), 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 02:41:13,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 7473 transitions. [2021-10-16 02:41:13,472 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 7473 transitions. Word has length 37 [2021-10-16 02:41:13,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:41:13,473 INFO L470 AbstractCegarLoop]: Abstraction has 1966 states and 7473 transitions. [2021-10-16 02:41:13,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 36 states have internal predecessors, (140), 0 states have call successors, (0), 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 02:41:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 7473 transitions. [2021-10-16 02:41:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-16 02:41:13,480 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:41:13,481 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:41:13,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:13,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-10-16 02:41:13,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-16 02:41:14,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:14,090 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:41:14,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:41:14,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1342717365, now seen corresponding path program 6 times [2021-10-16 02:41:14,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:41:14,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751229023] [2021-10-16 02:41:14,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:41:14,091 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:41:14,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:41:14,092 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:41:14,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-16 02:41:14,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-16 02:41:14,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:41:15,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:41:15,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:41:15,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:41:15,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:41:15,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751229023] [2021-10-16 02:41:15,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751229023] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:15,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [290759114] [2021-10-16 02:41:15,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:41:15,382 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:41:15,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:41:15,384 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:41:15,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-10-16 02:41:16,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-16 02:41:16,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:41:16,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:41:16,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:41:16,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:41:16,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [290759114] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:16,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517939056] [2021-10-16 02:41:16,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:41:16,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:16,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:41:16,875 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:41:16,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-16 02:41:17,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-16 02:41:17,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:41:17,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:41:17,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:41:18,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:41:18,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517939056] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:18,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:41:18,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-10-16 02:41:18,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099586183] [2021-10-16 02:41:18,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:41:18,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:41:18,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:41:18,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:41:18,133 INFO L87 Difference]: Start difference. First operand 1966 states and 7473 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:18,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:41:18,876 INFO L93 Difference]: Finished difference Result 2668 states and 9845 transitions. [2021-10-16 02:41:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 02:41:18,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-16 02:41:18,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:41:18,887 INFO L225 Difference]: With dead ends: 2668 [2021-10-16 02:41:18,888 INFO L226 Difference]: Without dead ends: 2592 [2021-10-16 02:41:18,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:41:18,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-10-16 02:41:18,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2080. [2021-10-16 02:41:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 3.775853775853776) internal successors, (7850), 2079 states have internal predecessors, (7850), 0 states have call successors, (0), 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 02:41:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 7850 transitions. [2021-10-16 02:41:18,975 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 7850 transitions. Word has length 37 [2021-10-16 02:41:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:41:18,976 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 7850 transitions. [2021-10-16 02:41:18,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:18,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 7850 transitions. [2021-10-16 02:41:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-16 02:41:18,984 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:41:18,984 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:41:19,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:19,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-10-16 02:41:19,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-16 02:41:19,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:19,602 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:41:19,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:41:19,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1435432906, now seen corresponding path program 7 times [2021-10-16 02:41:19,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:41:19,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218549168] [2021-10-16 02:41:19,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:41:19,603 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:41:19,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:41:19,605 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:41:19,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-16 02:41:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:20,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:41:20,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 02:41:20,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 02:41:21,585 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:41:21,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218549168] [2021-10-16 02:41:21,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218549168] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:21,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1562977052] [2021-10-16 02:41:21,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:41:21,586 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:41:21,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:41:21,591 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:41:21,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-10-16 02:41:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:22,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:41:22,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 02:41:23,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 02:41:23,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1562977052] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:23,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245049024] [2021-10-16 02:41:23,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:41:23,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:23,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:41:23,503 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:41:23,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-16 