./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-optional-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/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_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-optional-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e6a59c2161f6b6239c5a03a0c424da05f95a5e0e ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/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_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-optional-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e6a59c2161f6b6239c5a03a0c424da05f95a5e0e .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:04:05,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:04:05,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:04:05,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:04:05,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:04:05,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:04:05,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:04:05,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:04:05,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:04:05,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:04:05,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:04:05,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:04:05,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:04:05,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:04:05,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:04:05,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:04:05,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:04:05,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:04:05,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:04:05,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:04:05,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:04:05,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:04:05,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:04:05,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:04:05,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:04:05,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:04:05,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:04:05,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:04:05,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:04:05,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:04:05,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:04:05,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:04:05,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:04:05,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:04:05,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:04:05,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:04:05,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:04:05,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:04:05,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:04:05,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:04:05,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:04:05,595 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 03:04:05,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:04:05,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:04:05,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:04:05,672 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:04:05,673 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:04:05,673 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:04:05,673 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:04:05,674 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:04:05,674 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:04:05,674 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:04:05,675 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:04:05,676 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:04:05,676 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:04:05,676 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:04:05,677 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:04:05,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 03:04:05,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 03:04:05,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:04:05,679 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:04:05,679 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 03:04:05,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:04:05,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:04:05,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:04:05,681 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 03:04:05,681 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 03:04:05,681 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 03:04:05,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:04:05,682 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:04:05,682 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:04:05,682 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:04:05,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:04:05,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:04:05,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:05,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:04:05,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:04:05,684 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:04:05,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:04:05,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:04:05,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:04:05,685 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_a371e49f-c23a-448d-b9ee-1930cccd3d2e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6a59c2161f6b6239c5a03a0c424da05f95a5e0e [2021-10-16 03:04:06,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:04:06,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:04:06,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:04:06,031 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:04:06,032 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:04:06,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/forester-heap/dll-optional-1.i [2021-10-16 03:04:06,140 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/data/cab436a29/c4f4d23e8d3e45b9837cd2b84a8fd612/FLAG7d3862d46 [2021-10-16 03:04:06,805 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:04:06,806 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/sv-benchmarks/c/forester-heap/dll-optional-1.i [2021-10-16 03:04:06,822 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/data/cab436a29/c4f4d23e8d3e45b9837cd2b84a8fd612/FLAG7d3862d46 [2021-10-16 03:04:07,049 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/data/cab436a29/c4f4d23e8d3e45b9837cd2b84a8fd612 [2021-10-16 03:04:07,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:04:07,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:04:07,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:07,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:04:07,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:04:07,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:07" (1/1) ... [2021-10-16 03:04:07,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba140f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:07, skipping insertion in model container [2021-10-16 03:04:07,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:07" (1/1) ... [2021-10-16 03:04:07,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:04:07,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:04:07,580 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_a371e49f-c23a-448d-b9ee-1930cccd3d2e/sv-benchmarks/c/forester-heap/dll-optional-1.i[22753,22766] [2021-10-16 03:04:07,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:07,598 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:04:07,650 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_a371e49f-c23a-448d-b9ee-1930cccd3d2e/sv-benchmarks/c/forester-heap/dll-optional-1.i[22753,22766] [2021-10-16 03:04:07,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:07,693 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:04:07,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:07 WrapperNode [2021-10-16 03:04:07,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:07,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:07,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:04:07,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:04:07,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:07" (1/1) ... [2021-10-16 03:04:07,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:07" (1/1) ... [2021-10-16 03:04:07,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:07,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:04:07,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:04:07,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:04:07,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:07" (1/1) ... [2021-10-16 03:04:07,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:07" (1/1) ... [2021-10-16 03:04:07,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:07" (1/1) ... [2021-10-16 03:04:07,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:07" (1/1) ... [2021-10-16 03:04:07,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:07" (1/1) ... [2021-10-16 03:04:07,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:07" (1/1) ... [2021-10-16 03:04:07,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:07" (1/1) ... [2021-10-16 03:04:07,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:04:07,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:04:07,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:04:07,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:04:07,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:07" (1/1) ... [2021-10-16 03:04:07,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:07,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:04:07,883 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:04:07,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:04:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 03:04:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 03:04:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 03:04:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 03:04:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:04:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 03:04:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:04:07,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:04:07,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:04:07,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:04:08,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:04:08,978 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-16 03:04:08,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:08 BoogieIcfgContainer [2021-10-16 03:04:08,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:04:08,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:04:08,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:04:08,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:04:08,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:04:07" (1/3) ... [2021-10-16 03:04:08,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f4cad40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:08, skipping insertion in model container [2021-10-16 03:04:08,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:07" (2/3) ... [2021-10-16 03:04:08,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f4cad40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:08, skipping insertion in model container [2021-10-16 03:04:08,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:08" (3/3) ... [2021-10-16 03:04:08,992 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2021-10-16 03:04:08,999 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:04:08,999 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2021-10-16 03:04:09,063 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:04:09,075 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 03:04:09,076 INFO L340 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2021-10-16 03:04:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 59 states have (on average 2.4745762711864407) internal successors, (146), 131 states have internal predecessors, (146), 0 states have call successors, (0), 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 03:04:09,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-16 03:04:09,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:09,114 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-16 03:04:09,115 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:09,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:09,121 INFO L82 PathProgramCache]: Analyzing trace with hash 8653, now seen corresponding path program 1 times [2021-10-16 03:04:09,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:09,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846351837] [2021-10-16 03:04:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:09,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:09,316 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 03:04:09,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:09,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846351837] [2021-10-16 03:04:09,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846351837] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:09,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:09,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 03:04:09,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165844946] [2021-10-16 03:04:09,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:09,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:09,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:09,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:09,363 INFO L87 Difference]: Start difference. First operand has 132 states, 59 states have (on average 2.4745762711864407) internal successors, (146), 131 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 03:04:09,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:09,650 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2021-10-16 03:04:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:09,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2021-10-16 03:04:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:09,700 INFO L225 Difference]: With dead ends: 131 [2021-10-16 03:04:09,700 INFO L226 Difference]: Without dead ends: 129 [2021-10-16 03:04:09,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:09,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-16 03:04:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-10-16 03:04:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 62 states have (on average 2.193548387096774) internal successors, (136), 123 states have internal predecessors, (136), 0 states have call successors, (0), 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 03:04:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 136 transitions. [2021-10-16 03:04:09,784 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 136 transitions. Word has length 2 [2021-10-16 03:04:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:09,785 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 136 transitions. [2021-10-16 03:04:09,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 03:04:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 136 transitions. [2021-10-16 03:04:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-16 03:04:09,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:09,786 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-16 03:04:09,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:04:09,787 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:09,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:09,789 INFO L82 PathProgramCache]: Analyzing trace with hash 8654, now seen corresponding path program 1 times [2021-10-16 03:04:09,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:09,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485288596] [2021-10-16 03:04:09,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:09,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:09,904 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 03:04:09,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:09,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485288596] [2021-10-16 03:04:09,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485288596] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:09,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:09,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 03:04:09,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921017126] [2021-10-16 03:04:09,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:09,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:09,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:09,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:09,911 INFO L87 Difference]: Start difference. First operand 124 states and 136 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 03:04:10,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:10,077 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2021-10-16 03:04:10,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:10,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2021-10-16 03:04:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:10,084 INFO L225 Difference]: With dead ends: 118 [2021-10-16 03:04:10,084 INFO L226 Difference]: Without dead ends: 118 [2021-10-16 03:04:10,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:10,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-16 03:04:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2021-10-16 03:04:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 114 states have internal predecessors, (127), 0 states have call successors, (0), 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 03:04:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-10-16 03:04:10,105 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 2 [2021-10-16 03:04:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:10,105 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-10-16 03:04:10,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 03:04:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-10-16 03:04:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 03:04:10,108 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:10,111 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:10,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 03:04:10,111 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1990743745, now seen corresponding path program 1 times [2021-10-16 03:04:10,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:10,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299551791] [2021-10-16 03:04:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:10,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:10,279 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 03:04:10,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:10,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299551791] [2021-10-16 03:04:10,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299551791] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:10,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:10,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:04:10,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095436881] [2021-10-16 03:04:10,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:04:10,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:10,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:04:10,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:10,297 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 03:04:10,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:10,571 INFO L93 Difference]: Finished difference Result 152 states and 169 transitions. [2021-10-16 03:04:10,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:04:10,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-10-16 03:04:10,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:10,577 INFO L225 Difference]: With dead ends: 152 [2021-10-16 03:04:10,577 INFO L226 Difference]: Without dead ends: 152 [2021-10-16 03:04:10,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:04:10,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-16 03:04:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 114. [2021-10-16 03:04:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 62 states have (on average 2.032258064516129) internal successors, (126), 113 states have internal predecessors, (126), 0 states have call successors, (0), 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 03:04:10,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2021-10-16 03:04:10,601 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 8 [2021-10-16 03:04:10,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:10,602 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2021-10-16 03:04:10,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 03:04:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2021-10-16 03:04:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 03:04:10,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:10,604 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:10,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 03:04:10,605 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:10,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:10,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1990743744, now seen corresponding path program 1 times [2021-10-16 03:04:10,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:10,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181232927] [2021-10-16 03:04:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:10,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:10,728 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 03:04:10,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:10,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181232927] [2021-10-16 03:04:10,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181232927] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:10,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:10,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:04:10,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135117599] [2021-10-16 03:04:10,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:04:10,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:10,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:04:10,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:10,738 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 03:04:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:10,950 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2021-10-16 03:04:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:04:10,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-10-16 03:04:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:10,951 INFO L225 Difference]: With dead ends: 113 [2021-10-16 03:04:10,952 INFO L226 Difference]: Without dead ends: 113 [2021-10-16 03:04:10,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:04:10,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-16 03:04:10,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-10-16 03:04:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 112 states have internal predecessors, (125), 0 states have call successors, (0), 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 03:04:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2021-10-16 03:04:10,958 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 8 [2021-10-16 03:04:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:10,958 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2021-10-16 03:04:10,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 03:04:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2021-10-16 03:04:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:04:10,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:10,959 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:10,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 03:04:10,960 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:10,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:10,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1844514240, now seen corresponding path program 1 times [2021-10-16 03:04:10,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:10,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163591213] [2021-10-16 03:04:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:10,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:11,111 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 03:04:11,111 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:11,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163591213] [2021-10-16 03:04:11,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163591213] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:11,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:11,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:04:11,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422458668] [2021-10-16 03:04:11,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:04:11,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:11,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:04:11,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:11,115 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 03:04:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:11,338 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2021-10-16 03:04:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:04:11,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-10-16 03:04:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:11,340 INFO L225 Difference]: With dead ends: 111 [2021-10-16 03:04:11,340 INFO L226 Difference]: Without dead ends: 111 [2021-10-16 03:04:11,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:11,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-16 03:04:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2021-10-16 03:04:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.8059701492537314) internal successors, (121), 103 states have internal predecessors, (121), 0 states have call successors, (0), 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 03:04:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2021-10-16 03:04:11,357 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 11 [2021-10-16 03:04:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:11,357 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2021-10-16 03:04:11,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 03:04:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2021-10-16 03:04:11,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:04:11,359 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:11,359 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:11,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 03:04:11,360 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:11,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:11,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1844514241, now seen corresponding path program 1 times [2021-10-16 03:04:11,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:11,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400145827] [2021-10-16 03:04:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:11,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:11,479 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 03:04:11,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:11,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400145827] [2021-10-16 03:04:11,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400145827] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:11,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:11,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:04:11,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577444962] [2021-10-16 03:04:11,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:04:11,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:11,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:04:11,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:11,483 INFO L87 Difference]: Start difference. First operand 104 states and 121 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 03:04:11,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:11,712 INFO L93 Difference]: Finished difference Result 150 states and 169 transitions. [2021-10-16 03:04:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:04:11,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-10-16 03:04:11,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:11,714 INFO L225 Difference]: With dead ends: 150 [2021-10-16 03:04:11,715 INFO L226 Difference]: Without dead ends: 150 [2021-10-16 03:04:11,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:11,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-16 03:04:11,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 129. [2021-10-16 03:04:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 92 states have (on average 1.6956521739130435) internal successors, (156), 128 states have internal predecessors, (156), 0 states have call successors, (0), 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 03:04:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2021-10-16 03:04:11,721 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 11 [2021-10-16 03:04:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:11,721 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2021-10-16 03:04:11,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 03:04:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2021-10-16 03:04:11,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 03:04:11,723 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:11,723 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:11,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 03:04:11,724 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:11,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1243133608, now seen corresponding path program 1 times [2021-10-16 03:04:11,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:11,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10410509] [2021-10-16 03:04:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:11,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:11,776 