./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU --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 fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:39:27,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:39:27,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:39:27,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:39:27,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:39:27,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:39:27,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:39:27,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:39:27,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:39:27,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:39:27,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:39:27,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:39:27,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:39:27,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:39:27,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:39:27,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:39:27,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:39:27,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:39:27,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:39:27,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:39:27,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:39:27,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:39:27,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:39:27,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:39:27,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:39:27,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:39:27,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:39:27,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:39:27,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:39:27,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:39:27,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:39:27,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:39:27,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:39:27,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:39:27,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:39:27,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:39:27,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:39:27,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:39:27,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:39:27,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:39:27,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:39:27,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:39:27,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:39:27,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:39:27,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:39:27,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:39:27,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:39:27,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:39:27,663 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:39:27,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:39:27,664 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:39:27,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:39:27,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:39:27,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:39:27,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:39:27,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:39:27,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:39:27,667 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:39:27,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:39:27,667 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:39:27,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:39:27,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:39:27,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:39:27,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:39:27,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:39:27,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:39:27,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:39:27,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:39:27,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:39:27,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:39:27,670 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:39:27,671 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:39:27,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:39:27,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:39:27,672 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_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 [2021-11-02 22:39:28,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:39:28,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:39:28,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:39:28,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:39:28,079 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:39:28,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2021-11-02 22:39:28,172 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/data/805c9e05f/06401ba92fb847f59f341b21b0ce7b83/FLAG8fffd5312 [2021-11-02 22:39:28,772 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:39:28,773 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2021-11-02 22:39:28,785 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/data/805c9e05f/06401ba92fb847f59f341b21b0ce7b83/FLAG8fffd5312 [2021-11-02 22:39:29,127 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/data/805c9e05f/06401ba92fb847f59f341b21b0ce7b83 [2021-11-02 22:39:29,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:39:29,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:39:29,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:39:29,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:39:29,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:39:29,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:39:29" (1/1) ... [2021-11-02 22:39:29,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cf2eec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:29, skipping insertion in model container [2021-11-02 22:39:29,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:39:29" (1/1) ... [2021-11-02 22:39:29,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:39:29,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:39:29,391 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2021-11-02 22:39:29,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:39:29,433 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:39:29,451 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2021-11-02 22:39:29,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:39:29,496 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:39:29,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:29 WrapperNode [2021-11-02 22:39:29,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:39:29,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:39:29,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:39:29,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:39:29,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:29" (1/1) ... [2021-11-02 22:39:29,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:29" (1/1) ... [2021-11-02 22:39:29,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:39:29,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:39:29,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:39:29,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:39:29,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:29" (1/1) ... [2021-11-02 22:39:29,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:29" (1/1) ... [2021-11-02 22:39:29,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:29" (1/1) ... [2021-11-02 22:39:29,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:29" (1/1) ... [2021-11-02 22:39:29,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:29" (1/1) ... [2021-11-02 22:39:29,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:29" (1/1) ... [2021-11-02 22:39:29,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:29" (1/1) ... [2021-11-02 22:39:29,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:39:29,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:39:29,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:39:29,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:39:29,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:29" (1/1) ... [2021-11-02 22:39:29,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:39:29,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:29,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:39:29,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:39:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:39:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:39:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:39:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:39:29,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:39:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:39:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:39:29,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:39:29,903 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-02 22:39:29,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:39:29 BoogieIcfgContainer [2021-11-02 22:39:29,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:39:29,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:39:29,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:39:29,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:39:29,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:39:29" (1/3) ... [2021-11-02 22:39:29,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dac4d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:39:29, skipping insertion in model container [2021-11-02 22:39:29,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:29" (2/3) ... [2021-11-02 22:39:29,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dac4d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:39:29, skipping insertion in model container [2021-11-02 22:39:29,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:39:29" (3/3) ... [2021-11-02 22:39:29,932 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2021-11-02 22:39:29,938 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:39:29,953 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:39:30,041 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:39:30,065 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:39:30,065 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:39:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 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) [2021-11-02 22:39:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:39:30,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:30,111 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:30,112 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:30,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:30,126 INFO L85 PathProgramCache]: Analyzing trace with hash -700880873, now seen corresponding path program 1 times [2021-11-02 22:39:30,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:30,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382995775] [2021-11-02 22:39:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:30,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:39:30,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:30,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382995775] [2021-11-02 22:39:30,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382995775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:39:30,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:39:30,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:39:30,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815230348] [2021-11-02 22:39:30,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:39:30,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:30,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:39:30,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:39:30,471 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:30,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:30,523 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2021-11-02 22:39:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:39:30,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-02 22:39:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:30,535 INFO L225 Difference]: With dead ends: 42 [2021-11-02 22:39:30,535 INFO L226 Difference]: Without dead ends: 20 [2021-11-02 22:39:30,539 INFO L786 BasicCegarLoop]: 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 [2021-11-02 22:39:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-02 22:39:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-02 22:39:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-02 22:39:30,581 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-02 22:39:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:30,582 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-02 22:39:30,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-02 22:39:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:39:30,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:30,583 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:30,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:39:30,584 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:30,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1756124227, now seen corresponding path program 1 times [2021-11-02 22:39:30,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:30,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697203029] [2021-11-02 22:39:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:30,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:39:30,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:30,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697203029] [2021-11-02 22:39:30,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697203029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:39:30,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:39:30,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:39:30,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705562405] [2021-11-02 22:39:30,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:39:30,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:30,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:39:30,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:39:30,647 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:30,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:30,695 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-11-02 22:39:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:39:30,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-02 22:39:30,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:30,697 INFO L225 Difference]: With dead ends: 36 [2021-11-02 22:39:30,697 INFO L226 Difference]: Without dead ends: 25 [2021-11-02 22:39:30,698 INFO L786 BasicCegarLoop]: 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 [2021-11-02 22:39:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-02 22:39:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-11-02 22:39:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2021-11-02 22:39:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-11-02 22:39:30,703 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-11-02 22:39:30,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:30,704 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-11-02 22:39:30,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-11-02 22:39:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:39:30,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:30,706 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:30,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:39:30,707 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:30,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1655857333, now seen corresponding path program 1 times [2021-11-02 22:39:30,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:30,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118628917] [2021-11-02 22:39:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:30,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:39:30,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:30,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118628917] [2021-11-02 22:39:30,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118628917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:30,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160642436] [2021-11-02 22:39:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:30,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:30,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:30,806 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:30,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:39:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:30,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:39:30,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:39:30,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160642436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:30,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:30,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 