02:41:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:24,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:41:24,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:41:25,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-16 02:41:25,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245049024] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:25,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:41:25,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 14, 6] total 39 [2021-10-16 02:41:25,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131521075] [2021-10-16 02:41:25,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-16 02:41:25,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:41:25,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-16 02:41:25,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2021-10-16 02:41:25,688 INFO L87 Difference]: Start difference. First operand 2080 states and 7850 transitions. Second operand has 39 states, 39 states have (on average 3.7948717948717947) internal successors, (148), 39 states have internal predecessors, (148), 0 states have call successors, (0), 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 02:43:02,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:02,480 INFO L93 Difference]: Finished difference Result 11140 states and 38411 transitions. [2021-10-16 02:43:02,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-10-16 02:43:02,482 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.7948717948717947) internal successors, (148), 39 states have internal predecessors, (148), 0 states have call successors, (0), 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 40 [2021-10-16 02:43:02,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:02,528 INFO L225 Difference]: With dead ends: 11140 [2021-10-16 02:43:02,528 INFO L226 Difference]: Without dead ends: 10282 [2021-10-16 02:43:02,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52115 ImplicationChecksByTransitivity, 86254.6ms TimeCoverageRelationStatistics Valid=14433, Invalid=114089, Unknown=0, NotChecked=0, Total=128522 [2021-10-16 02:43:02,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10282 states. [2021-10-16 02:43:02,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10282 to 3460. [2021-10-16 02:43:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 3459 states have (on average 3.7947383636889276) internal successors, (13126), 3459 states have internal predecessors, (13126), 0 states have call successors, (0), 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 02:43:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 13126 transitions. [2021-10-16 02:43:02,804 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 13126 transitions. Word has length 40 [2021-10-16 02:43:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:02,804 INFO L470 AbstractCegarLoop]: Abstraction has 3460 states and 13126 transitions. [2021-10-16 02:43:02,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.7948717948717947) internal successors, (148), 39 states have internal predecessors, (148), 0 states have call successors, (0), 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 02:43:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 13126 transitions. [2021-10-16 02:43:02,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-16 02:43:02,816 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:02,816 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:43:02,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:03,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-16 02:43:03,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2021-10-16 02:43:03,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:43:03,432 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:43:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:03,432 INFO L82 PathProgramCache]: Analyzing trace with hash 247716386, now seen corresponding path program 8 times [2021-10-16 02:43:03,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:43:03,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849184130] [2021-10-16 02:43:03,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:43:03,433 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:43:03,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:43:03,434 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:43:03,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-16 02:43:04,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:43:04,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:04,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-16 02:43:04,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 02:43:05,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 02:43:06,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:43:06,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849184130] [2021-10-16 02:43:06,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849184130] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:06,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1827385395] [2021-10-16 02:43:06,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:43:06,979 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:43:06,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:43:06,979 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:43:06,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-10-16 02:43:08,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:43:08,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:08,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:43:08,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:43:08,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:43:09,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1827385395] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:09,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672636922] [2021-10-16 02:43:09,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:43:09,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:09,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:43:09,602 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:43:09,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-16 02:43:10,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:43:10,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:10,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 02:43:10,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:43:11,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-16 02:43:12,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672636922] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:12,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:43:12,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9, 9, 13, 7] total 51 [2021-10-16 02:43:12,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831058874] [2021-10-16 02:43:12,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-16 02:43:12,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:43:12,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-16 02:43:12,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=2066, Unknown=0, NotChecked=0, Total=2550 [2021-10-16 02:43:12,063 INFO L87 Difference]: Start difference. First operand 3460 states and 13126 transitions. Second operand has 51 states, 51 states have (on average 3.764705882352941) internal successors, (192), 51 states have internal predecessors, (192), 0 states have call successors, (0), 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 02:43:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:38,483 INFO L93 Difference]: Finished difference Result 17785 states and 65571 transitions. [2021-10-16 02:43:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-10-16 02:43:38,484 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.764705882352941) internal successors, (192), 51 states have internal predecessors, (192), 0 states have call successors, (0), 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 42 [2021-10-16 02:43:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:38,570 INFO L225 Difference]: With dead ends: 17785 [2021-10-16 02:43:38,571 INFO L226 Difference]: Without dead ends: 16821 [2021-10-16 02:43:38,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14574 ImplicationChecksByTransitivity, 22922.6ms TimeCoverageRelationStatistics Valid=7408, Invalid=34004, Unknown=0, NotChecked=0, Total=41412 [2021-10-16 02:43:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16821 states. [2021-10-16 02:43:38,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16821 to 6427. [2021-10-16 02:43:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6427 states, 6426 states have (on average 3.6864301276065983) internal successors, (23689), 6426 states have internal predecessors, (23689), 0 states have call successors, (0), 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 