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 03:04:11,776 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:11,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10410509] [2021-10-16 03:04:11,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10410509] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:11,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:11,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:04:11,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046718540] [2021-10-16 03:04:11,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:04:11,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:11,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:04:11,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:11,780 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 03:04:11,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:11,964 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2021-10-16 03:04:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:04:11,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-10-16 03:04:11,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:11,966 INFO L225 Difference]: With dead ends: 128 [2021-10-16 03:04:11,966 INFO L226 Difference]: Without dead ends: 128 [2021-10-16 03:04:11,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:04:11,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-16 03:04:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-10-16 03:04:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 92 states have (on average 1.673913043478261) internal successors, (154), 127 states have internal predecessors, (154), 0 states have call successors, (0), 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 03:04:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 154 transitions. [2021-10-16 03:04:11,971 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 154 transitions. Word has length 13 [2021-10-16 03:04:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:11,972 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 154 transitions. [2021-10-16 03:04:11,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 03:04:11,975 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 154 transitions. [2021-10-16 03:04:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 03:04:11,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:11,977 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:11,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 03:04:11,977 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:11,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1243133607, now seen corresponding path program 1 times [2021-10-16 03:04:11,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:11,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907130363] [2021-10-16 03:04:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:11,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:12,120 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 03:04:12,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:12,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907130363] [2021-10-16 03:04:12,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907130363] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:12,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:12,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:04:12,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427745242] [2021-10-16 03:04:12,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:04:12,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:12,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:04:12,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:12,124 INFO L87 Difference]: Start difference. First operand 128 states and 154 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 03:04:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:12,331 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2021-10-16 03:04:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:04:12,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-10-16 03:04:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:12,333 INFO L225 Difference]: With dead ends: 127 [2021-10-16 03:04:12,333 INFO L226 Difference]: Without dead ends: 127 [2021-10-16 03:04:12,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:04:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-16 03:04:12,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-10-16 03:04:12,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 92 states have (on average 1.6521739130434783) internal successors, (152), 126 states have internal predecessors, (152), 0 states have call successors, (0), 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 03:04:12,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2021-10-16 03:04:12,338 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 13 [2021-10-16 03:04:12,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:12,339 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2021-10-16 03:04:12,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 03:04:12,339 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2021-10-16 03:04:12,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 03:04:12,341 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:12,341 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:12,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 03:04:12,342 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr71ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:12,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:12,342 INFO L82 PathProgramCache]: Analyzing trace with hash 112306669, now seen corresponding path program 1 times [2021-10-16 03:04:12,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:12,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618235343] [2021-10-16 03:04:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:12,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:12,382 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 03:04:12,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:12,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618235343] [2021-10-16 03:04:12,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618235343] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:12,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:12,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:04:12,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412763628] [2021-10-16 03:04:12,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:04:12,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:12,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:04:12,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:12,386 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 03:04:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:12,539 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2021-10-16 03:04:12,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:04:12,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-10-16 03:04:12,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:12,541 INFO L225 Difference]: With dead ends: 143 [2021-10-16 03:04:12,541 INFO L226 Difference]: Without dead ends: 143 [2021-10-16 03:04:12,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:12,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-16 03:04:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 127. [2021-10-16 03:04:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 92 states have (on average 1.6304347826086956) internal successors, (150), 126 states have internal predecessors, (150), 0 states have call successors, (0), 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 03:04:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2021-10-16 03:04:12,548 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 14 [2021-10-16 03:04:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:12,548 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2021-10-16 03:04:12,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 03:04:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2021-10-16 03:04:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 03:04:12,550 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:12,550 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:12,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 03:04:12,550 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:12,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:12,551 INFO L82 PathProgramCache]: Analyzing trace with hash -650305467, now seen corresponding path program 1 times [2021-10-16 03:04:12,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:12,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966302730] [2021-10-16 03:04:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:12,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:12,673 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 03:04:12,673 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:12,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966302730] [2021-10-16 03:04:12,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966302730] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:12,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:12,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-16 03:04:12,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767445890] [2021-10-16 03:04:12,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:04:12,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:12,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:04:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:04:12,677 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 03:04:13,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:13,020 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2021-10-16 03:04:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 03:04:13,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-10-16 03:04:13,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:13,023 INFO L225 Difference]: With dead ends: 128 [2021-10-16 03:04:13,023 INFO L226 Difference]: Without dead ends: 128 [2021-10-16 03:04:13,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:04:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-16 03:04:13,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-10-16 03:04:13,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 92 states have (on average 1.6195652173913044) internal successors, (149), 125 states have internal predecessors, (149), 0 states have call successors, (0), 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 03:04:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2021-10-16 03:04:13,029 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 15 [2021-10-16 03:04:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:13,029 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2021-10-16 03:04:13,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 03:04:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2021-10-16 03:04:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 03:04:13,031 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:13,031 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:13,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-16 03:04:13,032 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash -650305466, now seen corresponding path program 1 times [2021-10-16 03:04:13,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:13,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404280661] [2021-10-16 03:04:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:13,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:13,227 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 03:04:13,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:13,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404280661] [2021-10-16 03:04:13,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404280661] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:13,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:13,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-16 03:04:13,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588537269] [2021-10-16 03:04:13,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 03:04:13,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:13,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 03:04:13,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:04:13,232 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 03:04:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:13,753 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2021-10-16 03:04:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 03:04:13,754 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-10-16 03:04:13,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:13,755 INFO L225 Difference]: With dead ends: 118 [2021-10-16 03:04:13,755 INFO L226 Difference]: Without dead ends: 118 [2021-10-16 03:04:13,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 275.4ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-10-16 03:04:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-16 03:04:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2021-10-16 03:04:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 86 states have (on average 1.5232558139534884) internal successors, (131), 108 states have internal predecessors, (131), 0 states have call successors, (0), 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 03:04:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2021-10-16 03:04:13,758 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 15 [2021-10-16 03:04:13,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:13,758 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2021-10-16 03:04:13,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 03:04:13,759 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2021-10-16 03:04:13,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 03:04:13,759 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:13,760 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:13,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-16 03:04:13,760 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:13,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1773712200, now seen corresponding path program 1 times [2021-10-16 03:04:13,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:13,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795692976] [2021-10-16 03:04:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:13,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:13,820 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 03:04:13,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:13,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795692976] [2021-10-16 03:04:13,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795692976] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:13,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:13,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:04:13,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367963417] [2021-10-16 03:04:13,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:04:13,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:13,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:04:13,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:13,824 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 03:04:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:13,850 INFO L93 Difference]: Finished difference Result 131 states and 161 transitions. [2021-10-16 03:04:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:04:13,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-10-16 03:04:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:13,854 INFO L225 Difference]: With dead ends: 131 [2021-10-16 03:04:13,854 INFO L226 Difference]: Without dead ends: 131 [2021-10-16 03:04:13,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:13,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-16 03:04:13,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2021-10-16 03:04:13,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 90 states have (on average 1.5) internal successors, (135), 112 states have internal predecessors, (135), 0 states have call successors, (0), 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 03:04:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2021-10-16 03:04:13,861 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 18 [2021-10-16 03:04:13,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:13,863 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2021-10-16 03:04:13,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 03:04:13,864 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2021-10-16 03:04:13,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 03:04:13,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:13,868 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:13,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-16 03:04:13,869 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash -921621590, now seen corresponding path program 1 times [2021-10-16 03:04:13,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:13,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907802356] [2021-10-16 03:04:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:13,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:14,017 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 03:04:14,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:14,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907802356] [2021-10-16 03:04:14,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907802356] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:14,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:14,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-16 03:04:14,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644409909] [2021-10-16 03:04:14,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:04:14,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:14,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:04:14,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:04:14,021 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 03:04:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:14,440 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2021-10-16 03:04:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 03:04:14,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-10-16 03:04:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:14,443 INFO L225 Difference]: With dead ends: 200 [2021-10-16 03:04:14,443 INFO L226 Difference]: Without dead ends: 200 [2021-10-16 03:04:14,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:04:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-16 03:04:14,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 125. [2021-10-16 03:04:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 102 states have (on average 1.4803921568627452) internal successors, (151), 124 states have internal predecessors, (151), 0 states have call successors, (0), 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 03:04:14,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2021-10-16 03:04:14,449 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 19 [2021-10-16 03:04:14,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:14,449 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2021-10-16 03:04:14,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 03:04:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2021-10-16 03:04:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 03:04:14,451 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:14,451 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:14,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-16 03:04:14,451 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:14,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:14,452 INFO L82 PathProgramCache]: Analyzing trace with hash -921621589, now seen corresponding path program 1 times [2021-10-16 03:04:14,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:14,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140310918] [2021-10-16 03:04:14,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:14,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:14,557 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 03:04:14,557 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:14,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140310918] [2021-10-16 03:04:14,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140310918] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:14,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:14,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-16 03:04:14,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136403039] [2021-10-16 03:04:14,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 03:04:14,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:14,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 03:04:14,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:04:14,560 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 03:04:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:14,914 INFO L93 Difference]: Finished difference Result 185 states and 216 transitions. [2021-10-16 03:04:14,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 03:04:14,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-10-16 03:04:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:14,916 INFO L225 Difference]: With dead ends: 185 [2021-10-16 03:04:14,916 INFO L226 Difference]: Without dead ends: 185 [2021-10-16 03:04:14,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:04:14,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-16 03:04:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 121. [2021-10-16 03:04:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 98 states have (on average 1.4795918367346939) internal successors, (145), 120 states have internal predecessors, (145), 0 states have call successors, (0), 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 03:04:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2021-10-16 03:04:14,921 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 19 [2021-10-16 03:04:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:14,922 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2021-10-16 03:04:14,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 03:04:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2021-10-16 03:04:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 03:04:14,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:14,923 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] [2021-10-16 03:04:14,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-16 03:04:14,923 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:14,924 INFO L82 PathProgramCache]: Analyzing trace with hash 116840971, now seen corresponding path program 1 times [2021-10-16 03:04:14,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:14,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364629704] [2021-10-16 03:04:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:14,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:15,040 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 03:04:15,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:15,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364629704] [2021-10-16 03:04:15,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364629704] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:15,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:15,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-16 03:04:15,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162057303] [2021-10-16 03:04:15,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 03:04:15,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:15,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 03:04:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:04:15,044 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 03:04:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:15,605 INFO L93 Difference]: Finished difference Result 255 states and 302 transitions. [2021-10-16 03:04:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:04:15,606 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-10-16 03:04:15,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:15,608 INFO L225 Difference]: With dead ends: 255 [2021-10-16 03:04:15,608 INFO L226 Difference]: Without dead ends: 255 [2021-10-16 03:04:15,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:04:15,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-10-16 03:04:15,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 132. [2021-10-16 03:04:15,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 109 states have (on average 1.4678899082568808) internal successors, (160), 131 states have internal predecessors, (160), 0 states have call successors, (0), 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 03:04:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 160 transitions. [2021-10-16 03:04:15,615 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 160 transitions. Word has length 20 [2021-10-16 03:04:15,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:15,616 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 160 transitions. [2021-10-16 03:04:15,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 03:04:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 160 transitions. [2021-10-16 03:04:15,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 03:04:15,617 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:15,617 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] [2021-10-16 03:04:15,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-16 03:04:15,618 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:15,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:15,619 INFO L82 PathProgramCache]: Analyzing trace with hash 116840972, now seen corresponding path program 1 times [2021-10-16 03:04:15,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:15,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591603962] [2021-10-16 03:04:15,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:15,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:15,823 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 03:04:15,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:15,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591603962] [2021-10-16 03:04:15,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591603962] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:15,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:15,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-16 03:04:15,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247105734] [2021-10-16 03:04:15,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:04:15,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:15,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:04:15,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:04:15,832 INFO L87 Difference]: Start difference. First operand 132 states and 160 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 03:04:16,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:16,552 INFO L93 Difference]: Finished difference Result 198 states and 233 transitions. [2021-10-16 03:04:16,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 03:04:16,553 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-10-16 03:04:16,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:16,555 INFO L225 Difference]: With dead ends: 198 [2021-10-16 03:04:16,555 INFO L226 Difference]: Without dead ends: 198 [2021-10-16 03:04:16,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-10-16 03:04:16,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-16 03:04:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 132. [2021-10-16 03:04:16,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 109 states have (on average 1.4587155963302751) internal successors, (159), 131 states have internal predecessors, (159), 0 states have call successors, (0), 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 03:04:16,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 159 transitions. [2021-10-16 03:04:16,560 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 159 transitions. Word has length 20 [2021-10-16 03:04:16,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:16,561 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 159 transitions. [2021-10-16 03:04:16,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 03:04:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 159 transitions. [2021-10-16 03:04:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 03:04:16,563 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:16,563 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] [2021-10-16 03:04:16,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-16 03:04:16,563 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:16,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:16,564 INFO L82 PathProgramCache]: Analyzing trace with hash -555968527, now seen corresponding path program 1 times [2021-10-16 03:04:16,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:16,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040585329] [2021-10-16 03:04:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:16,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:16,589 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 03:04:16,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:16,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040585329] [2021-10-16 03:04:16,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040585329] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:16,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:16,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:04:16,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156844661] [2021-10-16 03:04:16,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:16,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:16,593 INFO L87 Difference]: Start difference. First operand 132 states and 159 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 03:04:16,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:16,603 INFO L93 Difference]: Finished difference Result 134 states and 161 transitions. [2021-10-16 