22:39:30,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480898589] [2021-11-02 22:39:30,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:39:30,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:30,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:39:30,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:39:30,989 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:31,011 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-11-02 22:39:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:39:31,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 22:39:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:31,013 INFO L225 Difference]: With dead ends: 40 [2021-11-02 22:39:31,013 INFO L226 Difference]: Without dead ends: 24 [2021-11-02 22:39:31,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:39:31,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-02 22:39:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-02 22:39:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-02 22:39:31,020 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 18 [2021-11-02 22:39:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:31,020 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-02 22:39:31,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:31,021 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-02 22:39:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:39:31,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:31,030 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:31,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-02 22:39:31,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:31,231 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:31,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:31,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1273395149, now seen corresponding path program 2 times [2021-11-02 22:39:31,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:31,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424965889] [2021-11-02 22:39:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:31,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:39:31,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:31,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424965889] [2021-11-02 22:39:31,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424965889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:31,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178819798] [2021-11-02 22:39:31,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:39:31,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:31,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:31,345 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:31,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:39:31,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:39:31,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:31,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:39:31,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:39:31,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178819798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:31,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:31,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-02 22:39:31,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772943065] [2021-11-02 22:39:31,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:39:31,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:31,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:39:31,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:39:31,555 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:31,657 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2021-11-02 22:39:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:39:31,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 22:39:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:31,660 INFO L225 Difference]: With dead ends: 52 [2021-11-02 22:39:31,662 INFO L226 Difference]: Without dead ends: 36 [2021-11-02 22:39:31,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:39:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-02 22:39:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2021-11-02 22:39:31,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-02 22:39:31,677 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2021-11-02 22:39:31,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:31,678 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-02 22:39:31,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:31,679 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-02 22:39:31,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:39:31,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:31,681 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:31,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-02 22:39:31,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:31,906 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:31,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:31,907 INFO L85 PathProgramCache]: Analyzing trace with hash 461496583, now seen corresponding path program 3 times [2021-11-02 22:39:31,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:31,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058655207] [2021-11-02 22:39:31,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:31,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:39:32,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:32,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058655207] [2021-11-02 22:39:32,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058655207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:32,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416186814] [2021-11-02 22:39:32,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:39:32,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:32,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:32,050 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:32,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:39:32,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:39:32,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:32,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:39:32,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 22:39:32,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416186814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:32,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:32,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-02 22:39:32,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196015493] [2021-11-02 22:39:32,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:39:32,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:32,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:39:32,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:39:32,312 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:32,472 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2021-11-02 22:39:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:39:32,473 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 22:39:32,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:32,480 INFO L225 Difference]: With dead ends: 66 [2021-11-02 22:39:32,488 INFO L226 Difference]: Without dead ends: 44 [2021-11-02 22:39:32,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:39:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-02 22:39:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2021-11-02 22:39:32,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-11-02 22:39:32,506 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 28 [2021-11-02 22:39:32,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:32,508 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-11-02 22:39:32,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:32,509 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-11-02 22:39:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:39:32,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:32,511 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:32,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:32,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:32,714 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:32,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:32,714 INFO L85 PathProgramCache]: Analyzing trace with hash 997298065, now seen corresponding path program 4 times [2021-11-02 22:39:32,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:32,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358354263] [2021-11-02 22:39:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:32,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-02 22:39:32,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:32,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358354263] [2021-11-02 22:39:32,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358354263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:32,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538279011] [2021-11-02 22:39:32,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:39:32,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:32,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:32,878 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:32,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:39:32,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:39:32,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:32,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:39:32,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-02 22:39:33,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538279011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:33,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:33,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-02 22:39:33,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236286099] [2021-11-02 22:39:33,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:39:33,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:33,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:39:33,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:39:33,098 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:33,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:33,121 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2021-11-02 22:39:33,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:39:33,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-02 22:39:33,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:33,123 INFO L225 Difference]: With dead ends: 70 [2021-11-02 22:39:33,123 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 22:39:33,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:39:33,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 22:39:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-11-02 22:39:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-11-02 22:39:33,130 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 36 [2021-11-02 22:39:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:33,131 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-11-02 22:39:33,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-11-02 22:39:33,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:39:33,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:33,133 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:33,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:33,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 22:39:33,355 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:33,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1492513901, now seen corresponding path program 5 times [2021-11-02 22:39:33,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:33,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410728430] [2021-11-02 22:39:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:33,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-02 22:39:33,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:33,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410728430] [2021-11-02 22:39:33,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410728430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:33,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423289651] [2021-11-02 22:39:33,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:39:33,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:33,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:33,458 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:33,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:39:33,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 22:39:33,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:39:33,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 22:39:33,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423289651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:33,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:33,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-11-02 22:39:33,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958396282] [2021-11-02 22:39:33,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:39:33,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:33,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:39:33,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:39:33,818 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:33,979 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-11-02 22:39:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:39:33,982 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 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 38 [2021-11-02 22:39:33,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:33,982 INFO L225 Difference]: With dead ends: 82 [2021-11-02 22:39:33,983 INFO L226 Difference]: Without dead ends: 54 [2021-11-02 22:39:33,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:39:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-02 22:39:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2021-11-02 22:39:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2021-11-02 22:39:33,988 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 38 [2021-11-02 22:39:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:33,989 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2021-11-02 22:39:33,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2021-11-02 22:39:33,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:39:33,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:33,995 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:34,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:34,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:34,196 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:34,197 INFO L85 PathProgramCache]: Analyzing trace with hash -2093123123, now seen corresponding path program 6 times [2021-11-02 22:39:34,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:34,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433205735] [2021-11-02 22:39:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:34,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-02 22:39:34,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:34,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433205735] [2021-11-02 22:39:34,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433205735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:34,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162358150] [2021-11-02 22:39:34,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:39:34,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:34,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:34,323 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:34,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:39:34,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 22:39:34,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:34,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:39:34,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-02 22:39:34,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162358150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:34,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:34,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-02 22:39:34,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307942086] [2021-11-02 22:39:34,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:39:34,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:34,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:39:34,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:39:34,683 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:34,913 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2021-11-02 22:39:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:39:34,914 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 46 [2021-11-02 22:39:34,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:34,917 INFO L225 Difference]: With dead ends: 96 [2021-11-02 22:39:34,921 INFO L226 Difference]: Without dead ends: 62 [2021-11-02 22:39:34,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:39:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-02 22:39:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-11-02 