02:43:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6427 states to 6427 states and 23689 transitions. [2021-10-16 02:43:38,999 INFO L78 Accepts]: Start accepts. Automaton has 6427 states and 23689 transitions. Word has length 42 [2021-10-16 02:43:38,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:38,999 INFO L470 AbstractCegarLoop]: Abstraction has 6427 states and 23689 transitions. [2021-10-16 02:43:38,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.764705882352941) internal successors, (192), 51 states have internal predecessors, (192), 0 states have call successors, (0), 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 02:43:38,999 INFO L276 IsEmpty]: Start isEmpty. Operand 6427 states and 23689 transitions. [2021-10-16 02:43:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-16 02:43:39,020 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:39,020 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:43:39,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:39,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-16 02:43:39,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:39,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:43:39,627 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:43:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:39,627 INFO L82 PathProgramCache]: Analyzing trace with hash 156496880, now seen corresponding path program 9 times [2021-10-16 02:43:39,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:43:39,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058724420] [2021-10-16 02:43:39,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:43:39,628 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:43:39,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:43:39,629 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:43:39,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-16 02:43:40,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:43:40,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:43:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-16 02:43:41,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-16 02:43:42,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:43:42,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058724420] [2021-10-16 02:43:42,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058724420] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:42,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1779772968] [2021-10-16 02:43:42,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:43:42,036 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:43:42,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:43:42,038 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:43:42,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-10-16 02:43:43,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:43:43,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:43,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:43:43,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-16 02:43:44,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-16 02:43:44,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1779772968] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:44,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958204414] [2021-10-16 02:43:44,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:43:44,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:43:44,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:43:44,817 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:43:44,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-16 02:43:46,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:43:46,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:46,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:43:46,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-16 02:43:46,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-16 02:43:48,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958204414] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:48,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:43:48,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8, 8, 12, 12] total 44 [2021-10-16 02:43:48,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74123800] [2021-10-16 02:43:48,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-16 02:43:48,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:43:48,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-16 02:43:48,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-10-16 02:43:48,194 INFO L87 Difference]: Start difference. First operand 6427 states and 23689 transitions. Second operand has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 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 02:43:56,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:56,675 INFO L93 Difference]: Finished difference Result 16491 states and 62269 transitions. [2021-10-16 02:43:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-16 02:43:56,676 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 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 44 [2021-10-16 02:43:56,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:56,722 INFO L225 Difference]: With dead ends: 16491 [2021-10-16 02:43:56,722 INFO L226 Difference]: Without dead ends: 16491 [2021-10-16 02:43:56,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 6079.8ms TimeCoverageRelationStatistics Valid=1388, Invalid=6094, Unknown=0, NotChecked=0, Total=7482 [2021-10-16 02:43:56,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16491 states. [2021-10-16 02:43:57,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16491 to 8871. [2021-10-16 02:43:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8871 states, 8870 states have (on average 3.783652762119504) internal successors, (33561), 8870 states have internal predecessors, (33561), 0 states have call successors, (0), 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 02:43:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8871 states to 8871 states and 33561 transitions. [2021-10-16 02:43:57,069 INFO L78 Accepts]: Start accepts. Automaton has 8871 states and 33561 transitions. Word has length 44 [2021-10-16 02:43:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:57,070 INFO L470 AbstractCegarLoop]: Abstraction has 8871 states and 33561 transitions. [2021-10-16 02:43:57,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 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 02:43:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 8871 states and 33561 transitions. [2021-10-16 02:43:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-16 02:43:57,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:57,099 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:43:57,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:57,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:57,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:57,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:43:57,719 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:43:57,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:57,720 INFO L82 PathProgramCache]: Analyzing trace with hash 643400127, now seen corresponding path program 10 times [2021-10-16 02:43:57,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:43:57,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175860273] [2021-10-16 02:43:57,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:43:57,720 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:43:57,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:43:57,721 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:43:57,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-16 02:43:59,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:43:59,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:43:59,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:43:59,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 02:43:59,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 02:43:59,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:43:59,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175860273] [2021-10-16 02:43:59,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175860273] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:43:59,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1694269117] [2021-10-16 02:43:59,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:43:59,409 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:43:59,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:43:59,410 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:43:59,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-10-16 02:44:00,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:44:00,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:44:00,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:44:00,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 