03:04:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:16,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-10-16 03:04:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:16,605 INFO L225 Difference]: With dead ends: 134 [2021-10-16 03:04:16,606 INFO L226 Difference]: Without dead ends: 134 [2021-10-16 03:04:16,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:16,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-16 03:04:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-10-16 03:04:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 111 states have (on average 1.4504504504504505) internal successors, (161), 133 states have internal predecessors, (161), 0 states have call successors, (0), 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 03:04:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 161 transitions. [2021-10-16 03:04:16,611 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 161 transitions. Word has length 20 [2021-10-16 03:04:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:16,611 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 161 transitions. [2021-10-16 03:04:16,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 03:04:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 161 transitions. [2021-10-16 03:04:16,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 03:04:16,613 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:16,613 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] [2021-10-16 03:04:16,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-16 03:04:16,613 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1637936928, now seen corresponding path program 1 times [2021-10-16 03:04:16,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:16,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120426131] [2021-10-16 03:04:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:16,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:16,666 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 03:04:16,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:16,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120426131] [2021-10-16 03:04:16,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120426131] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:16,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:16,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:04:16,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964438854] [2021-10-16 03:04:16,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:04:16,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:16,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:04:16,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:16,669 INFO L87 Difference]: Start difference. First operand 134 states and 161 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 03:04:16,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:16,841 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2021-10-16 03:04:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:04:16,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-10-16 03:04:16,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:16,843 INFO L225 Difference]: With dead ends: 140 [2021-10-16 03:04:16,844 INFO L226 Difference]: Without dead ends: 140 [2021-10-16 03:04:16,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:04:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-16 03:04:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 133. [2021-10-16 03:04:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 111 states have (on average 1.4414414414414414) internal successors, (160), 132 states have internal predecessors, (160), 0 states have call successors, (0), 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 03:04:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2021-10-16 03:04:16,848 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 20 [2021-10-16 03:04:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:16,848 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2021-10-16 03:04:16,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 03:04:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2021-10-16 03:04:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 03:04:16,849 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:16,849 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] [2021-10-16 03:04:16,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-16 03:04:16,850 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:16,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:16,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1637936927, now seen corresponding path program 1 times [2021-10-16 03:04:16,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:16,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702496417] [2021-10-16 03:04:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:16,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:16,915 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 03:04:16,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:16,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702496417] [2021-10-16 03:04:16,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702496417] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:16,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:16,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:04:16,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39950094] [2021-10-16 03:04:16,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:04:16,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:16,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:04:16,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:16,918 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 03:04:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:17,076 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2021-10-16 03:04:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:04:17,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-10-16 03:04:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:17,078 INFO L225 Difference]: With dead ends: 132 [2021-10-16 03:04:17,078 INFO L226 Difference]: Without dead ends: 132 [2021-10-16 03:04:17,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:04:17,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-16 03:04:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-10-16 03:04:17,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 111 states have (on average 1.4324324324324325) internal successors, (159), 131 states have internal predecessors, (159), 0 states have call successors, (0), 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 03:04:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 159 transitions. [2021-10-16 03:04:17,083 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 159 transitions. Word has length 20 [2021-10-16 03:04:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:17,083 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 159 transitions. [2021-10-16 03:04:17,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 03:04:17,083 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 159 transitions. [2021-10-16 03:04:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 03:04:17,084 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:17,085 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 03:04:17,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-16 03:04:17,085 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:17,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:17,086 INFO L82 PathProgramCache]: Analyzing trace with hash -55028158, now seen corresponding path program 1 times [2021-10-16 03:04:17,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:17,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811366332] [2021-10-16 03:04:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:17,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:17,217 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 03:04:17,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:17,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811366332] [2021-10-16 03:04:17,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811366332] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:17,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:17,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 03:04:17,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157855739] [2021-10-16 03:04:17,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:04:17,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:17,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:04:17,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:04:17,222 INFO L87 Difference]: Start difference. First operand 132 states and 159 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 03:04:17,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:17,511 INFO L93 Difference]: Finished difference Result 194 states and 228 transitions. [2021-10-16 03:04:17,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 03:04:17,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 03:04:17,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:17,513 INFO L225 Difference]: With dead ends: 194 [2021-10-16 03:04:17,514 INFO L226 Difference]: Without dead ends: 194 [2021-10-16 03:04:17,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:04:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-16 03:04:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 137. [2021-10-16 03:04:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 116 states have (on average 1.4224137931034482) internal successors, (165), 136 states have internal predecessors, (165), 0 states have call successors, (0), 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 03:04:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 165 transitions. [2021-10-16 03:04:17,519 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 165 transitions. Word has length 21 [2021-10-16 03:04:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:17,519 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 165 transitions. [2021-10-16 03:04:17,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 03:04:17,519 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 165 transitions. [2021-10-16 03:04:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 03:04:17,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:17,520 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:17,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-16 03:04:17,520 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1475080291, now seen corresponding path program 1 times [2021-10-16 03:04:17,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:17,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470951859] [2021-10-16 03:04:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:17,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:17,634 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 03:04:17,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:17,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470951859] [2021-10-16 03:04:17,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470951859] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:17,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:17,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-16 03:04:17,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069881758] [2021-10-16 03:04:17,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 03:04:17,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 03:04:17,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:04:17,637 INFO L87 Difference]: Start difference. First operand 137 states and 165 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 03:04:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:18,050 INFO L93 Difference]: Finished difference Result 201 states and 232 transitions. [2021-10-16 03:04:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:04:18,053 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 03:04:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:18,054 INFO L225 Difference]: With dead ends: 201 [2021-10-16 03:04:18,055 INFO L226 Difference]: Without dead ends: 201 [2021-10-16 03:04:18,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:04:18,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-10-16 03:04:18,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 137. [2021-10-16 03:04:18,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 116 states have (on average 1.4137931034482758) internal successors, (164), 136 states have internal predecessors, (164), 0 states have call successors, (0), 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 03:04:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 164 transitions. [2021-10-16 03:04:18,061 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 164 transitions. Word has length 22 [2021-10-16 03:04:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:18,061 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 164 transitions. [2021-10-16 03:04:18,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 03:04:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 164 transitions. [2021-10-16 03:04:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 03:04:18,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:18,063 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 03:04:18,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-16 03:04:18,063 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:18,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2141645665, now seen corresponding path program 1 times [2021-10-16 03:04:18,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:18,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694970544] [2021-10-16 03:04:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:18,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:18,180 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 03:04:18,180 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:18,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694970544] [2021-10-16 03:04:18,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694970544] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:18,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:18,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-16 03:04:18,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230432209] [2021-10-16 03:04:18,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:04:18,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:18,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:04:18,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:04:18,183 INFO L87 Difference]: Start difference. First operand 137 states and 164 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 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 03:04:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:18,386 INFO L93 Difference]: Finished difference Result 177 states and 212 transitions. [2021-10-16 03:04:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 03:04:18,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 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 03:04:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:18,392 INFO L225 Difference]: With dead ends: 177 [2021-10-16 03:04:18,392 INFO L226 Difference]: Without dead ends: 177 [2021-10-16 03:04:18,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:04:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-16 03:04:18,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 140. [2021-10-16 03:04:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 119 states have (on average 1.4201680672268908) internal successors, (169), 139 states have internal predecessors, (169), 0 states have call successors, (0), 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 03:04:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 169 transitions. [2021-10-16 03:04:18,406 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 169 transitions. Word has length 23 [2021-10-16 03:04:18,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:18,406 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 169 transitions. [2021-10-16 03:04:18,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 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 03:04:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 169 transitions. [2021-10-16 03:04:18,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 03:04:18,409 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:18,410 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 03:04:18,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-16 03:04:18,410 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:18,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1460341743, now seen corresponding path program 1 times [2021-10-16 03:04:18,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:18,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900109884] [2021-10-16 03:04:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:18,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:18,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:18,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900109884] [2021-10-16 03:04:18,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900109884] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:18,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:18,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:04:18,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102352098] [2021-10-16 03:04:18,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:04:18,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:18,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:04:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:18,456 INFO L87 Difference]: Start difference. First operand 140 states and 169 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 03:04:18,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:18,483 INFO L93 Difference]: Finished difference Result 151 states and 180 transitions. [2021-10-16 03:04:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:04:18,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 03:04:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:18,485 INFO L225 Difference]: With dead ends: 151 [2021-10-16 03:04:18,486 INFO L226 Difference]: Without dead ends: 151 [2021-10-16 03:04:18,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-16 03:04:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 144. [2021-10-16 03:04:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 123 states have (on average 1.3902439024390243) internal successors, (171), 143 states have internal predecessors, (171), 0 states have call successors, (0), 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 03:04:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 171 transitions. [2021-10-16 03:04:18,491 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 171 transitions. Word has length 23 [2021-10-16 03:04:18,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:18,492 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 171 transitions. [2021-10-16 03:04:18,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 03:04:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 171 transitions. [2021-10-16 03:04:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 03:04:18,493 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:18,493 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] [2021-10-16 03:04:18,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-16 03:04:18,494 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:18,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:18,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1337804832, now seen corresponding path program 1 times [2021-10-16 03:04:18,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:18,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819897915] [2021-10-16 03:04:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:18,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:18,623 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 03:04:18,623 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:18,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819897915] [2021-10-16 03:04:18,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819897915] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 03:04:18,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972181043] [2021-10-16 03:04:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:18,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:04:18,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:04:18,630 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:04:18,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 03:04:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:18,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 03:04:18,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:18,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:04:18,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:04:18,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:18,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:04:18,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:18,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:04:19,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:19,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-10-16 03:04:19,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-16 03:04:19,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:19,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 03:04:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 03:04:19,724 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-10-16 03:04:19,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 50 [2021-10-16 03:04:19,756 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-10-16 03:04:19,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 25 [2021-10-16 03:04:19,773 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 03:04:19,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:21,238 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:21,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-16 03:04:21,243 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:21,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-10-16 03:04:24,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2021-10-16 03:04:24,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-10-16 03:04:24,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2021-10-16 03:04:24,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-10-16 03:04:24,319 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 03:04:24,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972181043] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:04:24,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1516475564] [2021-10-16 03:04:24,345 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-10-16 03:04:24,345 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 03:04:24,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 03:04:24,358 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 03:04:24,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 03:04:24,405 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:24,406 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:04:24,406 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:24,407 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 03:04:24,408 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:04:24,409 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:24,410 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-10-16 03:04:24,411 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-16 03:04:24,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:24,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:24,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:24,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:24,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:24,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:24,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:24,467 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-16 03:04:24,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 54 [2021-10-16 03:04:24,468 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:24,471 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-16 03:04:24,472 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:24,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-16 03:04:24,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:04:24,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:04:24,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:24,485 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:24,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-10-16 03:04:24,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:04:24,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:128, output treesize:112 [2021-10-16 03:04:24,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:24,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:04:24,717 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_120| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 03:04:24,720 INFO L168 Benchmark]: Toolchain (without parser) took 17665.59 ms. Allocated memory was 125.8 MB in the beginning and 157.3 MB in the end (delta: 31.5 MB). Free memory was 90.8 MB in the beginning and 62.2 MB in the end (delta: 28.5 MB). Peak memory consumption was 60.0 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:24,721 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 81.8 MB. Free memory was 54.1 MB in the beginning and 54.0 MB in the end (delta: 30.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:04:24,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.89 ms. Allocated memory is still 125.8 MB. Free memory was 90.8 MB in the beginning and 96.2 MB in the end (delta: -5.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:24,721 INFO L168 Benchmark]: Boogie Procedure Inliner took 77.29 ms. Allocated memory is still 125.8 MB. Free memory was 96.2 MB in the beginning and 94.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:24,722 INFO L168 Benchmark]: Boogie Preprocessor took 46.14 ms. Allocated memory is still 125.8 MB. Free memory was 94.1 MB in the beginning and 92.0 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:04:24,722 INFO L168 Benchmark]: RCFGBuilder took 1161.53 ms. Allocated memory is still 125.8 MB. Free memory was 92.0 MB in the beginning and 63.0 MB in the end (delta: 29.0 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:24,723 INFO L168 Benchmark]: TraceAbstraction took 15735.38 ms. Allocated memory was 125.8 MB in the beginning and 157.3 MB in the end (delta: 31.5 MB). Free memory was 62.6 MB in the beginning and 62.2 MB in the end (delta: 413.7 kB). Peak memory consumption was 35.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:24,725 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 81.8 MB. Free memory was 54.1 MB in the beginning and 54.0 MB in the end (delta: 30.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 637.89 ms. Allocated memory is still 125.8 MB. Free memory was 90.8 MB in the beginning and 96.2 MB in the end (delta: -5.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 77.29 ms. Allocated memory is still 125.8 MB. Free memory was 96.2 MB in the beginning and 94.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.14 ms. Allocated memory is still 125.8 MB. Free memory was 94.1 MB in the beginning and 92.0 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1161.53 ms. Allocated memory is still 125.8 MB. Free memory was 92.0 MB in the beginning and 63.0 MB in the end (delta: 29.0 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15735.38 ms. Allocated memory was 125.8 MB in the beginning and 157.3 MB in the end (delta: 31.5 MB). Free memory was 62.6 MB in the beginning and 62.2 MB in the end (delta: 413.7 kB). Peak memory consumption was 35.