22:39:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.25) internal successors, (70), 56 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:34,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2021-11-02 22:39:34,933 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 46 [2021-11-02 22:39:34,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:34,933 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2021-11-02 22:39:34,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2021-11-02 22:39:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:39:34,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:34,935 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:34,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:35,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:35,137 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:35,138 INFO L85 PathProgramCache]: Analyzing trace with hash 411996503, now seen corresponding path program 7 times [2021-11-02 22:39:35,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:35,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182127933] [2021-11-02 22:39:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:35,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 22:39:35,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:35,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182127933] [2021-11-02 22:39:35,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182127933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:35,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913454830] [2021-11-02 22:39:35,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:39:35,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:35,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:35,290 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:35,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:39:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:39:35,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 22:39:35,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913454830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:35,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:35,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 22:39:35,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752065876] [2021-11-02 22:39:35,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:39:35,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:39:35,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:39:35,657 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:35,694 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2021-11-02 22:39:35,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:39:35,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-02 22:39:35,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:35,696 INFO L225 Difference]: With dead ends: 100 [2021-11-02 22:39:35,696 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 22:39:35,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:39:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 22:39:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-11-02 22:39:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 22:39:35,704 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 54 [2021-11-02 22:39:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:35,705 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 22:39:35,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 22:39:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:39:35,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:35,707 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:35,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:35,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:35,924 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:35,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:35,925 INFO L85 PathProgramCache]: Analyzing trace with hash -254488359, now seen corresponding path program 8 times [2021-11-02 22:39:35,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:35,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698608012] [2021-11-02 22:39:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:35,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 22:39:36,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:36,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698608012] [2021-11-02 22:39:36,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698608012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:36,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817205417] [2021-11-02 22:39:36,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:39:36,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:36,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:36,055 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:36,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:39:36,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:39:36,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:36,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:39:36,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 22:39:36,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817205417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:36,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:36,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 22:39:36,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445716218] [2021-11-02 22:39:36,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:39:36,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:36,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:39:36,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:39:36,408 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:36,447 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2021-11-02 22:39:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:39:36,447 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 22:39:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:36,449 INFO L225 Difference]: With dead ends: 102 [2021-11-02 22:39:36,449 INFO L226 Difference]: Without dead ends: 62 [2021-11-02 22:39:36,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:39:36,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-02 22:39:36,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-02 22:39:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 60 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-11-02 22:39:36,471 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 56 [2021-11-02 22:39:36,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:36,474 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-11-02 22:39:36,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:36,474 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-11-02 22:39:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:39:36,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:36,481 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:36,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:36,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:39:36,682 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:36,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:36,683 INFO L85 PathProgramCache]: Analyzing trace with hash -796313637, now seen corresponding path program 9 times [2021-11-02 22:39:36,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:36,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667355861] [2021-11-02 22:39:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:36,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 22:39:36,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:36,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667355861] [2021-11-02 22:39:36,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667355861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:36,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471921782] [2021-11-02 22:39:36,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:39:36,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:36,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:36,846 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:36,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:39:37,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 22:39:37,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:37,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:39:37,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-02 22:39:37,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471921782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:37,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:37,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-11-02 22:39:37,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882329237] [2021-11-02 22:39:37,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:39:37,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:37,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:39:37,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:39:37,356 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:37,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:37,609 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2021-11-02 22:39:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:39:37,610 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 58 [2021-11-02 22:39:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:37,611 INFO L225 Difference]: With dead ends: 114 [2021-11-02 22:39:37,611 INFO L226 Difference]: Without dead ends: 74 [2021-11-02 22:39:37,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:39:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-02 22:39:37,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-11-02 22:39:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 68 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2021-11-02 22:39:37,619 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 58 [2021-11-02 22:39:37,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:37,619 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2021-11-02 22:39:37,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:37,619 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2021-11-02 22:39:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:39:37,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:37,621 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:37,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:37,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 22:39:37,838 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:37,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:37,839 INFO L85 PathProgramCache]: Analyzing trace with hash 576129301, now seen corresponding path program 10 times [2021-11-02 22:39:37,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:37,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173590358] [2021-11-02 22:39:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:37,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-02 22:39:37,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:37,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173590358] [2021-11-02 22:39:37,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173590358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:37,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446399387] [2021-11-02 22:39:37,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:39:37,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:37,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:37,995 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:38,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:39:38,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:39:38,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:38,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:39:38,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-02 22:39:38,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446399387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:38,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:38,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 22:39:38,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265526302] [2021-11-02 22:39:38,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:39:38,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:38,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:39:38,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:39:38,502 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:38,560 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2021-11-02 22:39:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:39:38,561 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 22:39:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:38,562 INFO L225 Difference]: With dead ends: 118 [2021-11-02 22:39:38,562 INFO L226 Difference]: Without dead ends: 72 [2021-11-02 22:39:38,563 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:39:38,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-02 22:39:38,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-02 22:39:38,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 70 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2021-11-02 22:39:38,571 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 66 [2021-11-02 22:39:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:38,571 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2021-11-02 22:39:38,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2021-11-02 22:39:38,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 22:39:38,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:38,573 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:38,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:38,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 22:39:38,782 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:38,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:38,782 INFO L85 PathProgramCache]: Analyzing trace with hash 515904919, now seen corresponding path program 11 times [2021-11-02 22:39:38,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:38,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460284165] [2021-11-02 22:39:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:38,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-02 22:39:38,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:38,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460284165] [2021-11-02 22:39:38,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460284165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:38,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965181186] [2021-11-02 22:39:38,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:39:38,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:38,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:38,976 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:38,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:39:40,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 22:39:40,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:40,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:39:40,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-02 22:39:40,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965181186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:40,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:40,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 22:39:40,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178399537] [2021-11-02 22:39:40,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:39:40,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:40,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:39:40,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:39:40,259 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-11-02 22:39:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:40,344 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2021-11-02 22:39:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:39:40,345 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 68 [2021-11-02 22:39:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:40,346 INFO L225 Difference]: With dead ends: 120 [2021-11-02 22:39:40,346 INFO L226 Difference]: Without dead ends: 74 [2021-11-02 22:39:40,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:39:40,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-02 22:39:40,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-02 22:39:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 72 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2021-11-02 22:39:40,352 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 68 [2021-11-02 22:39:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:40,352 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2021-11-02 22:39:40,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-11-02 22:39:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2021-11-02 22:39:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:39:40,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:40,354 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:40,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:40,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:39:40,574 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:40,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1525151335, now