./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const_m2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const_m2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06c952a07d861e134050c8036ebe12899287d1c68b93fe51209b5cc562011a68 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:43:05,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:43:05,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:43:05,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:43:05,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:43:05,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:43:05,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:43:05,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:43:05,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:43:05,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:43:05,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:43:05,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:43:05,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:43:05,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:43:05,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:43:05,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:43:05,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:43:05,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:43:05,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:43:05,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:43:05,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:43:05,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:43:05,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:43:05,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:43:05,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:43:05,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:43:05,667 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:43:05,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:43:05,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:43:05,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:43:05,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:43:05,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:43:05,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:43:05,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:43:05,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:43:05,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:43:05,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:43:05,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:43:05,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:43:05,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:43:05,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:43:05,684 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:43:05,733 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:43:05,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:43:05,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:43:05,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:43:05,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:43:05,735 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:43:05,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:43:05,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:43:05,740 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:43:05,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:43:05,742 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:43:05,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:43:05,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:43:05,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:43:05,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:43:05,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:43:05,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:43:05,743 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:43:05,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:43:05,744 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:43:05,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:43:05,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:43:05,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:43:05,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:43:05,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:43:05,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:43:05,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:43:05,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:43:05,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:43:05,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:43:05,746 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:43:05,747 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:43:05,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:43:05,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06c952a07d861e134050c8036ebe12899287d1c68b93fe51209b5cc562011a68 [2022-11-02 20:43:06,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:43:06,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:43:06,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:43:06,138 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:43:06,139 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:43:06,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-crafted/zero_sum_const_m2.c [2022-11-02 20:43:06,229 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/data/cd9384591/c5f95cde422e4a06bc30b1decd8fa189/FLAGf987b6646 [2022-11-02 20:43:06,791 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:43:06,792 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/sv-benchmarks/c/array-crafted/zero_sum_const_m2.c [2022-11-02 20:43:06,800 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/data/cd9384591/c5f95cde422e4a06bc30b1decd8fa189/FLAGf987b6646 [2022-11-02 20:43:07,139 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/data/cd9384591/c5f95cde422e4a06bc30b1decd8fa189 [2022-11-02 20:43:07,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:43:07,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:43:07,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:43:07,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:43:07,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:43:07,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:43:07" (1/1) ... [2022-11-02 20:43:07,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@564a74c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07, skipping insertion in model container [2022-11-02 20:43:07,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:43:07" (1/1) ... [2022-11-02 20:43:07,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:43:07,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:43:07,411 WARN L230 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_04717528-21bf-45b2-af2d-e5c2c8f22d07/sv-benchmarks/c/array-crafted/zero_sum_const_m2.c[408,421] [2022-11-02 20:43:07,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:43:07,459 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:43:07,477 WARN L230 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_04717528-21bf-45b2-af2d-e5c2c8f22d07/sv-benchmarks/c/array-crafted/zero_sum_const_m2.c[408,421] [2022-11-02 20:43:07,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:43:07,529 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:43:07,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07 WrapperNode [2022-11-02 20:43:07,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:43:07,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:43:07,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:43:07,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:43:07,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07" (1/1) ... [2022-11-02 20:43:07,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07" (1/1) ... [2022-11-02 20:43:07,579 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2022-11-02 20:43:07,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:43:07,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:43:07,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:43:07,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:43:07,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07" (1/1) ... [2022-11-02 20:43:07,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07" (1/1) ... [2022-11-02 20:43:07,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07" (1/1) ... [2022-11-02 20:43:07,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07" (1/1) ... [2022-11-02 20:43:07,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07" (1/1) ... [2022-11-02 20:43:07,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07" (1/1) ... [2022-11-02 20:43:07,629 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07" (1/1) ... [2022-11-02 20:43:07,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07" (1/1) ... [2022-11-02 20:43:07,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:43:07,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:43:07,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:43:07,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:43:07,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07" (1/1) ... [2022-11-02 