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_120| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_120|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 03:04:24,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:04:27,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:04:27,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:04:27,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:04:27,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:04:27,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:04:27,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:04:27,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:04:27,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:04:27,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:04:27,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:04:27,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:04:27,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:04:27,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:04:27,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:04:27,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:04:27,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:04:27,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:04:27,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:04:27,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:04:27,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:04:27,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:04:27,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:04:27,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:04:27,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:04:27,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:04:27,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:04:27,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:04:27,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:04:27,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:04:27,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:04:27,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:04:27,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:04:27,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:04:27,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:04:27,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:04:27,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:04:27,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:04:27,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:04:27,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:04:27,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:04:27,703 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-16 03:04:27,736 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:04:27,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:04:27,738 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:04:27,738 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:04:27,739 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:04:27,739 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:04:27,739 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:04:27,740 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:04:27,740 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:04:27,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 03:04:27,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 03:04:27,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:04:27,742 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:04:27,742 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 03:04:27,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:04:27,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:04:27,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:04:27,743 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 03:04:27,744 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 03:04:27,744 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 03:04:27,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:04:27,745 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:04:27,745 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 03:04:27,745 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 03:04:27,746 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:04:27,746 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:04:27,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:04:27,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 03:04:27,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:04:27,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:27,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:04:27,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:04:27,748 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 03:04:27,748 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 03:04:27,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:04:27,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:04:27,749 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_a371e49f-c23a-448d-b9ee-1930cccd3d2e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6a59c2161f6b6239c5a03a0c424da05f95a5e0e [2021-10-16 03:04:28,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:04:28,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:04:28,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:04:28,288 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:04:28,289 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:04:28,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/forester-heap/dll-optional-1.i [2021-10-16 03:04:28,372 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/data/2ff9dc925/47730a0369c346c19adba9f0bdf6656b/FLAG6f8fe9ee5 [2021-10-16 03:04:29,147 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:04:29,148 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/sv-benchmarks/c/forester-heap/dll-optional-1.i [2021-10-16 03:04:29,175 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/data/2ff9dc925/47730a0369c346c19adba9f0bdf6656b/FLAG6f8fe9ee5 [2021-10-16 03:04:29,363 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/data/2ff9dc925/47730a0369c346c19adba9f0bdf6656b [2021-10-16 03:04:29,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:04:29,369 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:04:29,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:29,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:04:29,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:04:29,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:29" (1/1) ... [2021-10-16 03:04:29,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@403817f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:29, skipping insertion in model container [2021-10-16 03:04:29,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:29" (1/1) ... [2021-10-16 03:04:29,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:04:29,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:04:29,954 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_a371e49f-c23a-448d-b9ee-1930cccd3d2e/sv-benchmarks/c/forester-heap/dll-optional-1.i[22753,22766] [2021-10-16 03:04:29,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:30,004 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:04:30,057 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_a371e49f-c23a-448d-b9ee-1930cccd3d2e/sv-benchmarks/c/forester-heap/dll-optional-1.i[22753,22766] [2021-10-16 03:04:30,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:30,103 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:04:30,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:30 WrapperNode [2021-10-16 03:04:30,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:30,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:30,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:04:30,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:04:30,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:30" (1/1) ... [2021-10-16 03:04:30,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:30" (1/1) ... [2021-10-16 03:04:30,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:30,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:04:30,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:04:30,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:04:30,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:30" (1/1) ... [2021-10-16 03:04:30,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:30" (1/1) ... [2021-10-16 03:04:30,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:30" (1/1) ... [2021-10-16 03:04:30,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:30" (1/1) ... [2021-10-16 03:04:30,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:30" (1/1) ... [2021-10-16 03:04:30,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:30" (1/1) ... [2021-10-16 03:04:30,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:30" (1/1) ... [2021-10-16 03:04:30,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:04:30,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:04:30,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:04:30,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:04:30,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:30" (1/1) ... [2021-10-16 03:04:30,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:30,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:04:30,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:04:30,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:04:30,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 03:04:30,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 03:04:30,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 03:04:30,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:04:30,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 03:04:30,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:04:30,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 03:04:30,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 03:04:30,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:04:30,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:04:31,411 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:04:31,411 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-16 03:04:31,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:31 BoogieIcfgContainer [2021-10-16 03:04:31,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:04:31,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:04:31,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:04:31,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:04:31,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:04:29" (1/3) ... [2021-10-16 03:04:31,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5b623c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:31, skipping insertion in model container [2021-10-16 03:04:31,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:30" (2/3) ... [2021-10-16 03:04:31,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5b623c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:31, skipping insertion in model container [2021-10-16 03:04:31,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:31" (3/3) ... [2021-10-16 03:04:31,424 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2021-10-16 03:04:31,430 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:04:31,431 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2021-10-16 03:04:31,484 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:04:31,491 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 03:04:31,491 INFO L340 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2021-10-16 03:04:31,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 77 states have (on average 2.155844155844156) internal successors, (166), 149 states have internal predecessors, (166), 0 states have call successors, (0), 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 03:04:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 03:04:31,517 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:31,518 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 03:04:31,519 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:31,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:31,542 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-10-16 03:04:31,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:31,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912154891] [2021-10-16 03:04:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:31,555 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:31,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:31,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:31,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 03:04:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:31,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 03:04:31,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:31,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:04:31,785 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 03:04:31,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:31,809 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 03:04:31,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:31,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912154891] [2021-10-16 03:04:31,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912154891] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:31,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:31,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 03:04:31,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143526308] [2021-10-16 03:04:31,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:31,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:31,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:31,849 INFO L87 Difference]: Start difference. First operand has 150 states, 77 states have (on average 2.155844155844156) internal successors, (166), 149 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 03:04:32,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:32,368 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2021-10-16 03:04:32,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:32,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-10-16 03:04:32,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:32,389 INFO L225 Difference]: With dead ends: 151 [2021-10-16 03:04:32,390 INFO L226 Difference]: Without dead ends: 147 [2021-10-16 03:04:32,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-16 03:04:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2021-10-16 03:04:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 140 states have internal predecessors, (153), 0 states have call successors, (0), 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 03:04:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 153 transitions. [2021-10-16 03:04:32,441 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 153 transitions. Word has length 3 [2021-10-16 03:04:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:32,441 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 153 transitions. [2021-10-16 03:04:32,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 03:04:32,442 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 153 transitions. [2021-10-16 03:04:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 03:04:32,443 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:32,443 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 03:04:32,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:32,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:04:32,653 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:32,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:32,654 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-10-16 03:04:32,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:32,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57574453] [2021-10-16 03:04:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:32,656 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:32,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:32,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:32,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 03:04:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:04:32,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:32,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:04:32,774 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 03:04:32,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:32,848 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 03:04:32,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:32,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57574453] [2021-10-16 03:04:32,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57574453] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:32,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:32,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 03:04:32,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658726414] [2021-10-16 03:04:32,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:04:32,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:32,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:04:32,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:32,853 INFO L87 Difference]: Start difference. First operand 141 states and 153 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 03:04:33,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:33,361 INFO L93 Difference]: Finished difference Result 136 states and 148 transitions. [2021-10-16 03:04:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:33,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 3 [2021-10-16 03:04:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:33,364 INFO L225 Difference]: With dead ends: 136 [2021-10-16 03:04:33,365 INFO L226 Difference]: Without dead ends: 136 [2021-10-16 03:04:33,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:33,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-16 03:04:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2021-10-16 03:04:33,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 79 states have (on average 1.8227848101265822) internal successors, (144), 131 states have internal predecessors, (144), 0 states have call successors, (0), 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 03:04:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 144 transitions. [2021-10-16 03:04:33,382 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 144 transitions. Word has length 3 [2021-10-16 03:04:33,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:33,383 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 144 transitions. [2021-10-16 03:04:33,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 03:04:33,383 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 144 transitions. [2021-10-16 03:04:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:04:33,384 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:33,385 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:33,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:33,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:04:33,598 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2006091119, now seen corresponding path program 1 times [2021-10-16 03:04:33,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:33,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015957956] [2021-10-16 03:04:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:33,602 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:33,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:33,610 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:33,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 03:04:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:33,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:04:33,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:33,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:04:33,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-16 03:04:33,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-16 03:04:33,788 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 03:04:33,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:33,847 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 03:04:33,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:33,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015957956] [2021-10-16 03:04:33,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015957956] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:33,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:33,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 03:04:33,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399579687] [2021-10-16 03:04:33,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:04:33,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:33,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:04:33,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:33,852 INFO L87 Difference]: Start difference. First operand 132 states and 144 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 03:04:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:34,790 INFO L93 Difference]: Finished difference Result 175 states and 192 transitions. [2021-10-16 03:04:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 03:04:34,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-10-16 03:04:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:34,793 INFO L225 Difference]: With dead ends: 175 [2021-10-16 03:04:34,794 INFO L226 Difference]: Without dead ends: 175 [2021-10-16 03:04:34,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:04:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-10-16 03:04:34,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 131. [2021-10-16 03:04:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 79 states have (on average 1.8101265822784811) internal successors, (143), 130 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 03:04:34,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2021-10-16 03:04:34,823 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 11 [2021-10-16 03:04:34,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:34,824 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2021-10-16 03:04:34,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 03:04:34,824 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2021-10-16 03:04:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:04:34,825 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:34,825 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:34,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:35,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:04:35,040 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:35,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2006091120, now seen corresponding path program 1 times [2021-10-16 03:04:35,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:35,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204970004] [2021-10-16 03:04:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:35,045 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:35,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:35,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:35,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 03:04:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:35,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 03:04:35,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:35,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:04:35,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:04:35,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-16 03:04:35,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-10-16 03:04:35,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-10-16 03:04:35,381 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 03:04:35,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:35,668 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 03:04:35,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:35,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204970004] [2021-10-16 03:04:35,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204970004] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:35,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:35,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 03:04:35,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580536787] [2021-10-16 03:04:35,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:04:35,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:35,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:04:35,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:04:35,674 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 03:04:37,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:37,447 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2021-10-16 03:04:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 03:04:37,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 11 [2021-10-16 03:04:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:37,450 INFO L225 Difference]: With dead ends: 130 [2021-10-16 03:04:37,450 INFO L226 Difference]: Without dead ends: 130 [2021-10-16 03:04:37,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:04:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-16 03:04:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-10-16 03:04:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 79 states have (on average 1.7974683544303798) internal successors, (142), 129 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 03:04:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2021-10-16 03:04:37,463 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 11 [2021-10-16 03:04:37,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:37,464 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2021-10-16 03:04:37,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 03:04:37,465 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2021-10-16 03:04:37,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:04:37,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:37,466 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:37,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:37,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:04:37,680 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:37,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:37,681 INFO L82 PathProgramCache]: Analyzing trace with hash 710692029, now seen corresponding path program 1 times [2021-10-16 03:04:37,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:37,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049059783] [2021-10-16 03:04:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:37,682 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:37,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:37,685 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:37,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 03:04:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:37,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:04:37,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:37,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:04:37,933 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 03:04:37,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-10-16 03:04:37,976 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 03:04:37,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:38,052 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 03:04:38,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:38,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049059783] [2021-10-16 03:04:38,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049059783] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:38,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:38,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 03:04:38,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830104347] [2021-10-16 03:04:38,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:04:38,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:38,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:04:38,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:38,058 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 03:04:38,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:38,590 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2021-10-16 03:04:38,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:04:38,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-10-16 03:04:38,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:38,592 INFO L225 Difference]: With dead ends: 131 [2021-10-16 03:04:38,592 INFO L226 Difference]: Without dead ends: 131 [2021-10-16 03:04:38,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-16 03:04:38,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 122. [2021-10-16 03:04:38,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 85 states have (on average 1.6352941176470588) internal successors, (139), 121 states have internal predecessors, (139), 0 states have call successors, (0), 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 03:04:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 139 transitions. [2021-10-16 03:04:38,618 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 139 transitions. Word has length 11 [2021-10-16 03:04:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:38,618 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 139 transitions. [2021-10-16 03:04:38,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 03:04:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 139 transitions. [2021-10-16 03:04:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:04:38,620 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:38,620 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:38,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-16 03:04:38,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:04:38,837 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:38,837 INFO L82 PathProgramCache]: Analyzing trace with hash 710692030, now seen corresponding path program 1 times [2021-10-16 03:04:38,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:38,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671081238] [2021-10-16 03:04:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:38,838 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:38,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:38,839 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:38,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 03:04:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:38,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:04:38,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:38,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:04:39,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:04:39,227 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 03:04:39,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-16 03:04:39,242 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:04:39,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-10-16 03:04:39,298 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 03:04:39,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:42,274 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 03:04:42,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:42,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671081238] [2021-10-16 03:04:42,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671081238] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:42,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:42,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 03:04:42,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356892234] [2021-10-16 03:04:42,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:04:42,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:42,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:04:42,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-10-16 03:04:42,286 INFO L87 Difference]: Start difference. First operand 122 states and 139 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 03:04:58,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:58,219 INFO L93 Difference]: Finished difference Result 177 states and 195 transitions. [2021-10-16 03:04:58,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 03:04:58,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 11 [2021-10-16 03:04:58,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:58,222 INFO L225 Difference]: With dead ends: 177 [2021-10-16 03:04:58,223 INFO L226 Difference]: Without dead ends: 177 [2021-10-16 03:04:58,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12744.8ms TimeCoverageRelationStatistics Valid=51, Invalid=79, Unknown=2, NotChecked=0, Total=132 [2021-10-16 03:04:58,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-16 03:04:58,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 