seen corresponding path program 12 times [2021-11-02 22:39:40,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:40,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083471630] [2021-11-02 22:39:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:40,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-02 22:39:40,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:40,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083471630] [2021-11-02 22:39:40,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083471630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:40,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140554907] [2021-11-02 22:39:40,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:39:40,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:40,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:40,782 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:40,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:39:41,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 22:39:41,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:41,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:39:41,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-02 22:39:41,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140554907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:41,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:41,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-11-02 22:39:41,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967630158] [2021-11-02 22:39:41,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:39:41,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:41,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:39:41,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:39:41,864 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:42,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:42,153 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2021-11-02 22:39:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:39:42,154 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 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 70 [2021-11-02 22:39:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:42,155 INFO L225 Difference]: With dead ends: 132 [2021-11-02 22:39:42,156 INFO L226 Difference]: Without dead ends: 86 [2021-11-02 22:39:42,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=426, Invalid=764, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:39:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-02 22:39:42,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2021-11-02 22:39:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.225) internal successors, (98), 80 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:42,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2021-11-02 22:39:42,175 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 70 [2021-11-02 22:39:42,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:42,175 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2021-11-02 22:39:42,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2021-11-02 22:39:42,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-02 22:39:42,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:42,182 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:42,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:42,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:42,399 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash -724753373, now seen corresponding path program 13 times [2021-11-02 22:39:42,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:42,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541593493] [2021-11-02 22:39:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:42,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-02 22:39:42,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:42,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541593493] [2021-11-02 22:39:42,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541593493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:42,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301346282] [2021-11-02 22:39:42,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:39:42,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:42,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:42,578 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:42,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:39:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:42,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:39:42,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-02 22:39:43,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301346282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:43,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:43,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 22:39:43,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734325368] [2021-11-02 22:39:43,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:39:43,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:43,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:39:43,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:39:43,056 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:43,111 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2021-11-02 22:39:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:39:43,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 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 78 [2021-11-02 22:39:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:43,113 INFO L225 Difference]: With dead ends: 136 [2021-11-02 22:39:43,114 INFO L226 Difference]: Without dead ends: 84 [2021-11-02 22:39:43,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:39:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-02 22:39:43,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-02 22:39:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 82 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-11-02 22:39:43,126 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 78 [2021-11-02 22:39:43,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:43,127 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-11-02 22:39:43,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-11-02 22:39:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 22:39:43,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:43,129 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:43,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:43,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:39:43,342 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:43,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:43,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1098023515, now seen corresponding path program 14 times [2021-11-02 22:39:43,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:43,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137368691] [2021-11-02 22:39:43,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:43,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-02 22:39:43,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:43,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137368691] [2021-11-02 22:39:43,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137368691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:43,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999976633] [2021-11-02 22:39:43,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:39:43,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:43,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:43,618 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:43,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:39:43,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:39:43,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:43,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:39:43,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-02 22:39:44,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999976633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:44,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:44,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 22:39:44,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581439482] [2021-11-02 22:39:44,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:39:44,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:39:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:39:44,220 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:44,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:44,287 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2021-11-02 22:39:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:39:44,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 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 80 [2021-11-02 22:39:44,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:44,292 INFO L225 Difference]: With dead ends: 138 [2021-11-02 22:39:44,292 INFO L226 Difference]: Without dead ends: 86 [2021-11-02 22:39:44,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:39:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-02 22:39:44,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-11-02 22:39:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 84 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2021-11-02 22:39:44,299 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 80 [2021-11-02 22:39:44,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:44,301 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2021-11-02 22:39:44,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2021-11-02 22:39:44,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 22:39:44,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:44,303 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:44,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:44,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:39:44,519 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:44,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:44,519 INFO L85 PathProgramCache]: Analyzing trace with hash 966622887, now seen corresponding path program 15 times [2021-11-02 22:39:44,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:44,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402794327] [2021-11-02 22:39:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:44,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-02 22:39:44,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:44,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402794327] [2021-11-02 22:39:44,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402794327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:44,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751649050] [2021-11-02 22:39:44,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:39:44,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:44,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:44,737 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:44,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:39:45,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 22:39:45,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:45,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:39:45,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-02 22:39:45,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751649050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:45,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:45,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2021-11-02 22:39:45,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050531228] [2021-11-02 22:39:45,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:39:45,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:45,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:39:45,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:39:45,649 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:46,054 INFO L93 Difference]: Finished difference Result 150 states and 190 transitions. [2021-11-02 22:39:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:39:46,055 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 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 82 [2021-11-02 22:39:46,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:46,056 INFO L225 Difference]: With dead ends: 150 [2021-11-02 22:39:46,056 INFO L226 Difference]: Without dead ends: 98 [2021-11-02 22:39:46,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1109, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:39:46,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-02 22:39:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-11-02 22:39:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 92 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2021-11-02 22:39:46,062 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 82 [2021-11-02 22:39:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:46,063 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2021-11-02 22:39:46,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2021-11-02 22:39:46,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 22:39:46,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:46,065 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:46,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:46,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:39:46,290 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:46,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:46,290 INFO L85 PathProgramCache]: Analyzing trace with hash -686887199, now seen corresponding path program 16 times [2021-11-02 22:39:46,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:46,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297653002] [2021-11-02 22:39:46,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:46,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-02 22:39:46,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:46,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297653002] [2021-11-02 22:39:46,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297653002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:46,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654060721] [2021-11-02 22:39:46,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:39:46,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:46,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:46,546 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:46,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:39:46,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:39:46,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:47,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 22:39:47,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-02 22:39:47,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654060721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:47,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:47,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 22:39:47,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954249199] [2021-11-02 22:39:47,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:39:47,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:47,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:39:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:39:47,250 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:47,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:47,316 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2021-11-02 22:39:47,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:39:47,317 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 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 90 [2021-11-02 22:39:47,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:47,318 INFO L225 Difference]: With dead ends: 154 [2021-11-02 22:39:47,319 INFO L226 Difference]: Without dead ends: 96 [2021-11-02 22:39:47,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:39:47,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-02 22:39:47,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-11-02 22:39:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 94 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:47,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2021-11-02 22:39:47,324 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 90 [2021-11-02 22:39:47,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:47,325 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2021-11-02 22:39:47,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:47,325 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2021-11-02 22:39:47,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 22:39:47,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:47,327 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:47,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:47,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:39:47,554 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:47,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:47,554 INFO L85 PathProgramCache]: Analyzing trace with hash -862251677, now seen corresponding path program 17 times [2021-11-02 