./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/break-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_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/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_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-lopstr16/break-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/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_0f4279a6-0e64-4bae-92d0-88f4accd873c/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 af12e42a5d3a022d66b7920ff01dec158b3de4df470747e943653bc7f1da2cc9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:07:16,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:07:16,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:07:16,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:07:16,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:07:16,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:07:16,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:07:16,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:07:16,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:07:16,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:07:16,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:07:16,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:07:16,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:07:16,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:07:16,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:07:16,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:07:16,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:07:16,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:07:16,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:07:16,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:07:16,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:07:16,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:07:16,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:07:16,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:07:16,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:07:16,378 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:07:16,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:07:16,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:07:16,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:07:16,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:07:16,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:07:16,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:07:16,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:07:16,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:07:16,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:07:16,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:07:16,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:07:16,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:07:16,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:07:16,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:07:16,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:07:16,392 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:07:16,435 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:07:16,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:07:16,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:07:16,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:07:16,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:07:16,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:07:16,440 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:07:16,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:07:16,440 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:07:16,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:07:16,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:07:16,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:07:16,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:07:16,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:07:16,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:07:16,443 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:07:16,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:07:16,444 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:07:16,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:07:16,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:07:16,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:07:16,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:07:16,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:07:16,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:07:16,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:07:16,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:07:16,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:07:16,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:07:16,446 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:07:16,447 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:07:16,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:07:16,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:07:16,447 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_0f4279a6-0e64-4bae-92d0-88f4accd873c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af12e42a5d3a022d66b7920ff01dec158b3de4df470747e943653bc7f1da2cc9 [2021-11-02 23:07:16,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:07:16,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:07:16,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:07:16,760 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:07:16,761 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:07:16,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-lopstr16/break-2.i [2021-11-02 23:07:16,853 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/data/e27d17455/cbacae1a7a8f4a9bab7e22133710ab41/FLAGa9e2807c4 [2021-11-02 23:07:17,293 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:07:17,294 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/sv-benchmarks/c/array-lopstr16/break-2.i [2021-11-02 23:07:17,304 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/data/e27d17455/cbacae1a7a8f4a9bab7e22133710ab41/FLAGa9e2807c4 [2021-11-02 23:07:17,695 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/data/e27d17455/cbacae1a7a8f4a9bab7e22133710ab41 [2021-11-02 23:07:17,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:07:17,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:07:17,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:07:17,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:07:17,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:07:17,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:07:17" (1/1) ... [2021-11-02 23:07:17,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@146a191c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:17, skipping insertion in model container [2021-11-02 23:07:17,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:07:17" (1/1) ... [2021-11-02 23:07:17,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:07:17,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:07:17,873 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_0f4279a6-0e64-4bae-92d0-88f4accd873c/sv-benchmarks/c/array-lopstr16/break-2.i[800,813] [2021-11-02 23:07:17,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:07:24,513 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:07:24,527 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_0f4279a6-0e64-4bae-92d0-88f4accd873c/sv-benchmarks/c/array-lopstr16/break-2.i[800,813] [2021-11-02 23:07:24,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:07:24,550 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:07:24,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:24 WrapperNode [2021-11-02 23:07:24,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:07:24,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:07:24,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:07:24,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:07:24,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:24" (1/1) ... [2021-11-02 23:07:24,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:24" (1/1) ... [2021-11-02 23:07:24,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:07:24,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:07:24,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:07:24,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:07:24,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:24" (1/1) ... [2021-11-02 23:07:24,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:24" (1/1) ... [2021-11-02 23:07:24,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:24" (1/1) ... [2021-11-02 23:07:24,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:24" (1/1) ... [2021-11-02 23:07:24,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:24" (1/1) ... [2021-11-02 23:07:24,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:24" (1/1) ... [2021-11-02 23:07:24,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:24" (1/1) ... [2021-11-02 23:07:24,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:07:24,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:07:24,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:07:24,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:07:24,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:24" (1/1) ... [2021-11-02 23:07:24,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:07:24,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:24,665 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:07:24,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:07:24,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:07:24,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:07:24,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 23:07:24,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:07:24,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:07:24,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 23:07:24,965 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:07:24,965 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-02 23:07:24,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:07:24 BoogieIcfgContainer [2021-11-02 23:07:24,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:07:24,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:07:24,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:07:24,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:07:24,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:07:17" (1/3) ... [2021-11-02 23:07:24,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1892a4ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:07:24, skipping insertion in model container [2021-11-02 23:07:24,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:24" (2/3) ... [2021-11-02 23:07:24,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1892a4ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:07:24, skipping insertion in model container [2021-11-02 23:07:24,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:07:24" (3/3) ... [2021-11-02 23:07:24,977 INFO L111 eAbstractionObserver]: Analyzing ICFG break-2.i [2021-11-02 23:07:24,982 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:07:24,982 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:07:25,031 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:07:25,038 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 23:07:25,038 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:07:25,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-02 23:07:25,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:25,058 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:25,058 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:25,079 INFO L85 PathProgramCache]: Analyzing trace with hash 531796522, now seen corresponding path program 1 times [2021-11-02 23:07:25,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:25,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696168587] [2021-11-02 23:07:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:25,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,253 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 23:07:25,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:25,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696168587] [2021-11-02 23:07:25,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696168587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:25,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:25,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:07:25,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137200097] [2021-11-02 23:07:25,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 23:07:25,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:25,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 23:07:25,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:07:25,280 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:25,294 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-02 23:07:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 23:07:25,296 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-02 23:07:25,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:25,304 INFO L225 Difference]: With dead ends: 29 [2021-11-02 23:07:25,305 INFO