138. [2021-10-16 03:04:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 137 states have internal predecessors, (159), 0 states have call successors, (0), 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 03:04:58,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 159 transitions. [2021-10-16 03:04:58,232 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 159 transitions. Word has length 11 [2021-10-16 03:04:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:58,232 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 159 transitions. [2021-10-16 03:04:58,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 03:04:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 159 transitions. [2021-10-16 03:04:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 03:04:58,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:58,234 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:58,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:58,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:04:58,453 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:58,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:58,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1962503516, now seen corresponding path program 1 times [2021-10-16 03:04:58,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:58,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324952395] [2021-10-16 03:04:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:58,454 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:58,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:58,455 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:58,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 03:04:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:58,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:04:58,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:58,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:04:58,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-16 03:04:58,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-16 03:04:58,734 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 03:04:58,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:58,800 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 03:04:58,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:58,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324952395] [2021-10-16 03:04:58,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324952395] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:58,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:58,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 03:04:58,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967727661] [2021-10-16 03:04:58,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:04:58,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:58,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:04:58,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:58,802 INFO L87 Difference]: Start difference. First operand 138 states and 159 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 03:04:59,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:59,563 INFO L93 Difference]: Finished difference Result 137 states and 158 transitions. [2021-10-16 03:04:59,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 03:04:59,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-10-16 03:04:59,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:59,565 INFO L225 Difference]: With dead ends: 137 [2021-10-16 03:04:59,565 INFO L226 Difference]: Without dead ends: 137 [2021-10-16 03:04:59,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:04:59,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-16 03:04:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-10-16 03:04:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 104 states have (on average 1.5192307692307692) internal successors, (158), 136 states have internal predecessors, (158), 0 states have call successors, (0), 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 03:04:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 158 transitions. [2021-10-16 03:04:59,573 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 158 transitions. Word has length 14 [2021-10-16 03:04:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:59,573 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 158 transitions. [2021-10-16 03:04:59,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 03:04:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 158 transitions. [2021-10-16 03:04:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 03:04:59,575 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:59,575 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:59,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:59,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:04:59,792 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:04:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:59,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1962503515, now seen corresponding path program 1 times [2021-10-16 03:04:59,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:59,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474473290] [2021-10-16 03:04:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:59,794 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:59,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:59,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:59,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 03:04:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:59,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 03:04:59,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:59,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:05:00,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-16 03:05:00,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:05:00,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-10-16 03:05:00,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-10-16 03:05:00,150 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 03:05:00,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:05:00,466 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 03:05:00,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:05:00,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474473290] [2021-10-16 03:05:00,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474473290] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:05:00,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:05:00,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 03:05:00,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852694278] [2021-10-16 03:05:00,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:05:00,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:05:00,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:05:00,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:05:00,469 INFO L87 Difference]: Start difference. First operand 137 states and 158 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 03:05:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:05:02,047 INFO L93 Difference]: Finished difference Result 136 states and 157 transitions. [2021-10-16 03:05:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 03:05:02,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 14 [2021-10-16 03:05:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:05:02,050 INFO L225 Difference]: With dead ends: 136 [2021-10-16 03:05:02,050 INFO L226 Difference]: Without dead ends: 136 [2021-10-16 03:05:02,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:05:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-16 03:05:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-10-16 03:05:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 104 states have (on average 1.5096153846153846) internal successors, (157), 135 states have internal predecessors, (157), 0 states have call successors, (0), 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 03:05:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 157 transitions. [2021-10-16 03:05:02,056 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 157 transitions. Word has length 14 [2021-10-16 03:05:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:05:02,057 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 157 transitions. [2021-10-16 03:05:02,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 03:05:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 157 transitions. [2021-10-16 03:05:02,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 03:05:02,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:05:02,059 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:05:02,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 03:05:02,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:05:02,259 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr71ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:05:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:05:02,260 INFO L82 PathProgramCache]: Analyzing trace with hash -498964277, now seen corresponding path program 1 times [2021-10-16 03:05:02,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:05:02,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129981905] [2021-10-16 03:05:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:05:02,261 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:05:02,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:05:02,264 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:05:02,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 03:05:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:05:02,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:05:02,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:05:02,503 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 03:05:02,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:05:02,579 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 03:05:02,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:05:02,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129981905] [2021-10-16 03:05:02,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129981905] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:05:02,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:05:02,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 03:05:02,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424151146] [2021-10-16 03:05:02,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:05:02,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:05:02,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:05:02,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:05:02,582 INFO L87 Difference]: Start difference. First operand 136 states and 157 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 03:05:03,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:05:03,020 INFO L93 Difference]: Finished difference Result 167 states and 186 transitions. [2021-10-16 03:05:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:05:03,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-10-16 03:05:03,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:05:03,023 INFO L225 Difference]: With dead ends: 167 [2021-10-16 03:05:03,023 INFO L226 Difference]: Without dead ends: 167 [2021-10-16 03:05:03,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:05:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-10-16 03:05:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 136. [2021-10-16 03:05:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 104 states have (on average 1.4903846153846154) internal successors, (155), 135 states have internal predecessors, (155), 0 states have call successors, (0), 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 03:05:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2021-10-16 03:05:03,040 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 16 [2021-10-16 03:05:03,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:05:03,041 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2021-10-16 03:05:03,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 03:05:03,041 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2021-10-16 03:05:03,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 03:05:03,045 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:05:03,045 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:05:03,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 03:05:03,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:05:03,258 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:05:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:05:03,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1434057178, now seen corresponding path program 1 times [2021-10-16 03:05:03,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:05:03,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582605863] [2021-10-16 03:05:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:05:03,260 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:05:03,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:05:03,262 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:05:03,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 03:05:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:05:03,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:05:03,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:05:03,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:05:03,611 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 03:05:03,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-10-16 03:05:03,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-16 03:05:03,882 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:05:03,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2021-10-16 03:05:04,014 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-16 03:05:04,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 35 [2021-10-16 03:05:04,140 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 03:05:04,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:05:06,242 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem10.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem10.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem10.base|) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10.offset|) c_ULTIMATE.start_main_~x~0.base)) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))))))) (_ bv1 1)))) is different from false [2021-10-16 03:05:08,347 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 03:05:08,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:05:08,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582605863] [2021-10-16 03:05:08,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582605863] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:05:08,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:05:08,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 6] imperfect sequences [] total 13 [2021-10-16 03:05:08,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015251853] [2021-10-16 03:05:08,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 03:05:08,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:05:08,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 03:05:08,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=118, Unknown=1, NotChecked=22, Total=182 [2021-10-16 03:05:08,349 INFO L87 Difference]: Start difference. First operand 136 states and 155 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 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 03:05:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:05:10,623 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2021-10-16 03:05:10,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 03:05:10,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 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 18 [2021-10-16 03:05:10,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:05:10,626 INFO L225 Difference]: With dead ends: 162 [2021-10-16 03:05:10,626 INFO L226 Difference]: Without dead ends: 162 [2021-10-16 03:05:10,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 4784.0ms TimeCoverageRelationStatistics Valid=132, Invalid=333, Unknown=1, NotChecked=40, Total=506 [2021-10-16 03:05:10,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-16 03:05:10,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 135. [2021-10-16 03:05:10,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 104 states have (on average 1.4807692307692308) internal successors, (154), 134 states have internal predecessors, (154), 0 states have call successors, (0), 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 03:05:10,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2021-10-16 03:05:10,632 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 18 [2021-10-16 03:05:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:05:10,632 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2021-10-16 03:05:10,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 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 03:05:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2021-10-16 03:05:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 03:05:10,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:05:10,634 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:05:10,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 03:05:10,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:05:10,844 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:05:10,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:05:10,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1434057177, now seen corresponding path program 1 times [2021-10-16 03:05:10,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:05:10,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192438171] [2021-10-16 03:05:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:05:10,846 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:05:10,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:05:10,846 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:05:10,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 03:05:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:05:11,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 03:05:11,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:05:11,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:05:11,163 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:05:11,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-16 03:05:11,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:05:11,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-16 03:05:11,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:05:11,425 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:05:11,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-10-16 03:05:11,451 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-16 03:05:11,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2021-10-16 03:05:11,624 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-16 03:05:11,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 42 [2021-10-16 03:05:11,634 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-16 03:05:11,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-10-16 03:05:11,730 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 03:05:11,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:05:24,420 WARN L207 SmtUtils]: Spent 6.14 s on a formula simplification that was a NOOP. DAG size: 26 [2021-10-16 03:05:35,728 WARN L207 SmtUtils]: Spent 7.11 s on a formula simplification that was a NOOP. DAG size: 27 [2021-10-16 03:05:35,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 03:05:35,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 03:05:36,057 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 03:05:36,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:05:36,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192438171] [2021-10-16 03:05:36,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192438171] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:05:36,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:05:36,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-10-16 03:05:36,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187793662] [2021-10-16 03:05:36,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 03:05:36,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:05:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 03:05:36,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=196, Unknown=1, NotChecked=0, Total=240 [2021-10-16 03:05:36,060 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 03:05:58,770 WARN L207 SmtUtils]: Spent 12.12 s on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-10-16 03:06:07,028 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))) (and (= (_ bv16 32) (select |c_#length| c_ULTIMATE.start_main_~x~0.base)) (forall ((|ULTIMATE.start_main_#t~mem10.offset| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem10.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem10.base|) .cse0 c_ULTIMATE.start_main_~x~0.offset)) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem10.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem10.base|) .cse0 c_ULTIMATE.start_main_~x~0.base)) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))))) (forall ((|ULTIMATE.start_main_#t~mem10.offset| (_ BitVec 32))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem10.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem10.base|) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10.offset|) c_ULTIMATE.start_main_~x~0.offset)) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) (_ bv0 32)) (not (= c_ULTIMATE.start_main_~x~0.base .cse2)) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~head~0.base))) (_ bv1 1))) (= (select |c_#length| .cse2) (_ bv16 32)) (exists ((|ULTIMATE.start_main_#t~mem10.offset| (_ BitVec 32))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset)) (.cse4 (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10.offset|))) (and (= (select (select |c_#memory_$Pointer$.base| .cse3) .cse4) c_ULTIMATE.start_main_~x~0.base) (= (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4) c_ULTIMATE.start_main_~x~0.offset)))) (= (_ bv0 32) c_ULTIMATE.start_main_~x~0.offset) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~x~0.base))) (_ bv1 1))))) is different from false [2021-10-16 03:06:12,634 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))) (and (= (_ bv16 32) (select |c_#length| c_ULTIMATE.start_main_~x~0.base)) (forall ((|ULTIMATE.start_main_#t~mem10.offset| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem10.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem10.base|) .cse0 c_ULTIMATE.start_main_~x~0.offset)) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem10.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem10.base|) .cse0 c_ULTIMATE.start_main_~x~0.base)) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))))) (forall ((|ULTIMATE.start_main_#t~mem10.offset| (_ BitVec 32))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem10.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem10.base|) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10.offset|) c_ULTIMATE.start_main_~x~0.offset)) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) (_ bv0 32)) (not (= c_ULTIMATE.start_main_~x~0.base .cse2)) (= (select |c_#length| .cse2) (_ bv16 32)) (exists ((|ULTIMATE.start_main_#t~mem10.offset| (_ BitVec 32))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset)) (.cse4 (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10.offset|))) (and (= (select (select |c_#memory_$Pointer$.base| .cse3) .cse4) c_ULTIMATE.start_main_~x~0.base) (= (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4) c_ULTIMATE.start_main_~x~0.offset)))) (= (_ bv0 32) c_ULTIMATE.start_main_~x~0.offset) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~x~0.base))) (_ bv1 1))))) is different from false [2021-10-16 03:06:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:06:12,713 INFO L93 Difference]: Finished difference Result 214 states and 245 transitions. [2021-10-16 03:06:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-16 03:06:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 18 [2021-10-16 03:06:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:06:12,715 INFO L225 Difference]: With dead ends: 214 [2021-10-16 03:06:12,716 INFO L226 Difference]: Without dead ends: 214 [2021-10-16 03:06:12,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 57396.9ms TimeCoverageRelationStatistics Valid=353, Invalid=1128, Unknown=9, NotChecked=150, Total=1640 [2021-10-16 03:06:12,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-10-16 03:06:12,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 127. [2021-10-16 03:06:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 104 states have (on average 1.4038461538461537) internal successors, (146), 126 states have internal predecessors, (146), 0 states have call successors, (0), 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 03:06:12,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2021-10-16 03:06:12,723 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 18 [2021-10-16 03:06:12,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:06:12,723 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2021-10-16 03:06:12,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 03:06:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2021-10-16 03:06:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 03:06:12,725 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:06:12,725 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:06:12,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 03:06:12,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:06:12,949 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:06:12,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:06:12,949 INFO L82 PathProgramCache]: Analyzing trace with hash -822008851, now seen corresponding path program 1 times [2021-10-16 03:06:12,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:06:12,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150663390] [2021-10-16 03:06:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:06:12,950 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:06:12,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:06:12,951 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:06:12,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 03:06:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:06:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:06:13,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:06:13,187 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 03:06:13,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:06:13,240 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 03:06:13,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:06:13,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150663390] [2021-10-16 03:06:13,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150663390] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:06:13,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:06:13,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 03:06:13,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463869752] [2021-10-16 03:06:13,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:06:13,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:06:13,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:06:13,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:06:13,243 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 03:06:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:06:13,277 INFO L93 Difference]: Finished difference Result 153 states and 180 transitions. [2021-10-16 03:06:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:06:13,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-10-16 03:06:13,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:06:13,288 INFO L225 Difference]: With dead ends: 153 [2021-10-16 03:06:13,288 INFO L226 Difference]: Without dead ends: 153 [2021-10-16 03:06:13,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:06:13,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-16 03:06:13,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 131. [2021-10-16 03:06:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 108 states have (on average 1.3888888888888888) internal successors, (150), 130 states have internal predecessors, (150), 0 states have call successors, (0), 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 03:06:13,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2021-10-16 03:06:13,294 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 19 [2021-10-16 03:06:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:06:13,294 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2021-10-16 03:06:13,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 03:06:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2021-10-16 03:06:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 03:06:13,296 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:06:13,296 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 03:06:13,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 03:06:13,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:06:13,508 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:06:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:06:13,509 INFO L82 PathProgramCache]: Analyzing trace with hash -913566102, now seen corresponding path program 1 times [2021-10-16 03:06:13,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:06:13,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73076688] [2021-10-16 03:06:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:06:13,510 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:06:13,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:06:13,512 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:06:13,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 03:06:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:06:13,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:06:13,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:06:13,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:06:13,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:06:13,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-16 03:06:13,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-16 03:06:14,107 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 