22:39:47,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:47,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30022008] [2021-11-02 22:39:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:47,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-02 22:39:47,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:47,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30022008] [2021-11-02 22:39:47,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30022008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:47,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865402786] [2021-11-02 22:39:47,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:39:47,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:47,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:47,840 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:47,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:39:56,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-02 22:39:56,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:56,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:39:56,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-11-02 22:39:56,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865402786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:56,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:39:56,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2021-11-02 22:39:56,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380058288] [2021-11-02 22:39:56,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 22:39:56,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:56,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 22:39:56,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:39:56,780 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:57,184 INFO L93 Difference]: Finished difference Result 166 states and 210 transitions. [2021-11-02 22:39:57,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:39:57,184 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 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 92 [2021-11-02 22:39:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:57,185 INFO L225 Difference]: With dead ends: 166 [2021-11-02 22:39:57,185 INFO L226 Difference]: Without dead ends: 108 [2021-11-02 22:39:57,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=766, Invalid=1396, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:39:57,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-02 22:39:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2021-11-02 22:39:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 102 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2021-11-02 22:39:57,195 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 92 [2021-11-02 22:39:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:57,195 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2021-11-02 22:39:57,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2021-11-02 22:39:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 22:39:57,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:57,199 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:57,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:57,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:57,422 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:57,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:57,422 INFO L85 PathProgramCache]: Analyzing trace with hash 396252397, now seen corresponding path program 18 times [2021-11-02 22:39:57,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:57,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296189349] [2021-11-02 22:39:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:57,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-02 22:39:57,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:57,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296189349] [2021-11-02 22:39:57,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296189349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:57,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368153428] [2021-11-02 22:39:57,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:39:57,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:57,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:57,693 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:57,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:40:00,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 22:40:00,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:00,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:40:00,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-02 22:40:00,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368153428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:00,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:00,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2021-11-02 22:40:00,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710833367] [2021-11-02 22:40:00,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 22:40:00,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 22:40:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:40:00,742 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:01,221 INFO L93 Difference]: Finished difference Result 180 states and 228 transitions. [2021-11-02 22:40:01,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:40:01,222 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 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 100 [2021-11-02 22:40:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:01,224 INFO L225 Difference]: With dead ends: 180 [2021-11-02 22:40:01,224 INFO L226 Difference]: Without dead ends: 116 [2021-11-02 22:40:01,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=864, Invalid=1586, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 22:40:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-02 22:40:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2021-11-02 22:40:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2181818181818183) internal successors, (134), 110 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:01,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2021-11-02 22:40:01,231 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 100 [2021-11-02 22:40:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:01,231 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2021-11-02 22:40:01,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:01,232 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2021-11-02 22:40:01,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-02 22:40:01,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:01,233 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:01,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:01,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:01,451 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:01,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1863628249, now seen corresponding path program 19 times [2021-11-02 22:40:01,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:01,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697058863] [2021-11-02 22:40:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:01,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-11-02 22:40:01,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:01,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697058863] [2021-11-02 22:40:01,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697058863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:01,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060799668] [2021-11-02 22:40:01,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:40:01,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:01,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:01,746 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:01,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:40:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:02,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:40:02,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-11-02 22:40:02,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060799668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:02,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:02,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 22:40:02,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854542003] [2021-11-02 22:40:02,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:40:02,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:02,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:40:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:40:02,513 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:02,567 INFO L93 Difference]: Finished difference Result 184 states and 230 transitions. [2021-11-02 22:40:02,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:40:02,567 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 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 108 [2021-11-02 22:40:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:02,568 INFO L225 Difference]: With dead ends: 184 [2021-11-02 22:40:02,568 INFO L226 Difference]: Without dead ends: 114 [2021-11-02 22:40:02,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:40:02,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-02 22:40:02,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-11-02 22:40:02,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 112 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2021-11-02 22:40:02,574 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 108 [2021-11-02 22:40:02,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:02,575 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2021-11-02 22:40:02,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:02,575 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2021-11-02 22:40:02,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-02 22:40:02,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:02,577 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:02,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:02,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 22:40:02,798 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:02,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1988072489, now seen corresponding path program 20 times [2021-11-02 22:40:02,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:02,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835122317] [2021-11-02 22:40:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:02,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-11-02 22:40:03,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:03,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835122317] [2021-11-02 22:40:03,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835122317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:03,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452423312] [2021-11-02 22:40:03,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:40:03,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:03,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:03,158 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:03,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:40:03,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:40:03,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:03,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:40:03,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-11-02 22:40:04,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452423312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:04,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:04,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 22:40:04,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029921528] [2021-11-02 22:40:04,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:40:04,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:04,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:40:04,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:40:04,110 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:04,190 INFO L93 Difference]: Finished difference Result 186 states and 232 transitions. [2021-11-02 22:40:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:40:04,191 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 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 110 [2021-11-02 22:40:04,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:04,192 INFO L225 Difference]: With dead ends: 186 [2021-11-02 22:40:04,192 INFO L226 Difference]: Without dead ends: 116 [2021-11-02 22:40:04,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:40:04,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-02 22:40:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-11-02 22:40:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 114 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2021-11-02 22:40:04,199 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 110 [2021-11-02 22:40:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:04,199 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2021-11-02 22:40:04,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2021-11-02 22:40:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-02 22:40:04,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:04,202 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:04,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:04,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:04,426 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:04,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1210672555, now seen corresponding path program 21 times [2021-11-02 22:40:04,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:04,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822138708] [2021-11-02 22:40:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:04,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-11-02 22:40:04,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:04,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822138708] [2021-11-02 22:40:04,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822138708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:04,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947503304] [2021-11-02 22:40:04,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:40:04,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:04,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:04,743 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:04,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:40:06,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-02 22:40:06,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:06,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:40:06,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2021-11-02 22:40:06,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947503304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:06,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:06,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2021-11-02 22:40:06,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265061286] [2021-11-02 22:40:06,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 22:40:06,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 22:40:06,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:40:06,782 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:07,303 INFO L93 Difference]: Finished difference Result 198 states and 250 transitions. [2021-11-02 22:40:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 22:40:07,304 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 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 112 [2021-11-02 22:40:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:07,305 INFO L225 Difference]: With dead ends: 198 [2021-11-02 22:40:07,305 INFO L226 Difference]: Without dead ends: 128 [2021-11-02 22:40:07,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1123, Invalid=2069, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 22:40:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-02 22:40:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2021-11-02 22:40:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 122 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2021-11-02 22:40:07,312 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 112 [2021-11-02 22:40:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:07,312 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2021-11-02 22:40:07,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2021-11-02 22:40:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-02 22:40:07,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:07,315 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:07,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:07,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:07,515 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:07,516 INFO L85 PathProgramCache]: Analyzing trace with hash -676041675, now seen corresponding path program 22 times [2021-11-02 22:40:07,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:07,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209487005] [2021-11-02 22:40:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:07,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-02 