20:43:07,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:43:07,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:07,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:43:07,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:43:07,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:43:07,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:43:07,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:43:07,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:43:07,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:43:07,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:43:07,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:43:07,830 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:43:07,833 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:43:08,124 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:43:08,131 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:43:08,132 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-02 20:43:08,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:43:08 BoogieIcfgContainer [2022-11-02 20:43:08,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:43:08,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:43:08,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:43:08,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:43:08,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:43:07" (1/3) ... [2022-11-02 20:43:08,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5850cb2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:43:08, skipping insertion in model container [2022-11-02 20:43:08,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:07" (2/3) ... [2022-11-02 20:43:08,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5850cb2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:43:08, skipping insertion in model container [2022-11-02 20:43:08,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:43:08" (3/3) ... [2022-11-02 20:43:08,146 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2022-11-02 20:43:08,203 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:43:08,203 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:43:08,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:08,332 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6b7bb11c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:08,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:43:08,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 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) [2022-11-02 20:43:08,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:43:08,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:08,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:08,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:43:08,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:08,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2022-11-02 20:43:08,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:08,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026577901] [2022-11-02 20:43:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:08,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:08,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026577901] [2022-11-02 20:43:08,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026577901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:08,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:08,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:43:08,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374427091] [2022-11-02 20:43:08,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:08,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:43:08,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:08,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:43:08,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:43:08,709 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 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) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2022-11-02 20:43:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:08,733 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2022-11-02 20:43:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:43:08,736 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 [2022-11-02 20:43:08,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:08,748 INFO L225 Difference]: With dead ends: 47 [2022-11-02 20:43:08,749 INFO L226 Difference]: Without dead ends: 21 [2022-11-02 20:43:08,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:43:08,766 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:08,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:43:08,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-02 20:43:08,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-02 20:43:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2022-11-02 20:43:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-02 20:43:08,842 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2022-11-02 20:43:08,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:08,843 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-02 20:43:08,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2022-11-02 20:43:08,845 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-02 20:43:08,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:43:08,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:08,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:08,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:43:08,848 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:43:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:08,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2022-11-02 20:43:08,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:08,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835102232] [2022-11-02 20:43:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:08,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:09,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:09,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835102232] [2022-11-02 20:43:09,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835102232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:09,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:09,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:09,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091483919] [2022-11-02 20:43:09,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:09,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:09,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:09,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:09,056 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-02 20:43:09,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:09,104 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-11-02 20:43:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:09,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 [2022-11-02 20:43:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:09,105 INFO L225 Difference]: With dead ends: 39 [2022-11-02 20:43:09,106 INFO L226 Difference]: Without dead ends: 23 [2022-11-02 20:43:09,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:09,108 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:09,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:43:09,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-02 20:43:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-11-02 20:43:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-02 20:43:09,114 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2022-11-02 20:43:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:09,114 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-02 20:43:09,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-02 20:43:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-02 20:43:09,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:43:09,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:09,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:09,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:43:09,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:43:09,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2022-11-02 20:43:09,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:09,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973898503] [2022-11-02 20:43:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:09,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:43:09,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:09,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973898503] [2022-11-02 20:43:09,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973898503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:09,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:09,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:43:09,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314530946] [2022-11-02 20:43:09,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:09,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:43:09,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:09,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:43:09,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:43:09,216 