02:44:01,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 02:44:01,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1694269117] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:01,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476582986] [2021-10-16 02:44:01,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:44:01,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:44:01,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:44:01,215 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:44:01,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-16 02:44:02,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:44:02,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:44:02,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:44:02,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:44:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 02:44:02,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:44:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-16 02:44:03,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476582986] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:44:03,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:44:03,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 12] total 34 [2021-10-16 02:44:03,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517717265] [2021-10-16 02:44:03,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-16 02:44:03,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:44:03,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-16 02:44:03,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-10-16 02:44:03,621 INFO L87 Difference]: Start difference. First operand 8871 states and 33561 transitions. Second operand has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 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 02:45:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:51,191 INFO L93 Difference]: Finished difference Result 66577 states and 240081 transitions. [2021-10-16 02:45:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 601 states. [2021-10-16 02:45:51,193 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 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 45 [2021-10-16 02:45:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:51,600 INFO L225 Difference]: With dead ends: 66577 [2021-10-16 02:45:51,600 INFO L226 Difference]: Without dead ends: 63253 [2021-10-16 02:45:51,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182247 ImplicationChecksByTransitivity, 85922.5ms TimeCoverageRelationStatistics Valid=35551, Invalid=342059, Unknown=0, NotChecked=0, Total=377610 [2021-10-16 02:45:51,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63253 states. [2021-10-16 02:45:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63253 to 16347. [2021-10-16 02:45:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16347 states, 16346 states have (on average 4.056405236755169) internal successors, (66306), 16346 states have internal predecessors, (66306), 0 states have call successors, (0), 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 02:45:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16347 states to 16347 states and 66306 transitions. [2021-10-16 02:45:53,081 INFO L78 Accepts]: Start accepts. Automaton has 16347 states and 66306 transitions. Word has length 45 [2021-10-16 02:45:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:53,082 INFO L470 AbstractCegarLoop]: Abstraction has 16347 states and 66306 transitions. [2021-10-16 02:45:53,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 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 02:45:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 16347 states and 66306 transitions. [2021-10-16 02:45:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-16 02:45:53,161 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:53,161 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:53,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:53,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-10-16 02:45:53,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:53,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:53,775 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:45:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:53,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1774661145, now seen corresponding path program 11 times [2021-10-16 02:45:53,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:53,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588526689] [2021-10-16 02:45:53,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:45:53,777 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:53,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:53,777 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:53,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-10-16 02:45:55,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-16 02:45:55,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:45:55,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 02:45:55,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 02:45:56,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 02:45:56,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:56,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588526689] [2021-10-16 02:45:56,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588526689] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:56,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [957571916] [2021-10-16 02:45:56,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:45:56,861 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:56,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:45:56,861 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:45:56,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-10-16 02:46:33,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-16 02:46:33,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:46:33,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:46:33,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-16 02:46:34,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-16 02:46:35,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [957571916] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:35,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235989580] [2021-10-16 02:46:35,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:46:35,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:35,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:35,902 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:46:35,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-16 02:47:01,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-16 02:47:01,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:47:01,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:47:01,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:47:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 02:47:02,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:47:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 02:47:03,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235989580] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:47:03,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:47:03,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 11, 11, 12] total 57 [2021-10-16 02:47:03,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846158529] [2021-10-16 02:47:03,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-10-16 02:47:03,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:47:03,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-10-16 02:47:03,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2813, Unknown=0, NotChecked=0, Total=3192 [2021-10-16 02:47:03,217 INFO L87 Difference]: Start difference. First operand 16347 states and 66306 transitions. Second operand has 57 states, 57 states have (on average 2.508771929824561) internal successors, (143), 57 states have internal predecessors, (143), 0 states have call successors, (0), 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 02:47:36,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:47:36,906 INFO L93 Difference]: Finished difference Result 44139 states and 175692 transitions. [2021-10-16 02:47:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-10-16 02:47:36,907 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.508771929824561) internal successors, (143), 57 states have internal predecessors, (143), 0 states have call successors, (0), 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 45 [2021-10-16 02:47:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:47:36,907 INFO L225 Difference]: With dead ends: 44139 [2021-10-16 02:47:36,907 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:47:36,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13653 ImplicationChecksByTransitivity, 26079.2ms