22:40:07,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:07,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209487005] [2021-11-02 22:40:07,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209487005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:07,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782158489] [2021-11-02 22:40:07,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:40:07,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:07,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:07,861 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:07,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:40:08,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:40:08,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:08,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 22:40:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-02 22:40:08,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782158489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:08,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:08,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 22:40:08,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253748664] [2021-11-02 22:40:08,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:40:08,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:08,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:40:08,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:40:08,769 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:08,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:08,850 INFO L93 Difference]: Finished difference Result 202 states and 252 transitions. [2021-11-02 22:40:08,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 22:40:08,851 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 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 120 [2021-11-02 22:40:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:08,852 INFO L225 Difference]: With dead ends: 202 [2021-11-02 22:40:08,852 INFO L226 Difference]: Without dead ends: 126 [2021-11-02 22:40:08,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:40:08,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-02 22:40:08,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-11-02 22:40:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 124 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2021-11-02 22:40:08,859 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 120 [2021-11-02 22:40:08,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:08,859 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2021-11-02 22:40:08,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:08,860 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2021-11-02 22:40:08,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-02 22:40:08,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:08,861 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:08,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:09,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 22:40:09,078 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:09,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:09,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1137720521, now seen corresponding path program 23 times [2021-11-02 22:40:09,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:09,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272612601] [2021-11-02 22:40:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:09,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-02 22:40:09,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:09,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272612601] [2021-11-02 22:40:09,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272612601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:09,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121728134] [2021-11-02 22:40:09,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:40:09,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:09,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:09,506 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:09,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:40:21,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-02 22:40:21,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:21,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:40:21,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2021-11-02 22:40:21,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121728134] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:21,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:21,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2021-11-02 22:40:21,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127566501] [2021-11-02 22:40:21,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 22:40:21,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:21,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 22:40:21,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 22:40:21,941 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand has 38 states, 38 states have (on average 2.763157894736842) internal successors, (105), 38 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:22,476 INFO L93 Difference]: Finished difference Result 214 states and 270 transitions. [2021-11-02 22:40:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 22:40:22,476 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.763157894736842) internal successors, (105), 38 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-02 22:40:22,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:22,477 INFO L225 Difference]: With dead ends: 214 [2021-11-02 22:40:22,477 INFO L226 Difference]: Without dead ends: 138 [2021-11-02 22:40:22,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1327, Invalid=2455, Unknown=0, NotChecked=0, Total=3782 [2021-11-02 22:40:22,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-02 22:40:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2021-11-02 22:40:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.2121212121212122) internal successors, (160), 132 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2021-11-02 22:40:22,485 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 122 [2021-11-02 22:40:22,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:22,486 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2021-11-02 22:40:22,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.763157894736842) internal successors, (105), 38 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:22,486 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2021-11-02 22:40:22,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-02 22:40:22,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:22,487 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:22,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:22,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 22:40:22,706 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:22,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:22,706 INFO L85 PathProgramCache]: Analyzing trace with hash 185334129, now seen corresponding path program 24 times [2021-11-02 22:40:22,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:22,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727685581] [2021-11-02 22:40:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:22,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-02 22:40:23,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:23,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727685581] [2021-11-02 22:40:23,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727685581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:23,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076024511] [2021-11-02 22:40:23,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:40:23,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:23,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:23,122 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:23,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:40:41,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-02 22:40:41,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:41,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:40:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2021-11-02 22:40:42,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076024511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:42,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:42,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 40 [2021-11-02 22:40:42,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854161384] [2021-11-02 22:40:42,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-02 22:40:42,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:42,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-02 22:40:42,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 22:40:42,128 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand has 40 states, 40 states have (on average 2.75) internal successors, (110), 40 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:42,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:42,805 INFO L93 Difference]: Finished difference Result 228 states and 288 transitions. [2021-11-02 22:40:42,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 22:40:42,806 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.75) internal successors, (110), 40 states have internal predecessors, (110), 0 states have call successors, (0), 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 130 [2021-11-02 22:40:42,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:42,808 INFO L225 Difference]: With dead ends: 228 [2021-11-02 22:40:42,808 INFO L226 Difference]: Without dead ends: 146 [2021-11-02 22:40:42,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1455, Invalid=2705, Unknown=0, NotChecked=0, Total=4160 [2021-11-02 22:40:42,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-02 22:40:42,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 141. [2021-11-02 22:40:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.2142857142857142) internal successors, (170), 140 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 170 transitions. [2021-11-02 22:40:42,825 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 170 transitions. Word has length 130 [2021-11-02 22:40:42,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:42,825 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 170 transitions. [2021-11-02 22:40:42,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.75) internal successors, (110), 40 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:42,826 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 170 transitions. [2021-11-02 22:40:42,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-02 22:40:42,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:42,828 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:42,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:43,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:40:43,044 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:43,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2075563781, now seen corresponding path program 25 times [2021-11-02 22:40:43,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:43,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052491013] [2021-11-02 22:40:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:43,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2021-11-02 22:40:43,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:43,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052491013] [2021-11-02 22:40:43,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052491013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:43,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859937739] [2021-11-02 22:40:43,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:40:43,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:43,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:43,470 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:43,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:40:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:44,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 22:40:44,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2021-11-02 22:40:44,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859937739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:44,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:44,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 22:40:44,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479186869] [2021-11-02 22:40:44,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 22:40:44,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:44,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 22:40:44,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:40:44,506 INFO L87 Difference]: Start difference. First operand 141 states and 170 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:44,571 INFO L93 Difference]: Finished difference Result 232 states and 290 transitions. [2021-11-02 22:40:44,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:40:44,575 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 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 138 [2021-11-02 22:40:44,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:44,576 INFO L225 Difference]: With dead ends: 232 [2021-11-02 22:40:44,576 INFO L226 Difference]: Without dead ends: 144 [2021-11-02 22:40:44,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:40:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-02 22:40:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-11-02 22:40:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2112676056338028) internal successors, (172), 142 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 172 transitions. [2021-11-02 22:40:44,594 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 172 transitions. Word has length 138 [2021-11-02 22:40:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:44,594 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 172 transitions. [2021-11-02 22:40:44,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 172 transitions. [2021-11-02 22:40:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-02 22:40:44,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:44,597 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:44,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:44,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:44,810 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:44,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:44,810 INFO L85 PathProgramCache]: Analyzing trace with hash -493763715, now seen corresponding path program 26 times [2021-11-02 22:40:44,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:44,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207542652] [2021-11-02 22:40:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:44,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2021-11-02 22:40:45,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:45,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207542652] [2021-11-02 22:40:45,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207542652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:45,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080616191] [2021-11-02 22:40:45,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:40:45,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:45,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:45,326 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:45,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 22:40:46,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:40:46,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:46,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 22:40:46,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2021-11-02 22:40:46,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080616191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:46,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:46,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 22:40:46,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268591999] [2021-11-02 22:40:46,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 22:40:46,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:46,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 22:40:46,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:40:46,457 INFO L87 Difference]: Start difference. First operand 143 states and 172 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:46,526 INFO L93 Difference]: Finished difference Result 234 states and 292 transitions. [2021-11-02 22:40:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:40:46,527 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-02 22:40:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:46,528 INFO L225 Difference]: With dead ends: 234 [2021-11-02 22:40:46,528 INFO L226 Difference]: Without dead ends: 146 [2021-11-02 22:40:46,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:40:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-02 22:40:46,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-11-02 