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:09,322 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-11-02 20:43:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:43:09,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-11-02 20:43:09,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:09,325 INFO L225 Difference]: With dead ends: 44 [2022-11-02 20:43:09,325 INFO L226 Difference]: Without dead ends: 31 [2022-11-02 20:43:09,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:43:09,334 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:09,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 13 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:43:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-02 20:43:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-11-02 20:43:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2022-11-02 20:43:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-02 20:43:09,345 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-11-02 20:43:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:09,346 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-02 20:43:09,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-02 20:43:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:43:09,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:09,348 INFO L195 NwaCegarLoop]: 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] [2022-11-02 20:43:09,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:43:09,348 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:43:09,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:09,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2022-11-02 20:43:09,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:09,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306600943] [2022-11-02 20:43:09,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:09,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:43:09,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:09,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306600943] [2022-11-02 20:43:09,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306600943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:09,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256929535] [2022-11-02 20:43:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:09,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:09,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:09,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:09,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:43:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:09,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:09,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:43:09,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:43:09,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256929535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:09,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:09,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-02 20:43:09,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298564028] [2022-11-02 20:43:09,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:09,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:43:09,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:09,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:43:09,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:43:09,743 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:09,826 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-11-02 20:43:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:43:09,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2022-11-02 20:43:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:09,828 INFO L225 Difference]: With dead ends: 49 [2022-11-02 20:43:09,828 INFO L226 Difference]: Without dead ends: 29 [2022-11-02 20:43:09,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:43:09,830 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:09,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:43:09,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-02 20:43:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-11-02 20:43:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-02 20:43:09,838 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2022-11-02 20:43:09,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:09,838 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-02 20:43:09,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:09,839 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-02 20:43:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:43:09,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:09,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:09,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:10,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:10,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:43:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:10,056 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2022-11-02 20:43:10,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:10,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269197750] [2022-11-02 20:43:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:10,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:43:10,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:10,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269197750] [2022-11-02 20:43:10,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269197750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:10,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788578643] [2022-11-02 20:43:10,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:43:10,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:10,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:10,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:10,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:43:10,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:43:10,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:43:10,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:10,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:43:10,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:43:10,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788578643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:10,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:10,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-02 20:43:10,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84889260] [2022-11-02 20:43:10,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:10,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:43:10,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:10,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:43:10,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:43:10,557 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:10,739 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-11-02 20:43:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:43:10,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2022-11-02 20:43:10,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:10,741 INFO L225 Difference]: With dead ends: 57 [2022-11-02 20:43:10,742 INFO L226 Difference]: Without dead ends: 41 [2022-11-02 20:43:10,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:43:10,743 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:10,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:43:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-02 20:43:10,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-11-02 20:43:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-11-02 20:43:10,756 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2022-11-02 20:43:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:10,757 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-11-02 20:43:10,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:10,758 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-11-02 20:43:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 20:43:10,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:10,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:10,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:10,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:10,980 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:43:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2022-11-02 20:43:10,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:10,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626844393] [2022-11-02 20:43:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:10,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:13,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:13,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626844393] [2022-11-02 20:43:13,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626844393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:13,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98043238] [2022-11-02 