03:06:14,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:06:14,376 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 03:06:14,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:06:14,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73076688] [2021-10-16 03:06:14,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73076688] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:06:14,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:06:14,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 11 [2021-10-16 03:06:14,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532555841] [2021-10-16 03:06:14,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:06:14,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:06:14,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:06:14,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:06:14,379 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 03:06:16,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:06:16,674 INFO L93 Difference]: Finished difference Result 265 states and 308 transitions. [2021-10-16 03:06:16,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 03:06:16,675 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 21 [2021-10-16 03:06:16,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:06:16,677 INFO L225 Difference]: With dead ends: 265 [2021-10-16 03:06:16,677 INFO L226 Difference]: Without dead ends: 265 [2021-10-16 03:06:16,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 781.4ms TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-10-16 03:06:16,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-10-16 03:06:16,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 181. [2021-10-16 03:06:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 158 states have (on average 1.3987341772151898) internal successors, (221), 180 states have internal predecessors, (221), 0 states have call successors, (0), 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 03:06:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 221 transitions. [2021-10-16 03:06:16,685 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 221 transitions. Word has length 21 [2021-10-16 03:06:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:06:16,686 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 221 transitions. [2021-10-16 03:06:16,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 03:06:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 221 transitions. [2021-10-16 03:06:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 03:06:16,687 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:06:16,688 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 03:06:16,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-16 03:06:16,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:06:16,902 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:06:16,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:06:16,902 INFO L82 PathProgramCache]: Analyzing trace with hash 332100342, now seen corresponding path program 1 times [2021-10-16 03:06:16,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:06:16,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479064435] [2021-10-16 03:06:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:06:16,903 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:06:16,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:06:16,904 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:06:16,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 03:06:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:06:17,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:06:17,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:06:17,189 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 03:06:17,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:06:17,239 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 03:06:17,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:06:17,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479064435] [2021-10-16 03:06:17,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479064435] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:06:17,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:06:17,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-16 03:06:17,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975957724] [2021-10-16 03:06:17,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:06:17,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:06:17,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:06:17,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:06:17,241 INFO L87 Difference]: Start difference. First operand 181 states and 221 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 03:06:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:06:17,321 INFO L93 Difference]: Finished difference Result 220 states and 268 transitions. [2021-10-16 03:06:17,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 03:06:17,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 03:06:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:06:17,326 INFO L225 Difference]: With dead ends: 220 [2021-10-16 03:06:17,327 INFO L226 Difference]: Without dead ends: 220 [2021-10-16 03:06:17,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:06:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-10-16 03:06:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 187. [2021-10-16 03:06:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 164 states have (on average 1.3780487804878048) internal successors, (226), 186 states have internal predecessors, (226), 0 states have call successors, (0), 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 03:06:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 226 transitions. [2021-10-16 03:06:17,334 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 226 transitions. Word has length 21 [2021-10-16 03:06:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:06:17,334 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 226 transitions. [2021-10-16 03:06:17,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 03:06:17,335 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 226 transitions. [2021-10-16 03:06:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 03:06:17,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:06:17,336 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 03:06:17,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-16 03:06:17,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:06:17,550 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:06:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:06:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1322487899, now seen corresponding path program 1 times [2021-10-16 03:06:17,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:06:17,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545635469] [2021-10-16 03:06:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:06:17,551 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:06:17,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:06:17,552 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:06:17,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 03:06:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:06:17,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 03:06:17,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:06:17,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:06:17,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:06:18,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-16 03:06:18,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-16 03:06:18,237 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 03:06:18,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:06:18,553 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 03:06:18,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:06:18,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545635469] [2021-10-16 03:06:18,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545635469] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:06:18,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:06:18,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 10 [2021-10-16 03:06:18,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906349867] [2021-10-16 03:06:18,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:06:18,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:06:18,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:06:18,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:06:18,556 INFO L87 Difference]: Start difference. First operand 187 states and 226 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:06:20,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:06:20,167 INFO L93 Difference]: Finished difference Result 231 states and 259 transitions. [2021-10-16 03:06:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 03:06:20,167 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-16 03:06:20,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:06:20,169 INFO L225 Difference]: With dead ends: 231 [2021-10-16 03:06:20,170 INFO L226 Difference]: Without dead ends: 231 [2021-10-16 03:06:20,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 445.2ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-10-16 03:06:20,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-10-16 03:06:20,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 190. [2021-10-16 03:06:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 167 states have (on average 1.3652694610778444) internal successors, (228), 189 states have internal predecessors, (228), 0 states have call successors, (0), 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 03:06:20,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 228 transitions. [2021-10-16 03:06:20,178 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 228 transitions. Word has length 23 [2021-10-16 03:06:20,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:06:20,179 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 228 transitions. [2021-10-16 03:06:20,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:06:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 228 transitions. [2021-10-16 03:06:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 03:06:20,180 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:06:20,180 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:06:20,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-16 03:06:20,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:06:20,394 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:06:20,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:06:20,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1609197774, now seen corresponding path program 1 times [2021-10-16 03:06:20,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:06:20,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052693686] [2021-10-16 03:06:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:06:20,395 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:06:20,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:06:20,397 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:06:20,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 03:06:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:06:20,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:06:20,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:06:20,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:06:20,770 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 03:06:20,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-10-16 03:06:20,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-10-16 03:06:21,113 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-16 03:06:21,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 33 [2021-10-16 03:06:21,877 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-16 03:06:21,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 50 [2021-10-16 03:06:21,971 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 03:06:21,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:06:30,303 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem6.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv8 32)))) (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~head~0.base) .cse1))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) |ULTIMATE.start_main_#t~mem6.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~head~0.base) .cse1))))) (_ bv1 1)))) is different from false [2021-10-16 03:06:30,515 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 03:06:30,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:06:30,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052693686] [2021-10-16 03:06:30,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052693686] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:06:30,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:06:30,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-10-16 03:06:30,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470568229] [2021-10-16 03:06:30,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 03:06:30,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:06:30,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 03:06:30,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=164, Unknown=2, NotChecked=26, Total=240 [2021-10-16 03:06:30,518 INFO L87 Difference]: Start difference. First operand 190 states and 228 transitions. Second operand has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 16 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 03:06:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:06:37,311 INFO L93 Difference]: Finished difference Result 326 states and 365 transitions. [2021-10-16 03:06:37,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:06:37,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 16 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 25 [2021-10-16 03:06:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:06:37,315 INFO L225 Difference]: With dead ends: 326 [2021-10-16 03:06:37,315 INFO L226 Difference]: Without dead ends: 326 [2021-10-16 03:06:37,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 11493.2ms TimeCoverageRelationStatistics Valid=159, Invalid=544, Unknown=3, NotChecked=50, Total=756 [2021-10-16 03:06:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-10-16 03:06:37,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 202. [2021-10-16 03:06:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 179 states have (on average 1.3631284916201116) internal successors, (244), 201 states have internal predecessors, (244), 0 states have call successors, (0), 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 03:06:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 244 transitions. [2021-10-16 03:06:37,323 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 244 transitions. Word has length 25 [2021-10-16 03:06:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:06:37,324 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 244 transitions. [2021-10-16 03:06:37,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 16 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 03:06:37,324 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 244 transitions. [2021-10-16 03:06:37,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 03:06:37,328 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:06:37,329 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:06:37,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 03:06:37,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:06:37,543 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:06:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:06:37,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1609197773, now seen corresponding path program 1 times [2021-10-16 03:06:37,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:06:37,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405034134] [2021-10-16 03:06:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:06:37,545 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:06:37,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:06:37,546 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:06:37,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 03:06:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:06:37,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 03:06:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:06:37,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:06:37,964 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:06:37,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-16 03:06:37,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:06:38,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:06:38,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-16 03:06:38,194 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-16 03:06:38,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-10-16 03:06:38,228 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-16 03:06:38,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 60 [2021-10-16 03:06:38,915 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-16 03:06:38,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 44 [2021-10-16 03:06:38,926 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-16 03:06:38,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-10-16 03:06:38,978 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 03:06:38,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:06:46,985 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse0 (let ((.cse2 (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv8 32)))) (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~head~0.base) .cse2))) (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) |ULTIMATE.start_main_#t~mem6.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~head~0.base) .cse2)))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((|ULTIMATE.start_main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse4 (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv8 32)))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~head~0.base) .cse4))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) |ULTIMATE.start_main_#t~mem6.offset| (_ bv0 32))) c_ULTIMATE.start_main_~head~0.base) .cse4)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |ULTIMATE.start_main_#t~mem6.offset| (_ bv0 32))) c_ULTIMATE.start_main_~head~0.base) .cse4))))))) is different from false [2021-10-16 03:06:47,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-10-16 03:06:47,488 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 03:06:47,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:06:47,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405034134] [2021-10-16 03:06:47,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405034134] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:06:47,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:06:47,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-10-16 03:06:47,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460414526] [2021-10-16 03:06:47,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 03:06:47,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:06:47,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 03:06:47,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=173, Unknown=1, NotChecked=26, Total=240 [2021-10-16 03:06:47,492 INFO L87 Difference]: Start difference. First operand 202 states and 244 transitions. Second operand has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 16 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 03:07:00,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:07:00,218 INFO L93 Difference]: Finished difference Result 302 states and 353 transitions. [2021-10-16 03:07:00,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:07:00,219 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 16 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 25 [2021-10-16 03:07:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:07:00,221 INFO L225 Difference]: With dead ends: 302 [2021-10-16 03:07:00,221 INFO L226 Difference]: Without dead ends: 302 [2021-10-16 03:07:00,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 13332.9ms TimeCoverageRelationStatistics Valid=151, Invalid=554, Unknown=1, NotChecked=50, Total=756 [2021-10-16 03:07:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-10-16 03:07:00,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 202. [2021-10-16 03:07:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 179 states have (on average 1.3575418994413408) internal successors, (243), 201 states have internal predecessors, (243), 0 states have call successors, (0), 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 03:07:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 243 transitions. [2021-10-16 03:07:00,233 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 243 transitions. Word has length 25 [2021-10-16 03:07:00,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:07:00,234 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 243 transitions. [2021-10-16 03:07:00,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 16 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 03:07:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 243 transitions. [2021-10-16 03:07:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 03:07:00,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:07:00,235 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:07:00,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-16 03:07:00,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:07:00,444 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:07:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:07:00,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1346931026, now seen corresponding path program 1 times [2021-10-16 03:07:00,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:07:00,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492394624] [2021-10-16 03:07:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:07:00,446 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:07:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:07:00,447 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:07:00,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 03:07:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:07:00,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:07:00,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:07:00,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:07:00,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-16 03:07:00,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-10-16 03:07:00,940 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 03:07:00,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:07:01,018 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 03:07:01,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:07:01,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492394624] [2021-10-16 03:07:01,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492394624] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:07:01,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:07:01,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 03:07:01,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104249128] [2021-10-16 03:07:01,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:07:01,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:07:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:07:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:07:01,021 INFO L87 Difference]: Start difference. First operand 202 states and 243 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 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 03:07:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:07:01,717 INFO L93 Difference]: Finished difference Result 210 states and 252 transitions. [2021-10-16 03:07:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 03:07:01,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 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 03:07:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:07:01,718 INFO L225 Difference]: With dead ends: 210 [2021-10-16 03:07:01,719 INFO L226 Difference]: Without dead ends: 210 [2021-10-16 03:07:01,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:07:01,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-10-16 03:07:01,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 201. [2021-10-16 03:07:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 179 states have (on average 1.3519553072625698) internal successors, (242), 200 states have internal predecessors, (242), 0 states have call successors, (0), 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 03:07:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 242 transitions. [2021-10-16 03:07:01,725 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 242 transitions. Word has length 25 [2021-10-16 03:07:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:07:01,725 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 242 transitions. [2021-10-16 03:07:01,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 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 03:07:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 242 transitions. [2021-10-16 03:07:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 03:07:01,727 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:07:01,727 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:07:01,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-16 03:07:01,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:07:01,940 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:07:01,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:07:01,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1346931027, now seen corresponding path program 1 times [2021-10-16 03:07:01,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:07:01,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198773005] [2021-10-16 03:07:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:07:01,942 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:07:01,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:07:01,942 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:07:01,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-16 03:07:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:07:02,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 03:07:02,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:07:02,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:07:02,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:07:02,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-16 03:07:02,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-10-16 03:07:02,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-10-16 03:07:02,511 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 03:07:02,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:07:02,858 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 03:07:02,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:07:02,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198773005] [2021-10-16 03:07:02,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198773005] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:07:02,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:07:02,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 03:07:02,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916282716] [2021-10-16 03:07:02,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:07:02,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:07:02,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:07:02,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:07:02,861 INFO L87 Difference]: Start difference. First operand 201 states and 242 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 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 03:07:04,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:07:04,470 INFO L93 Difference]: Finished difference Result 200 states and 241 transitions. [2021-10-16 03:07:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 03:07:04,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 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 03:07:04,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:07:04,473 INFO L225 Difference]: With dead ends: 200 [2021-10-16 03:07:04,473 INFO L226 Difference]: Without dead ends: 200 [2021-10-16 03:07:04,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 332.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:07:04,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-16 03:07:04,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-10-16 03:07:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 179 states have (on average 1.3463687150837989) internal successors, (241), 199 states have internal predecessors, (241), 0 states have call successors, (0), 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 03:07:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 241 transitions. [2021-10-16 03:07:04,481 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 241 transitions. Word has length 25 [2021-10-16 03:07:04,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:07:04,481 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 241 transitions. [2021-10-16 03:07:04,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 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 03:07:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 241 transitions. [2021-10-16 03:07:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 03:07:04,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:07:04,484 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 03:07:04,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-16 03:07:04,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:07:04,696 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:07:04,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:07:04,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1459618013, now seen corresponding path program 1 times [2021-10-16 03:07:04,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:07:04,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518209905] [2021-10-16 03:07:04,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:07:04,697 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:07:04,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:07:04,698 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:07:04,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 03:07:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:07:05,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 03:07:05,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:07:05,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:07:05,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:07:05,223 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:07:05,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-16 03:07:05,286 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-10-16 03:07:05,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-10-16 03:07:05,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-16 03:07:05,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-10-16 03:07:05,473 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-16 03:07:05,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-10-16 03:07:05,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-16 03:07:05,644 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 03:07:05,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:07:05,721 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:05,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-16 03:07:07,738 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem6.offset| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~mem6.