TimeCoverageRelationStatistics Valid=5168, Invalid=36652, Unknown=0, NotChecked=0, Total=41820 [2021-10-16 02:47:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:47:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:47:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 02:47:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:47:36,910 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2021-10-16 02:47:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:47:36,910 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:47:36,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.508771929824561) internal successors, (143), 57 states have internal predecessors, (143), 0 states have call successors, (0), 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 02:47:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:47:36,910 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:47:36,913 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:47:36,914 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-16 02:47:36,914 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-16 02:47:36,914 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-16 02:47:36,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-10-16 02:47:37,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-10-16 02:47:37,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-10-16 02:47:37,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:47:37,521 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-16 02:47:37,522 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:47:37,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:47:37 BasicIcfg [2021-10-16 02:47:37,524 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:47:37,525 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:47:37,525 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:47:37,526 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:47:37,526 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:39:32" (3/4) ... [2021-10-16 02:47:37,530 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:47:37,539 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-16 02:47:37,539 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-16 02:47:37,539 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-16 02:47:37,552 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-10-16 02:47:37,553 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 02:47:37,553 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:47:37,553 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:47:37,602 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:47:37,602 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:47:37,604 INFO L168 Benchmark]: Toolchain (without parser) took 486721.47 ms. Allocated memory was 54.5 MB in the beginning and 885.0 MB in the end (delta: 830.5 MB). Free memory was 32.5 MB in the beginning and 160.0 MB in the end (delta: -127.6 MB). Peak memory consumption was 703.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:37,604 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 54.5 MB. Free memory was 35.9 MB in the beginning and 35.9 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:47:37,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 435.49 ms. Allocated memory is still 54.5 MB. Free memory was 32.3 MB in the beginning and 33.3 MB in the end (delta: -1.0 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:37,606 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.02 ms. Allocated memory is still 54.5 MB. Free memory was 33.3 MB in the beginning and 31.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:37,606 INFO L168 Benchmark]: Boogie Preprocessor took 44.08 ms. Allocated memory is still 54.5 MB. Free memory was 31.5 MB in the beginning and 29.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:37,607 INFO L168 Benchmark]: RCFGBuilder took 825.81 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 29.7 MB in the beginning and 41.6 MB in the end (delta: -11.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:37,607 INFO L168 Benchmark]: TraceAbstraction took 485274.92 ms. Allocated memory was 69.2 MB in the beginning and 885.0 MB in the end (delta: 815.8 MB). Free memory was 41.0 MB in the beginning and 164.0 MB in the end (delta: -123.0 MB). Peak memory consumption was 692.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:37,608 INFO L168 Benchmark]: Witness Printer took 77.01 ms. Allocated memory is still 885.0 MB. Free memory was 164.0 MB in the beginning and 160.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:37,611 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 54.5 MB. Free memory was 35.9 MB in the beginning and 35.9 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 435.49 ms. Allocated memory is still 54.5 MB. Free memory was 32.3 MB in the beginning and 33.3 MB in the end (delta: -1.0 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.02 ms. Allocated memory is still 54.5 MB. Free memory was 33.3 MB in the beginning and 31.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.08 ms. Allocated memory is still 54.5 MB. Free memory was 31.5 MB in the beginning and 29.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 825.81 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 29.7 MB in the beginning and 41.6 MB in the end (delta: -11.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 485274.92 ms. Allocated memory was 69.2 MB in the beginning and 885.0 MB in the end (delta: 815.8 MB). Free memory was 41.0 MB in the beginning and 164.0 MB in the end (delta: -123.0 MB). Peak memory consumption was 692.8 MB. Max. memory is 16.1 GB. * Witness Printer took 77.01 ms. Allocated memory is still 885.0 MB. Free memory was 164.0 MB in the beginning and 160.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 18602.4ms, 164 PlacesBefore, 38 PlacesAfterwards, 170 TransitionsBefore, 34 TransitionsAfterwards, 1936 CoEnabledTransitionPairs, 7 FixpointIterations, 91 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 6 ConcurrentYvCompositions, 10 ChoiceCompositions, 153 TotalNumberOfCompositions, 3021 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2234, positive: 2144, positive conditional: 0, positive unconditional: 2144, negative: 90, negative conditional: 0, negative unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1293, positive: 1269, positive conditional: 0, positive unconditional: 1269, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1293, positive: 1269, positive conditional: 0, positive unconditional: 1269, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 24, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1362, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1362, negative conditional: 0, negative unconditional: 1362, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2234, positive: 875, positive conditional: 0, positive unconditional: 875, negative: 66, negative conditional: 0, negative unconditional: 66, unknown: 1293, unknown conditional: 0, unknown unconditional: 1293] , Statistics on independence cache: Total cache size (in pairs): 114, Positive cache size: 106, Positive conditional cache size: 0, Positive unconditional cache size: 106, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8 - 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 - PositiveResult [Line: 94]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 193 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 485063.4ms, OverallIterations: 25, TraceHistogramMax: 3, EmptinessCheckTime: 236.8ms, AutomataDifference: 300900.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18699.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2188 SDtfs, 10236 SDslu, 22209 SDs, 0 SdLazy, 32594 SolverSat, 1953 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 56455.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5373 GetRequests, 3462 SyntacticMatches, 1 SemanticMatches, 1910 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273361 ImplicationChecksByTransitivity, 244804.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16347occurred in iteration=24, InterpolantAutomatonStates: 1631, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3439.1ms AutomataMinimizationTime, 25 MinimizatonAttempts, 79696 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 839.5ms SsaConstructionTime, 83265.3ms SatisfiabilityAnalysisTime, 34844.3ms InterpolantComputationTime, 1703 NumberOfCodeBlocks, 1685 NumberOfCodeBlocksAsserted, 99 NumberOfCheckSat, 3302 ConstructedInterpolants, 8 QuantifiedInterpolants, 15988 SizeOfPredicates, 222 NumberOfNonLiveVariables, 6805 ConjunctsInSsa, 508 ConjunctsInUnsatCore, 104 InterpolantComputations, 23 PerfectInterpolantSequences, 991/1556 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-16 02:47:37,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7046250-2f84-4d9b-9c82-a90cb13a9193/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...