20:43:13,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:43:13,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:13,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:13,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:14,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:43:14,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:43:14,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:43:14,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-02 20:43:14,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:14,187 INFO L390 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 15 treesize of output 11 [2022-11-02 20:43:14,358 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-02 20:43:14,361 INFO L390 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 23 treesize of output 22 [2022-11-02 20:43:17,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:17,492 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:43:17,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2022-11-02 20:43:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:17,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:18,810 INFO L390 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 49 treesize of output 45 [2022-11-02 20:44:18,849 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:44:18,849 INFO L390 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 380 treesize of output 344 [2022-11-02 20:44:20,379 INFO L390 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 50 treesize of output 46 [2022-11-02 20:44:20,397 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-02 20:44:20,398 INFO L390 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 399 treesize of output 355 [2022-11-02 20:44:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:23,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98043238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:23,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:44:23,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 30] total 73 [2022-11-02 20:44:23,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118966961] [2022-11-02 20:44:23,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:23,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-02 20:44:23,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:23,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-02 20:44:23,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=4779, Unknown=22, NotChecked=0, Total=5256 [2022-11-02 20:44:23,183 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 73 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:44:58,935 WARN L234 SmtUtils]: Spent 20.85s on a formula simplification. DAG size of input: 62 DAG size of output: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:45:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:01,382 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2022-11-02 20:45:01,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-02 20:45:01,383 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 0 states have call successors, (0), 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 35 [2022-11-02 20:45:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:01,385 INFO L225 Difference]: With dead ends: 96 [2022-11-02 20:45:01,385 INFO L226 Difference]: Without dead ends: 90 [2022-11-02 20:45:01,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 15 SyntacticMatches, 13 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2567 ImplicationChecksByTransitivity, 102.7s TimeCoverageRelationStatistics Valid=669, Invalid=7134, Unknown=29, NotChecked=0, Total=7832 [2022-11-02 20:45:01,389 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:01,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 104 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 180 Invalid, 0 Unknown, 291 Unchecked, 0.2s Time] [2022-11-02 20:45:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-02 20:45:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2022-11-02 20:45:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:45:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-11-02 20:45:01,420 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 35 [2022-11-02 20:45:01,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:01,421 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-11-02 20:45:01,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:45:01,422 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-11-02 20:45:01,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:45:01,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:01,426 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:01,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:01,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:45:01,632 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:45:01,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:01,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2022-11-02 20:45:01,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:01,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004751669] [2022-11-02 20:45:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:01,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:45:01,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:01,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004751669] [2022-11-02 20:45:01,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004751669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:01,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745748170] [2022-11-02 20:45:01,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:45:01,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:01,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:01,758 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:01,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:45:01,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:45:01,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:01,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:45:01,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:45:01,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:45:02,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745748170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:02,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:02,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-02 20:45:02,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427709341] [2022-11-02 20:45:02,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:02,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:45:02,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:02,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:45:02,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:45:02,057 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2022-11-02 20:45:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:02,308 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2022-11-02 20:45:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:45:02,309 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 37 [2022-11-02 20:45:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:02,310 INFO L225 Difference]: With dead ends: 137 [2022-11-02 20:45:02,312 INFO L226 Difference]: Without dead ends: 88 [2022-11-02 20:45:02,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:45:02,314 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:02,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:45:02,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-02 20:45:02,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2022-11-02 20:45:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:45:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-11-02 20:45:02,329 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 37 [2022-11-02 20:45:02,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:02,330 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-11-02 20:45:02,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2022-11-02 20:45:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-11-02 20:45:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:45:02,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:02,331 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:02,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:02,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:02,545 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:45:02,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:02,546 INFO L85 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2022-11-02 20:45:02,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:02,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540983139] [2022-11-02 20:45:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:02,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:45:02,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540983139] [2022-11-02 20:45:02,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540983139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586348673] [2022-11-02 