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_#t~mem6.base|) |ULTIMATE.start_main_#t~mem6.offset| v_DerPreprocessor_1)) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv12 32))) (_ bv2 32))) is different from false [2021-10-16 03:07:09,752 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem6.offset| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32))) (= (_ bv2 32) (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv8 32))))) (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) |ULTIMATE.start_main_#t~mem6.offset| v_DerPreprocessor_1))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv12 32))))) is different from false [2021-10-16 03:07:09,784 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:09,785 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-10-16 03:07:11,798 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem6.offset| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32))) (= (_ bv2 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv8 32)) v_DerPreprocessor_2)))) (store .cse0 |c_ULTIMATE.start_main_#t~malloc5.base| (store (select .cse0 |c_ULTIMATE.start_main_#t~malloc5.base|) |ULTIMATE.start_main_#t~mem6.offset| v_DerPreprocessor_1))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv12 32))))) is different from false [2021-10-16 03:07:13,842 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc5.base_22| (_ BitVec 32))) (or (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem6.offset| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32))) (= (_ bv2 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv8 32)) v_DerPreprocessor_2)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc5.base_22| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc5.base_22|) |ULTIMATE.start_main_#t~mem6.offset| v_DerPreprocessor_1))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv12 32))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc5.base_22|))))) is different from false [2021-10-16 03:07:13,891 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 03:07:13,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:07:13,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518209905] [2021-10-16 03:07:13,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518209905] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:07:13,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:07:13,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 15 [2021-10-16 03:07:13,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693314391] [2021-10-16 03:07:13,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-16 03:07:13,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:07:13,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-16 03:07:13,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=90, Unknown=4, NotChecked=84, Total=210 [2021-10-16 03:07:13,894 INFO L87 Difference]: Start difference. First operand 200 states and 241 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:07:24,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:07:24,267 INFO L93 Difference]: Finished difference Result 281 states and 325 transitions. [2021-10-16 03:07:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 03:07:24,268 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-16 03:07:24,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:07:24,269 INFO L225 Difference]: With dead ends: 281 [2021-10-16 03:07:24,269 INFO L226 Difference]: Without dead ends: 281 [2021-10-16 03:07:24,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 16749.8ms TimeCoverageRelationStatistics Valid=120, Invalid=354, Unknown=4, NotChecked=172, Total=650 [2021-10-16 03:07:24,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-10-16 03:07:24,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 200. [2021-10-16 03:07:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 179 states have (on average 1.3407821229050279) internal successors, (240), 199 states have internal predecessors, (240), 0 states have call successors, (0), 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 03:07:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 240 transitions. [2021-10-16 03:07:24,273 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 240 transitions. Word has length 27 [2021-10-16 03:07:24,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:07:24,274 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 240 transitions. [2021-10-16 03:07:24,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:07:24,277 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 240 transitions. [2021-10-16 03:07:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 03:07:24,277 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:07:24,277 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, 1, 1] [2021-10-16 03:07:24,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 03:07:24,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:07:24,478 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:07:24,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:07:24,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1491473498, now seen corresponding path program 1 times [2021-10-16 03:07:24,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:07:24,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309677119] [2021-10-16 03:07:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:07:24,479 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:07:24,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:07:24,481 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:07:24,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-16 03:07:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:07:24,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 03:07:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:07:24,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:07:24,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:07:24,951 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-16 03:07:24,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:07:24,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:24,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:07:25,123 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-16 03:07:25,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-10-16 03:07:25,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:25,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:25,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:25,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-16 03:07:25,227 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-10-16 03:07:25,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 03:07:25,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:25,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:25,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:25,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 03:07:26,079 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-16 03:07:26,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 45 [2021-10-16 03:07:26,088 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-16 03:07:26,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2021-10-16 03:07:26,170 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 03:07:26,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:07:26,401 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:26,402 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-16 03:07:26,404 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:26,405 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-16 03:07:26,465 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 03:07:26,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:07:26,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309677119] [2021-10-16 03:07:26,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309677119] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:07:26,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1877552635] [2021-10-16 03:07:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:07:26,466 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:07:26,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:07:26,468 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:07:26,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-16 03:07:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:07:27,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 03:07:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:07:27,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:07:27,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:07:27,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:07:27,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:07:27,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:27,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-10-16 03:07:27,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-16 03:07:27,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:27,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 03:07:27,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:27,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 03:07:28,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:28,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2021-10-16 03:07:28,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:28,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 16 [2021-10-16 03:07:28,246 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 03:07:28,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:07:28,472 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:28,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-16 03:07:28,477 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:28,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-16 03:07:28,532 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 03:07:28,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1877552635] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:07:28,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492377400] [2021-10-16 03:07:28,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:07:28,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:07:28,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:07:28,534 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:07:28,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-16 03:07:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:07:29,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 03:07:29,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:07:29,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:07:29,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:07:29,105 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-16 03:07:29,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:07:29,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:29,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:07:29,226 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-16 03:07:29,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-10-16 03:07:29,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:29,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:29,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:29,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-16 03:07:29,335 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-10-16 03:07:29,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 03:07:29,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:29,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:29,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:29,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 03:07:30,138 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-16 03:07:30,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 45 [2021-10-16 03:07:30,158 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-16 03:07:30,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2021-10-16 03:07:30,183 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 03:07:30,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:07:30,420 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:30,421 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-16 03:07:30,423 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:30,424 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-16 03:07:30,499 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 03:07:30,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492377400] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:07:30,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:07:30,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 9, 6, 8, 6] total 14 [2021-10-16 03:07:30,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945302577] [2021-10-16 03:07:30,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 03:07:30,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:07:30,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 03:07:30,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-16 03:07:30,501 INFO L87 Difference]: Start difference. First operand 200 states and 240 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 03:07:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:07:32,548 INFO L93 Difference]: Finished difference Result 235 states and 263 transitions. [2021-10-16 03:07:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 03:07:32,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 03:07:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:07:32,550 INFO L225 Difference]: With dead ends: 235 [2021-10-16 03:07:32,550 INFO L226 Difference]: Without dead ends: 235 [2021-10-16 03:07:32,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 135 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 874.5ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-10-16 03:07:32,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-10-16 03:07:32,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 191. [2021-10-16 03:07:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 170 states have (on average 1.2941176470588236) internal successors, (220), 190 states have internal predecessors, (220), 0 states have call successors, (0), 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 03:07:32,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 220 transitions. [2021-10-16 03:07:32,557 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 220 transitions. Word has length 27 [2021-10-16 03:07:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:07:32,558 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 220 transitions. [2021-10-16 03:07:32,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 03:07:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 220 transitions. [2021-10-16 03:07:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 03:07:32,559 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:07:32,559 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 03:07:32,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-16 03:07:32,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-16 03:07:32,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-10-16 03:07:33,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:07:33,173 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:07:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:07:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash -834479840, now seen corresponding path program 1 times [2021-10-16 03:07:33,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:07:33,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96478206] [2021-10-16 03:07:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:07:33,174 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:07:33,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:07:33,176 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:07:33,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-16 03:07:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:07:33,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 03:07:33,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:07:34,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-16 03:07:34,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-16 03:07:34,498 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 03:07:34,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:07:34,850 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 03:07:34,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:07:34,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96478206] [2021-10-16 03:07:34,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96478206] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:07:34,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:07:34,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 8] imperfect sequences [] total 15 [2021-10-16 03:07:34,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103659801] [2021-10-16 03:07:34,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-16 03:07:34,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:07:34,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-16 03:07:34,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-16 03:07:34,853 INFO L87 Difference]: Start difference. First operand 191 states and 220 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 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 03:07:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:07:39,782 INFO L93 Difference]: Finished difference Result 260 states and 289 transitions. [2021-10-16 03:07:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:07:39,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 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 03:07:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:07:39,785 INFO L225 Difference]: With dead ends: 260 [2021-10-16 03:07:39,785 INFO L226 Difference]: Without dead ends: 260 [2021-10-16 03:07:39,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1460.3ms TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2021-10-16 03:07:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-16 03:07:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 185. [2021-10-16 03:07:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 164 states have (on average 1.3048780487804879) internal successors, (214), 184 states have internal predecessors, (214), 0 states have call successors, (0), 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 03:07:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 214 transitions. [2021-10-16 03:07:39,792 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 214 transitions. Word has length 29 [2021-10-16 03:07:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:07:39,792 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 214 transitions. [2021-10-16 03:07:39,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 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 03:07:39,793 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 214 transitions. [2021-10-16 03:07:39,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-16 03:07:39,793 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:07:39,794 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:07:39,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-16 03:07:40,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:07:40,007 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:07:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:07:40,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1955979153, now seen corresponding path program 1 times [2021-10-16 03:07:40,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:07:40,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061171363] [2021-10-16 03:07:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:07:40,008 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:07:40,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:07:40,010 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:07:40,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-16 03:07:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:07:40,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 03:07:40,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:07:40,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:07:40,795 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:07:40,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-16 03:07:40,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-16 03:07:40,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:07:40,956 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-16 03:07:40,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 47 [2021-10-16 03:07:40,984 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-16 03:07:40,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 49 [2021-10-16 03:07:41,532 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-16 03:07:41,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 40 [2021-10-16 03:07:41,540 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-16 03:07:41,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 17 [2021-10-16 03:07:41,696 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 03:07:41,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:07:42,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:42,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1025 treesize of output 881 [2021-10-16 03:07:42,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 03:07:42,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 589 treesize of output 513 [2021-10-16 03:07:42,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 03:07:42,834 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 03:07:42,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:07:42,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061171363] [2021-10-16 03:07:42,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061171363] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:07:42,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:07:42,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 17 [2021-10-16 03:07:42,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570108415] [2021-10-16 03:07:42,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-16 03:07:42,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:07:42,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-16 03:07:42,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-10-16 03:07:42,841 INFO L87 Difference]: Start difference. First operand 185 states and 214 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:07:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:07:47,465 INFO L93 Difference]: Finished difference Result 229 states and 255 transitions. [2021-10-16 03:07:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 03:07:47,466 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-16 03:07:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:07:47,467 INFO L225 Difference]: With dead ends: 229 [2021-10-16 03:07:47,467 INFO L226 Difference]: Without dead ends: 229 [2021-10-16 03:07:47,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1848.0ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-10-16 03:07:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-10-16 03:07:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 182. [2021-10-16 03:07:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 161 states have (on average 1.2981366459627328) internal successors, (209), 181 states have internal predecessors, (209), 0 states have call successors, (0), 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 03:07:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 209 transitions. [2021-10-16 03:07:47,473 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 209 transitions. Word has length 32 [2021-10-16 03:07:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:07:47,473 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 209 transitions. [2021-10-16 03:07:47,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:07:47,474 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 209 transitions. [2021-10-16 03:07:47,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-16 03:07:47,475 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:07:47,475 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:07:47,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-16 03:07:47,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:07:47,688 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:07:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:07:47,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1694086802, now seen corresponding path program 1 times [2021-10-16 03:07:47,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:07:47,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518700165] [2021-10-16 03:07:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:07:47,690 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:07:47,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:07:47,700 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:07:47,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-16 03:07:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:07:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 03:07:48,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:07:48,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-10-16 03:07:48,641 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 03:07:48,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:07:48,848 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-10-16 03:07:48,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2021-10-16 03:07:48,881 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 03:07:48,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:07:48,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518700165] [2021-10-16 03:07:48,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518700165] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:07:48,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1090731355] [2021-10-16 03:07:48,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:07:48,882 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:07:48,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:07:48,884 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:07:48,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-16 03:07:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:07:49,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:07:49,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:07:49,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:07:50,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-16 03:07:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:07:50,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:07:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:07:50,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1090731355] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:07:50,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-16 03:07:50,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8, 8] total 16 [2021-10-16 03:07:50,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353751449] [2021-10-16 03:07:50,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:07:50,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:07:50,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:07:50,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-10-16 03:07:50,466 INFO L87 Difference]: Start difference. First operand 182 states and 209 transitions. Second operand has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 03:07:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:07:51,502 INFO L93 Difference]: Finished difference Result 228 states and 259 transitions. [2021-10-16 03:07:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 03:07:51,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 03:07:51,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:07:51,504 INFO L225 Difference]: With dead ends: 228 [2021-10-16 03:07:51,505 INFO L226 Difference]: Without dead ends: 228 [2021-10-16 03:07:51,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 453.9ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-10-16 03:07:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-10-16 03:07:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 199. [2021-10-16 03:07:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 178 states have (on average 1.2752808988764044) internal successors, (227), 198 states have internal predecessors, (227), 0 states have call successors, (0), 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 03:07:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 227 transitions. [2021-10-16 03:07:51,509 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 227 transitions. Word has length 34 [2021-10-16 03:07:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:07:51,510 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 227 transitions. [2021-10-16 03:07:51,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 03:07:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 