22:40:46,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2083333333333333) internal successors, (174), 144 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 174 transitions. [2021-11-02 22:40:46,535 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 174 transitions. Word has length 140 [2021-11-02 22:40:46,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:46,535 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 174 transitions. [2021-11-02 22:40:46,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:46,536 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 174 transitions. [2021-11-02 22:40:46,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-02 22:40:46,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:46,537 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:46,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:46,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:46,758 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:46,758 INFO L85 PathProgramCache]: Analyzing trace with hash -802323073, now seen corresponding path program 27 times [2021-11-02 22:40:46,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:46,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265449145] [2021-11-02 22:40:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:46,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2021-11-02 22:40:47,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:47,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265449145] [2021-11-02 22:40:47,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265449145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:47,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643828843] [2021-11-02 22:40:47,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:40:47,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:47,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:47,294 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:47,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 22:40:50,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-02 22:40:50,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:50,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:40:50,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2021-11-02 22:40:51,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643828843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:51,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:51,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16] total 44 [2021-11-02 22:40:51,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795445103] [2021-11-02 22:40:51,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-02 22:40:51,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:51,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-02 22:40:51,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 22:40:51,449 INFO L87 Difference]: Start difference. First operand 145 states and 174 transitions. Second operand has 44 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 44 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:52,218 INFO L93 Difference]: Finished difference Result 246 states and 310 transitions. [2021-11-02 22:40:52,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 22:40:52,218 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 44 states have internal predecessors, (119), 0 states have call successors, (0), 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 142 [2021-11-02 22:40:52,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:52,219 INFO L225 Difference]: With dead ends: 246 [2021-11-02 22:40:52,219 INFO L226 Difference]: Without dead ends: 158 [2021-11-02 22:40:52,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1786, Invalid=3326, Unknown=0, NotChecked=0, Total=5112 [2021-11-02 22:40:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-02 22:40:52,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 153. [2021-11-02 22:40:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.2105263157894737) internal successors, (184), 152 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:52,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 184 transitions. [2021-11-02 22:40:52,227 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 184 transitions. Word has length 142 [2021-11-02 22:40:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:52,227 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 184 transitions. [2021-11-02 22:40:52,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 44 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 184 transitions. [2021-11-02 22:40:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-02 22:40:52,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:52,229 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:52,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:52,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 22:40:52,434 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1604968775, now seen corresponding path program 28 times [2021-11-02 22:40:52,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:52,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776210679] [2021-11-02 22:40:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:52,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2021-11-02 22:40:52,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:52,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776210679] [2021-11-02 22:40:52,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776210679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:52,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190105643] [2021-11-02 22:40:52,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:40:52,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:52,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:52,998 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:53,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 22:40:54,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:40:54,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:54,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:40:54,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2021-11-02 22:40:54,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190105643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:54,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:54,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 17] total 46 [2021-11-02 22:40:54,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865122572] [2021-11-02 22:40:54,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 22:40:54,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 22:40:54,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1470, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 22:40:54,762 INFO L87 Difference]: Start difference. First operand 153 states and 184 transitions. Second operand has 46 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 46 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:55,499 INFO L93 Difference]: Finished difference Result 260 states and 328 transitions. [2021-11-02 22:40:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 22:40:55,514 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 46 states have internal predecessors, (124), 0 states have call successors, (0), 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 150 [2021-11-02 22:40:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:55,516 INFO L225 Difference]: With dead ends: 260 [2021-11-02 22:40:55,516 INFO L226 Difference]: Without dead ends: 166 [2021-11-02 22:40:55,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1934, Invalid=3616, Unknown=0, NotChecked=0, Total=5550 [2021-11-02 22:40:55,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-02 22:40:55,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2021-11-02 22:40:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.2125) internal successors, (194), 160 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 194 transitions. [2021-11-02 22:40:55,526 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 194 transitions. Word has length 150 [2021-11-02 22:40:55,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:55,526 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 194 transitions. [2021-11-02 22:40:55,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 46 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 194 transitions. [2021-11-02 22:40:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-02 22:40:55,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:55,528 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:55,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:55,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:55,750 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:55,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:55,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1313581757, now seen corresponding path program 29 times [2021-11-02 22:40:55,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:55,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900760927] [2021-11-02 22:40:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:55,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2021-11-02 22:40:56,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:56,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900760927] [2021-11-02 22:40:56,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900760927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:56,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163664548] [2021-11-02 22:40:56,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:40:56,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:56,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:56,273 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:56,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 22:44:31,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-11-02 22:44:31,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:32,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:44:32,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1171 trivial. 0 not checked. [2021-11-02 22:44:32,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163664548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:32,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:32,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 18] total 48 [2021-11-02 22:44:32,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487232316] [2021-11-02 22:44:32,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-02 22:44:32,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:32,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-02 22:44:32,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=1608, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:44:32,791 INFO L87 Difference]: Start difference. First operand 161 states and 194 transitions. Second operand has 48 states, 48 states have (on average 2.6875) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:33,538 INFO L93 Difference]: Finished difference Result 274 states and 346 transitions. [2021-11-02 22:44:33,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 22:44:33,541 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6875) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 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 158 [2021-11-02 22:44:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:33,543 INFO L225 Difference]: With dead ends: 274 [2021-11-02 22:44:33,543 INFO L226 Difference]: Without dead ends: 174 [2021-11-02 22:44:33,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2088, Invalid=3918, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 22:44:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-02 22:44:33,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2021-11-02 22:44:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.2142857142857142) internal successors, (204), 168 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 204 transitions. [2021-11-02 22:44:33,552 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 204 transitions. Word has length 158 [2021-11-02 22:44:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:33,553 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 204 transitions. [2021-11-02 22:44:33,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.6875) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 204 transitions. [2021-11-02 22:44:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-02 22:44:33,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:33,555 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:33,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:33,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:33,758 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:33,758 INFO L85 PathProgramCache]: Analyzing trace with hash -303295107, now seen corresponding path program 30 times [2021-11-02 22:44:33,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:33,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518886678] [2021-11-02 22:44:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:33,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2021-11-02 22:44:34,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:34,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518886678] [2021-11-02 22:44:34,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518886678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:34,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10193895] [2021-11-02 22:44:34,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:44:34,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:34,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:34,482 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:34,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 22:45:57,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-02 22:45:57,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:45:57,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 22:45:57,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:45:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-02 22:45:58,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10193895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:58,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:45:58,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19] total 50 [2021-11-02 22:45:58,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744991562] [2021-11-02 22:45:58,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-02 22:45:58,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-02 22:45:58,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 22:45:58,110 INFO L87 Difference]: Start difference. First operand 169 states and 204 transitions. Second operand has 50 states, 50 states have (on average 2.58) internal successors, (129), 50 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:45:58,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:58,874 INFO L93 Difference]: Finished difference Result 288 states and 364 transitions. [2021-11-02 22:45:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 22:45:58,874 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.58) internal successors, (129), 50 states have internal predecessors, (129), 0 states have call successors, (0), 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 166 [2021-11-02 22:45:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:58,875 INFO L225 Difference]: With dead ends: 288 [2021-11-02 22:45:58,875 INFO L226 Difference]: Without dead ends: 182 [2021-11-02 22:45:58,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2248, Invalid=4232, Unknown=0, NotChecked=0, Total=6480 [2021-11-02 22:45:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-02 22:45:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 177. [2021-11-02 22:45:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.2159090909090908) internal successors, (214), 176 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:45:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 214 transitions. [2021-11-02 22:45:58,883 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 214 transitions. Word has length 166 [2021-11-02 22:45:58,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:58,883 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 214 transitions. [2021-11-02 22:45:58,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.58) internal successors, (129), 50 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:45:58,883 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 214 transitions. [2021-11-02 22:45:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-02 22:45:58,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:58,885 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:45:58,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 22:45:59,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:59,098 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:45:59,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:59,098 INFO L85 PathProgramCache]: Analyzing trace with hash -312551673, now seen corresponding path program 31 times [2021-11-02 22:45:59,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:59,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965679816] [2021-11-02 