20:45:02,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:45:02,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:02,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:02,717 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:02,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:45:02,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 20:45:02,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:02,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:45:02,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:45:02,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:45:03,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586348673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:03,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:03,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-02 20:45:03,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680507269] [2022-11-02 20:45:03,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:03,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:45:03,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:03,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:45:03,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:45:03,071 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:45:03,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:03,311 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-11-02 20:45:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:45:03,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-02 20:45:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:03,313 INFO L225 Difference]: With dead ends: 82 [2022-11-02 20:45:03,313 INFO L226 Difference]: Without dead ends: 60 [2022-11-02 20:45:03,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:45:03,314 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 102 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:03,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:45:03,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-02 20:45:03,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2022-11-02 20:45:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 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) [2022-11-02 20:45:03,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-11-02 20:45:03,323 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2022-11-02 20:45:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:03,324 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-11-02 20:45:03,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:45:03,324 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-11-02 20:45:03,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:45:03,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:03,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:03,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:03,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:45:03,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:45:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:03,541 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2022-11-02 20:45:03,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:03,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944920871] [2022-11-02 20:45:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:03,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:08,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:08,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944920871] [2022-11-02 20:45:08,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944920871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:08,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108915557] [2022-11-02 20:45:08,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:45:08,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:08,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:08,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:08,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04717528-21bf-45b2-af2d-e5c2c8f22d07/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:45:08,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 20:45:08,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:08,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-02 20:45:08,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:08,945 INFO L390 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 15 treesize of output 11 [2022-11-02 20:45:09,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:09,111 INFO L390 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 [2022-11-02 20:45:09,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:09,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:09,304 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:45:09,304 INFO L390 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 [2022-11-02 20:45:14,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:14,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:45:14,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:14,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:45:14,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:14,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:45:14,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:45:14,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:14,580 INFO L356 Elim1Store]: treesize reduction 6, result has 68.4 percent of original size [2022-11-02 20:45:14,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 30 [2022-11-02 20:45:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:14,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:32,873 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_132| Int) (|v_ULTIMATE.start_main_~i~0#1_131| Int) (|v_ULTIMATE.start_main_~i~0#1_140| Int)) (or (not (<= |v_ULTIMATE.start_main_~i~0#1_132| 1)) (< |v_ULTIMATE.start_main_~i~0#1_131| |c_ULTIMATE.start_main_~i~0#1|) (< (+ |v_ULTIMATE.start_main_~i~0#1_140| 1) |c_ULTIMATE.start_main_~i~0#1|) (not (<= |v_ULTIMATE.start_main_~i~0#1_131| (+ |v_ULTIMATE.start_main_~i~0#1_132| 1))) (not (<= |v_ULTIMATE.start_main_~i~0#1_140| 1)) (< (+ (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_131| 4))) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_132| 4)))) (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_140| 4))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 1))))) (forall ((|v_ULTIMATE.start_main_~i~0#1_132| Int) (|v_ULTIMATE.start_main_~i~0#1_131| Int) (|v_ULTIMATE.start_main_~i~0#1_140| Int)) (or (not (<= |v_ULTIMATE.start_main_~i~0#1_132| 1)) (< |v_ULTIMATE.start_main_~i~0#1_131| |c_ULTIMATE.start_main_~i~0#1|) (< (+ |v_ULTIMATE.start_main_~i~0#1_140| 1) |c_ULTIMATE.start_main_~i~0#1|) (<= (let ((.cse2 (* |v_ULTIMATE.start_main_~i~0#1_140| 4))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse0 (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse0 (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_131| 4))) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_132| 4))))) (not (<= |v_ULTIMATE.start_main_~i~0#1_131| (+ |v_ULTIMATE.start_main_~i~0#1_132| 1))) (not (<= |v_ULTIMATE.start_main_~i~0#1_140| 1)))))) is different from false [2022-11-02 20:45:55,427 WARN L234 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:45:57,499 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse1 (let ((.cse4 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| 4) 1)))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_132| Int) (|v_ULTIMATE.start_main_~i~0#1_131| Int) (|v_ULTIMATE.start_main_~i~0#1_140| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_131| .cse0) (not (<= |v_ULTIMATE.start_main_~i~0#1_132| 1)) (< |v_ULTIMATE.start_main_~i~0#1_140| |c_ULTIMATE.start_main_~i~0#1|) (not (<= |v_ULTIMATE.start_main_~i~0#1_131| (+ |v_ULTIMATE.start_main_~i~0#1_132| 1))) (<= (let ((.cse2 (* |v_ULTIMATE.start_main_~i~0#1_140| 4))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse1 (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (+ (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_131| 4))) (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_132| 4))))) (not (<= |v_ULTIMATE.start_main_~i~0#1_140| 1)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_132| Int) (|v_ULTIMATE.start_main_~i~0#1_131| Int) (|v_ULTIMATE.start_main_~i~0#1_140| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_131| .cse0) (not (<= |v_ULTIMATE.start_main_~i~0#1_132| 1)) (< |v_ULTIMATE.start_main_~i~0#1_140| |c_ULTIMATE.start_main_~i~0#1|) (not (<= |v_ULTIMATE.start_main_~i~0#1_131| (+ |v_ULTIMATE.start_main_~i~0#1_132| 1))) (not (<= |v_ULTIMATE.start_main_~i~0#1_140| 1)) (< (+ (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_131| 4))) (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_132| 4)))) (let ((.cse3 (* |v_ULTIMATE.start_main_~i~0#1_140| 4))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse1 (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 1))))))) is different from false [2022-11-02 20:46:10,086 INFO L390 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 134 treesize of output 126 [2022-11-02 20:46:10,139 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:46:10,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 119033 treesize of output 106297