227 transitions. [2021-10-16 03:07:51,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-16 03:07:51,511 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:07:51,511 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:07:51,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-10-16 03:07:51,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-16 03:07:51,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:07:51,929 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:07:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:07:51,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1694075817, now seen corresponding path program 1 times [2021-10-16 03:07:51,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:07:51,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575317836] [2021-10-16 03:07:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:07:51,930 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:07:51,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:07:51,931 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:07:51,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-16 03:07:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:07:52,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 03:07:52,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:07:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:07:52,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:07:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:07:53,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:07:53,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575317836] [2021-10-16 03:07:53,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575317836] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:07:53,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:07:53,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-16 03:07:53,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004387327] [2021-10-16 03:07:53,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 03:07:53,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:07:53,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 03:07:53,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:07:53,162 INFO L87 Difference]: Start difference. First operand 199 states and 227 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 03:07:53,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:07:53,867 INFO L93 Difference]: Finished difference Result 222 states and 245 transitions. [2021-10-16 03:07:53,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 03:07:53,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 03:07:53,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:07:53,874 INFO L225 Difference]: With dead ends: 222 [2021-10-16 03:07:53,874 INFO L226 Difference]: Without dead ends: 222 [2021-10-16 03:07:53,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:07:53,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-10-16 03:07:53,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 201. [2021-10-16 03:07:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 180 states have (on average 1.2722222222222221) internal successors, (229), 200 states have internal predecessors, (229), 0 states have call successors, (0), 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 03:07:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 229 transitions. [2021-10-16 03:07:53,881 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 229 transitions. Word has length 34 [2021-10-16 03:07:53,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:07:53,882 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 229 transitions. [2021-10-16 03:07:53,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 03:07:53,882 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 229 transitions. [2021-10-16 03:07:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-16 03:07:53,883 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:07:53,883 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:07:53,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-16 03:07:54,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:07:54,100 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 03:07:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:07:54,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1837503706, now seen corresponding path program 1 times [2021-10-16 03:07:54,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:07:54,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152756197] [2021-10-16 03:07:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:07:54,101 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:07:54,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:07:54,102 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:07:54,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-16 03:07:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:07:55,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-16 03:07:55,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:07:55,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:07:55,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:07:55,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:55,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-16 03:07:55,298 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:07:55,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-16 03:07:55,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-16 03:07:55,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:55,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-16 03:07:55,627 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:07:55,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 52 [2021-10-16 03:07:55,661 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-16 03:07:55,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 34 [2021-10-16 03:07:55,776 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-16 03:07:55,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 14 [2021-10-16 03:07:55,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-16 03:07:55,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-16 03:07:56,036 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-16 03:07:56,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 29 [2021-10-16 03:07:56,286 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-16 03:07:56,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 14 [2021-10-16 03:07:56,415 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 03:07:56,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:07:56,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:56,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:07:56,942 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:56,943 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-10-16 03:08:35,052 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:08:35,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-10-16 03:08:37,081 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem10.offset| (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_107 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (not (= (_ bv2 32) (select (select (let ((.cse2 (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10.offset|))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~mem10.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_#t~mem10.base|) .cse2 v_DerPreprocessor_11))) (.cse1 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem10.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem10.base|) .cse2 c_ULTIMATE.start_main_~x~0.base)) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))) (store .cse0 .cse1 (store (store (store (select .cse0 .cse1) v_ULTIMATE.start_main_~x~0.offset_107 v_DerPreprocessor_10) (bvadd (_ bv12 32) v_ULTIMATE.start_main_~x~0.offset_107) (_ bv1 32)) (bvadd (_ bv8 32) v_ULTIMATE.start_main_~x~0.offset_107) v_DerPreprocessor_9)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv12 32)))))) is different from false [2021-10-16 03:08:39,148 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem10.offset| (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_107 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (not (= (_ bv2 32) (select (select (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset)) (.cse3 (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10.offset|))) (let ((.cse0 (store |c_#memory_int| .cse2 (store (select |c_#memory_int| .cse2) .cse3 v_DerPreprocessor_11))) (.cse1 (select (select (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) .cse3 c_ULTIMATE.start_main_~x~0.base)) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))) (store .cse0 .cse1 (store (store (store (select .cse0 .cse1) v_ULTIMATE.start_main_~x~0.offset_107 v_DerPreprocessor_10) (bvadd (_ bv12 32) v_ULTIMATE.start_main_~x~0.offset_107) (_ bv1 32)) (bvadd (_ bv8 32) v_ULTIMATE.start_main_~x~0.offset_107) v_DerPreprocessor_9)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv12 32)))))) is different from false [2021-10-16 03:08:39,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:08:39,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 151 [2021-10-16 03:08:58,253 WARN L207 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 54 [2021-10-16 03:09:48,929 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:09:48,931 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-16 03:09:49,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:09:49,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152756197] [2021-10-16 03:09:49,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_DerPreprocessor_12 [2021-10-16 03:09:49,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [793912007] [2021-10-16 03:09:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:49,361 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:09:49,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:09:49,363 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:09:49,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-10-16 03:09:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:50,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-16 03:09:50,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:09:50,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:09:50,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:09:50,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:09:50,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-16 03:09:50,629 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:09:50,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-16 03:09:50,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-16 03:09:50,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:09:50,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-16 03:09:50,820 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:09:50,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 52 [2021-10-16 03:09:50,849 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-16 03:09:50,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 34 [2021-10-16 03:09:50,921 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-16 03:09:50,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 14 [2021-10-16 03:09:50,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-16 03:09:51,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-16 03:09:51,138 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-16 03:09:51,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 29 [2021-10-16 03:09:51,384 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-16 03:09:51,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 14 [2021-10-16 03:09:51,416 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 03:09:51,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:09:51,489 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:09:51,490 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:09:51,650 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:09:51,650 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-10-16 03:10:07,846 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:07,847 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-10-16 03:10:51,810 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem10.offset| (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_107 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (not (= (_ bv2 32) (select (select (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset)) (.cse3 (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10.offset|))) (let ((.cse0 (store |c_#memory_int| .cse2 (store (select |c_#memory_int| .cse2) .cse3 v_DerPreprocessor_16))) (.cse1 (select (select (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) .cse3 c_ULTIMATE.start_main_~x~0.base)) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))) (store .cse0 .cse1 (store (store (store (select .cse0 .cse1) v_ULTIMATE.start_main_~x~0.offset_107 v_DerPreprocessor_10) (bvadd (_ bv12 32) v_ULTIMATE.start_main_~x~0.offset_107) (_ bv1 32)) (bvadd (_ bv8 32) v_ULTIMATE.start_main_~x~0.offset_107) v_DerPreprocessor_9)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv12 32)))))) is different from false [2021-10-16 03:10:51,929 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:51,930 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 151 [2021-10-16 03:11:38,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:38,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-16 03:11:39,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_DerPreprocessor_12 [2021-10-16 03:11:39,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933201182] [2021-10-16 03:11:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:39,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:11:39,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:11:39,706 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:11:39,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-16 03:11:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:40,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 03:11:40,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:40,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:11:40,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:11:41,941 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:11:41,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-16 03:11:42,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:42,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-10-16 03:11:42,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:42,891 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-10-16 03:11:42,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 36 [2021-10-16 03:11:44,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:45,475 INFO L354 Elim1Store]: treesize reduction 108, result has 22.9 percent of original size [2021-10-16 03:11:45,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 55 [2021-10-16 03:11:46,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:46,045 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-16 03:11:46,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-10-16 03:11:46,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:46,158 INFO L354 Elim1Store]: treesize reduction 108, result has 18.2 percent of original size [2021-10-16 03:11:46,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 46 [2021-10-16 03:11:47,452 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-10-16 03:11:47,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 29 [2021-10-16 03:11:47,996 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 03:11:47,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:52,233 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:52,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-16 03:12:45,467 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem10.offset| (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_117 (_ BitVec 32))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem10.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem10.base|) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10.offset|) c_ULTIMATE.start_main_~x~0.base)))) (let ((.cse1 (select (select .cse0 c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))) (store .cse0 .cse1 (store (store (store (select .cse0 .cse1) v_ULTIMATE.start_main_~x~0.offset_117 (_ bv0 32)) (bvadd (_ bv12 32) v_ULTIMATE.start_main_~x~0.offset_117) v_DerPreprocessor_19) (bvadd (_ bv8 32) v_ULTIMATE.start_main_~x~0.offset_117) .cse1)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv8 32))))))))))))))))))) is different from false [2021-10-16 03:13:30,397 INFO L354 Elim1Store]: treesize reduction 5, result has 97.1 percent of original size [2021-10-16 03:13:30,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 196 [2021-10-16 03:14:58,019 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem10.offset| (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_117 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc9.base_32| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc9.base_32|))) (= (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~head~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset |v_ULTIMATE.start_main_#t~malloc9.base_32|)))) (store .cse2 |v_ULTIMATE.start_main_#t~malloc9.base_32| (store (select .cse2 |v_ULTIMATE.start_main_#t~malloc9.base_32|) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10.offset|) c_ULTIMATE.start_main_~head~0.base))))) (let ((.cse1 (select (select .cse0 c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset))) (store .cse0 .cse1 (store (store (store (select .cse0 .cse1) v_ULTIMATE.start_main_~x~0.offset_117 (_ bv0 32)) (bvadd (_ bv12 32) v_ULTIMATE.start_main_~x~0.offset_117) v_DerPreprocessor_19) (bvadd (_ bv8 32) v_ULTIMATE.start_main_~x~0.offset_117) .cse1)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv8 32))) c_ULTIMATE.start_main_~head~0.base))) is different from false [2021-10-16 03:14:59,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 03:14:59,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:14:59,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 03:14:59,989 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 03:14:59,989 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 03:14:59,996 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr52REQUIRES_VIOLATION [2021-10-16 03:14:59,997 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-16 03:14:59,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-16 03:14:59,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-16 03:14:59,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-16 03:14:59,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-16 03:14:59,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-16 03:14:59,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-16 03:14:59,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-16 03:14:59,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-16 03:14:59,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-16 03:15:00,000 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-16 03:15:00,000 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-16 03:15:00,000 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-16 03:15:00,000 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-16 03:15:00,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-16 03:15:00,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-16 03:15:00,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-16 03:15:00,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-16 03:15:00,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-16 03:15:00,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-16 03:15:00,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-16 03:15:00,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-16 03:15:00,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-16 03:15:00,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-16 03:15:00,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-16 03:15:00,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-16 03:15:00,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-16 03:15:00,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-16 03:15:00,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-10-16 03:15:00,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION [2021-10-16 03:15:00,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION [2021-10-16 03:15:00,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-10-16 03:15:00,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION [2021-10-16 03:15:00,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION [2021-10-16 03:15:00,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION [2021-10-16 03:15:00,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION [2021-10-16 03:15:00,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATION [2021-10-16 03:15:00,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATION [2021-10-16 03:15:00,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION [2021-10-16 03:15:00,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION [2021-10-16 03:15:00,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40REQUIRES_VIOLATION [2021-10-16 03:15:00,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATION [2021-10-16 03:15:00,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATION [2021-10-16 03:15:00,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43REQUIRES_VIOLATION [2021-10-16 03:15:00,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44REQUIRES_VIOLATION [2021-10-16 03:15:00,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45REQUIRES_VIOLATION [2021-10-16 03:15:00,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46REQUIRES_VIOLATION [2021-10-16 03:15:00,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47REQUIRES_VIOLATION [2021-10-16 03:15:00,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr48REQUIRES_VIOLATION [2021-10-16 03:15:00,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr49REQUIRES_VIOLATION [2021-10-16 03:15:00,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr50REQUIRES_VIOLATION [2021-10-16 03:15:00,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr51REQUIRES_VIOLATION [2021-10-16 03:15:00,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr53REQUIRES_VIOLATION [2021-10-16 03:15:00,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr54REQUIRES_VIOLATION [2021-10-16 03:15:00,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr55REQUIRES_VIOLATION [2021-10-16 03:15:00,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 03:15:00,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr57REQUIRES_VIOLATION [2021-10-16 03:15:00,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr58REQUIRES_VIOLATION [2021-10-16 03:15:00,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr59REQUIRES_VIOLATION [2021-10-16 03:15:00,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr60REQUIRES_VIOLATION [2021-10-16 03:15:00,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr61REQUIRES_VIOLATION [2021-10-16 03:15:00,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr62REQUIRES_VIOLATION [2021-10-16 03:15:00,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr63REQUIRES_VIOLATION [2021-10-16 03:15:00,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr64REQUIRES_VIOLATION [2021-10-16 03:15:00,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:15:00,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:15:00,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:15:00,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr68ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:15:00,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:15:00,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr70ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:15:00,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr71ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 03:15:00,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:00,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:00,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:00,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:15:00,618 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:15:00,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:15:00 BoogieIcfgContainer [2021-10-16 03:15:00,633 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:15:00,634 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:15:00,634 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:15:00,634 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:15:00,635 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:31" (3/4) ... [2021-10-16 03:15:00,639 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 03:15:00,640 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:15:00,641 INFO L168 Benchmark]: Toolchain (without parser) took 631271.45 ms. Allocated memory was 60.8 MB in the beginning and 257.9 MB in the end (delta: 197.1 MB). Free memory was 39.2 MB in the beginning and 127.8 MB in the end (delta: -88.6 MB). Peak memory consumption was 108.0 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:00,641 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 60.8 MB. Free memory is still 41.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:15:00,641 INFO L168 Benchmark]: CACSL2BoogieTranslator took 731.39 ms. Allocated memory is still 60.8 MB. Free memory was 39.0 MB in the beginning and 35.2 MB in the end (delta: 3.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:00,643 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.14 ms. Allocated memory is still 60.8 MB. Free memory was 35.2 MB in the beginning and 33.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:00,643 INFO L168 Benchmark]: Boogie Preprocessor took 63.28 ms. Allocated memory is still 60.8 MB. Free memory was 33.0 MB in the beginning and 31.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:00,650 INFO L168 Benchmark]: RCFGBuilder took 1169.29 ms. Allocated memory was 60.8 MB in the beginning and 90.2 MB in the end (delta: 29.4 MB). Free memory was 31.0 MB in the beginning and 52.4 MB in the end (delta: -21.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:00,652 INFO L168 Benchmark]: TraceAbstraction took 629216.85 ms. Allocated memory was 90.2 MB in the beginning and 257.9 MB in the end (delta: 167.8 MB). Free memory was 51.7 MB in the beginning and 127.8 MB in the end (delta: -76.1 MB). Peak memory consumption was 152.8 MB. Max. memory is 16.1 GB. [2021-10-16 03:15:00,652 INFO L168 Benchmark]: Witness Printer took 5.82 ms. Allocated memory is still 257.9 MB. Free memory is still 127.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:15:00,657 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 60.8 MB. Free memory is still 41.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 731.39 ms. Allocated memory is still 60.8 MB. Free memory was 39.0 MB in the beginning and 35.2 MB in the end (delta: 3.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.14 ms. Allocated memory is still 60.8 MB. Free memory was 35.2 MB in the beginning and 33.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.28 ms. Allocated memory is still 60.8 MB. Free memory was 33.0 MB in the beginning and 31.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1169.29 ms. Allocated memory was 60.8 MB in the beginning and 90.2 MB in the end (delta: 29.4 MB). Free memory was 31.0 MB in the beginning and 52.4 MB in the end (delta: -21.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 629216.85 ms. Allocated memory was 90.2 MB in the beginning and 257.9 MB in the end (delta: 167.8 MB). Free memory was 51.7 MB in the beginning and 127.8 MB in the end (delta: -76.1 MB). Peak memory consumption was 152.8 MB. Max. memory is 16.1 GB. * Witness Printer took 5.82 ms. Allocated memory is still 257.9 MB. Free memory is still 127.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = ((void*)0) [L999] head->prev = ((void*)0) [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1000] head->data = 0 [L1000] head->opt = head [L1001] SLL* x = head; [L1003] COND TRUE __VERIFIER_nondet_int() [L1003] x->next = malloc(sizeof(SLL)) [L1003] EXPR x->next [L1003] x->next->prev = x [L1003] EXPR x->next [L1003] x = x->next [L1003] x->next = ((void*)0) [L1003] COND FALSE !(__VERIFIER_nondet_int()) [L1003] COND TRUE __VERIFIER_nondet_int() [L1003] x->data = 1 [L1003] x->opt = x [L1003] COND FALSE !(__VERIFIER_nondet_int()) [L1006] x = head [L1007] COND TRUE x != ((void*)0) [L1009] EXPR x->data [L1009] EXPR x->data == 2 && x->opt != x [L1009] EXPR x->opt [L1009] EXPR x->data == 2 && x->opt != x [L1009] x->data == 2 && x->opt != x && x->opt->next == ((void*)0) [L1009] EXPR x->opt [L1009] x->opt->next - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1020]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1020]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1020]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1020]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1020]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 994]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 150 locations, 72 error locations. Started 1 CEGAR loops. OverallTime: 629134.2ms, OverallIterations: 26, TraceHistogramMax: 2, EmptinessCheckTime: 39.2ms, AutomataDifference: 111638.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2176 SDtfs, 4600 SDslu, 7571 SDs, 0 SdLazy, 8860 SolverSat, 561 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 41455.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1283 GetRequests, 911 SyntacticMatches, 23 SemanticMatches, 349 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 123889.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=202occurred in iteration=16, InterpolantAutomatonStates: 275, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 254.8ms AutomataMinimizationTime, 25 MinimizatonAttempts, 957 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 295.3ms SsaConstructionTime, 1685.0ms SatisfiabilityAnalysisTime, 75446.7ms InterpolantComputationTime, 585 NumberOfCodeBlocks, 585 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1114 ConstructedInterpolants, 62 QuantifiedInterpolants, 15312 SizeOfPredicates, 188 NumberOfNonLiveVariables, 2467 ConjunctsInSsa, 240 ConjunctsInUnsatCore, 56 InterpolantComputations, 48 PerfectInterpolantSequences, 10/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-16 03:15:00,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a371e49f-c23a-448d-b9ee-1930cccd3d2e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...