22:45:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:59,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1811 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2021-11-02 22:45:59,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:59,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965679816] [2021-11-02 22:45:59,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965679816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:59,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181305568] [2021-11-02 22:45:59,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:45:59,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:59,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:45:59,678 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:45:59,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 22:46:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:00,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 22:46:00,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:46:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1811 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2021-11-02 22:46:00,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181305568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:00,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:46:00,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-02 22:46:00,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145273556] [2021-11-02 22:46:00,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 22:46:00,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:46:00,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 22:46:00,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:46:00,966 INFO L87 Difference]: Start difference. First operand 177 states and 214 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 35 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) [2021-11-02 22:46:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:01,097 INFO L93 Difference]: Finished difference Result 292 states and 366 transitions. [2021-11-02 22:46:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 22:46:01,098 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 35 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) Word has length 174 [2021-11-02 22:46:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:01,099 INFO L225 Difference]: With dead ends: 292 [2021-11-02 22:46:01,099 INFO L226 Difference]: Without dead ends: 180 [2021-11-02 22:46:01,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:46:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-02 22:46:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-11-02 22:46:01,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.2134831460674158) internal successors, (216), 178 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 216 transitions. [2021-11-02 22:46:01,109 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 216 transitions. Word has length 174 [2021-11-02 22:46:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:01,109 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 216 transitions. [2021-11-02 22:46:01,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 35 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) [2021-11-02 22:46:01,110 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 216 transitions. [2021-11-02 22:46:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-02 22:46:01,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:46:01,112 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:46:01,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 22:46:01,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 22:46:01,332 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:46:01,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:01,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1019504503, now seen corresponding path program 32 times [2021-11-02 22:46:01,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:46:01,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047036847] [2021-11-02 22:46:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:01,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:46:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1874 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2021-11-02 22:46:02,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:46:02,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047036847] [2021-11-02 22:46:02,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047036847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:02,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348738208] [2021-11-02 22:46:02,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:46:02,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:46:02,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:46:02,067 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:46:02,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 22:46:03,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:46:03,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:46:03,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-02 22:46:03,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:46:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1874 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2021-11-02 22:46:03,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348738208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:03,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:46:03,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-02 22:46:03,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507072458] [2021-11-02 22:46:03,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 22:46:03,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:46:03,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 22:46:03,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:46:03,611 INFO L87 Difference]: Start difference. First operand 179 states and 216 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:03,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:03,702 INFO L93 Difference]: Finished difference Result 294 states and 368 transitions. [2021-11-02 22:46:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 22:46:03,714 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 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 176 [2021-11-02 22:46:03,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:03,716 INFO L225 Difference]: With dead ends: 294 [2021-11-02 22:46:03,716 INFO L226 Difference]: Without dead ends: 182 [2021-11-02 22:46:03,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:46:03,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-02 22:46:03,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-11-02 22:46:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.211111111111111) internal successors, (218), 180 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 218 transitions. [2021-11-02 22:46:03,724 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 218 transitions. Word has length 176 [2021-11-02 22:46:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:03,725 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 218 transitions. [2021-11-02 22:46:03,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 218 transitions. [2021-11-02 22:46:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-02 22:46:03,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:46:03,727 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:46:03,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 22:46:03,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 22:46:03,950 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:46:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:03,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1796341365, now seen corresponding path program 33 times [2021-11-02 22:46:03,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:46:03,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816804268] [2021-11-02 22:46:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:03,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:46:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2021-11-02 22:46:04,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:46:04,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816804268] [2021-11-02 22:46:04,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816804268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:04,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235549460] [2021-11-02 22:46:04,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:46:04,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:46:04,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:46:04,702 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:46:04,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 22:46:17,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-02 22:46:17,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:46:17,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:46:17,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:46:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1514 trivial. 0 not checked. [2021-11-02 22:46:17,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235549460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:17,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:46:17,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 20] total 54 [2021-11-02 22:46:17,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280448045] [2021-11-02 22:46:17,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-02 22:46:17,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:46:17,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-02 22:46:17,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=2043, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 22:46:17,939 INFO L87 Difference]: Start difference. First operand 181 states and 218 transitions. Second operand has 54 states, 54 states have (on average 2.5555555555555554) internal successors, (138), 54 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:18,875 INFO L93 Difference]: Finished difference Result 306 states and 386 transitions. [2021-11-02 22:46:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 22:46:18,876 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.5555555555555554) internal successors, (138), 54 states have internal predecessors, (138), 0 states have call successors, (0), 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 178 [2021-11-02 22:46:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:18,877 INFO L225 Difference]: With dead ends: 306 [2021-11-02 22:46:18,877 INFO L226 Difference]: Without dead ends: 194 [2021-11-02 22:46:18,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2655, Invalid=5001, Unknown=0, NotChecked=0, Total=7656 [2021-11-02 22:46:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-02 22:46:18,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 189. [2021-11-02 22:46:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.2127659574468086) internal successors, (228), 188 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 228 transitions. [2021-11-02 22:46:18,887 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 228 transitions. Word has length 178 [2021-11-02 22:46:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:18,887 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 228 transitions. [2021-11-02 22:46:18,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.5555555555555554) internal successors, (138), 54 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 228 transitions. [2021-11-02 22:46:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-02 22:46:18,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:46:18,890 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:46:18,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 22:46:19,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:46:19,114 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:46:19,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:19,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1274815685, now seen corresponding path program 34 times [2021-11-02 22:46:19,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:46:19,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781264166] [2021-11-02 22:46:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:19,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:46:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2110 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2021-11-02 22:46:19,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:46:19,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781264166] [2021-11-02 22:46:19,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781264166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:19,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074310360] [2021-11-02 22:46:19,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:46:19,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:46:19,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:46:19,883 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:46:19,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 22:46:21,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:46:21,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:46:21,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 22:46:21,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:46:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2110 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2021-11-02 22:46:21,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074310360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:21,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:46:21,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-02 22:46:21,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398615699] [2021-11-02 22:46:21,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 22:46:21,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:46:21,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 22:46:21,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 22:46:21,880 INFO L87 Difference]: Start difference. First operand 189 states and 228 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:22,001 INFO L93 Difference]: Finished difference Result 310 states and 388 transitions. [2021-11-02 22:46:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 22:46:22,002 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-02 22:46:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:22,004 INFO L225 Difference]: With dead ends: 310 [2021-11-02 22:46:22,004 INFO L226 Difference]: Without dead ends: 192 [2021-11-02 22:46:22,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 22:46:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-02 22:46:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-11-02 22:46:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.2105263157894737) internal successors, (230), 190 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:22,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 230 transitions. [2021-11-02 22:46:22,012 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 230 transitions. Word has length 186 [2021-11-02 22:46:22,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:22,013 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 230 transitions. [2021-11-02 22:46:22,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:22,014 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 230 transitions. [2021-11-02 22:46:22,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-02 22:46:22,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:46:22,015 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:46:22,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-02 22:46:22,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:46:22,242 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:46:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:22,242 INFO L85 PathProgramCache]: Analyzing trace with hash 508080967, now seen corresponding path program 35 times [2021-11-02 22:46:22,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:46:22,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221186638] [2021-11-02 22:46:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:22,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:46:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2179 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2021-11-02 22:46:23,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:46:23,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221186638] [2021-11-02 22:46:23,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221186638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:23,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109460153] [2021-11-02 22:46:23,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:46:23,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:46:23,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:46:23,118 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:46:23,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb42183-0c25-4546-9aa3-ec6f7896d585/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process