L226 Difference]: Without dead ends: 13 [2021-11-02 23:07:25,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:07:25,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-02 23:07:25,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-02 23:07:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-02 23:07:25,338 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-11-02 23:07:25,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:25,339 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-02 23:07:25,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,339 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-02 23:07:25,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-02 23:07:25,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:25,340 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:25,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:07:25,341 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:25,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash 216875861, now seen corresponding path program 1 times [2021-11-02 23:07:25,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:25,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902027886] [2021-11-02 23:07:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:25,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,390 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 23:07:25,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:25,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902027886] [2021-11-02 23:07:25,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902027886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:25,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:25,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:07:25,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037111071] [2021-11-02 23:07:25,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:07:25,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:25,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:07:25,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:25,397 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:25,454 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-11-02 23:07:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:07:25,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-02 23:07:25,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:25,455 INFO L225 Difference]: With dead ends: 31 [2021-11-02 23:07:25,456 INFO L226 Difference]: Without dead ends: 23 [2021-11-02 23:07:25,457 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 23:07:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-02 23:07:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2021-11-02 23:07:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-02 23:07:25,462 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2021-11-02 23:07:25,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:25,462 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-02 23:07:25,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,463 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-02 23:07:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 23:07:25,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:25,464 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:25,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:07:25,464 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:25,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1665715163, now seen corresponding path program 1 times [2021-11-02 23:07:25,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:25,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391614373] [2021-11-02 23:07:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:25,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:25,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:25,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391614373] [2021-11-02 23:07:25,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391614373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:25,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647510301] [2021-11-02 23:07:25,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:25,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:25,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:25,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:25,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:07:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:07:25,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:25,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647510301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:25,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:25,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 23:07:25,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936348398] [2021-11-02 23:07:25,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:07:25,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:25,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:07:25,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:07:25,684 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:25,740 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-11-02 23:07:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:07:25,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 23:07:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:25,742 INFO L225 Difference]: With dead ends: 43 [2021-11-02 23:07:25,742 INFO L226 Difference]: Without dead ends: 33 [2021-11-02 23:07:25,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 23:07:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-02 23:07:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-11-02 23:07:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-02 23:07:25,755 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2021-11-02 23:07:25,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:25,755 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-02 23:07:25,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,756 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-02 23:07:25,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 23:07:25,756 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:25,771 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:25,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:25,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:25,988 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:25,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:25,988 INFO L85 PathProgramCache]: Analyzing trace with hash -383963755, now seen corresponding path program 2 times [2021-11-02 23:07:25,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:25,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938121177] [2021-11-02 23:07:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:25,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:07:26,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:26,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938121177] [2021-11-02 23:07:26,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938121177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:26,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:26,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:07:26,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364724875] [2021-11-02 23:07:26,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:07:26,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:26,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:07:26,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:07:26,048 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:26,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:26,106 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-11-02 23:07:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:07:26,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-02 23:07:26,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:26,108 INFO L225 Difference]: With dead ends: 44 [2021-11-02 23:07:26,108 INFO L226 Difference]: Without dead ends: 29 [2021-11-02 23:07:26,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:07:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-02 23:07:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-11-02 23:07:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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 23:07:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-02 23:07:26,120 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2021-11-02 23:07:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:26,121 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-02 23:07:26,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-02 23:07:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:07:26,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:26,122 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:26,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:07:26,122 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:26,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:26,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1774448108, now seen corresponding path program 1 times [2021-11-02 23:07:26,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:26,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293738374] [2021-11-02 23:07:26,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:26,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:26,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:26,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293738374] [2021-11-02 23:07:26,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293738374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:26,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831622306] [2021-11-02 23:07:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:26,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:26,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:26,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:26,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:07:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:07:26,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:26,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831622306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:26,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:26,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-11-02 23:07:26,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31266560] [2021-11-02 23:07:26,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:07:26,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:26,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:07:26,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:07:26,470 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 23:07:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:26,710 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-11-02 23:07:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:07:26,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 15 [2021-11-02 23:07:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:26,714 INFO L225 Difference]: With dead ends: 56 [2021-11-02 23:07:26,714 INFO L226 Difference]: Without dead ends: 41 [2021-11-02 23:07:26,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:07:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-02 23:07:26,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-11-02 23:07:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-11-02 23:07:26,733 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 15 [2021-11-02 23:07:26,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:26,734 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-11-02 23:07:26,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 23:07:26,735 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-11-02 23:07:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:07:26,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:26,737 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:26,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-02 23:07:26,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:26,952 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:26,952 INFO L85 PathProgramCache]: Analyzing trace with hash -165523003, now seen corresponding path program 1 times [2021-11-02 23:07:26,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:26,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253967087] [2021-11-02 23:07:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:26,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:27,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:27,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253967087] [2021-11-02 23:07:27,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253967087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:27,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431913496] [2021-11-02 23:07:27,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:27,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:27,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:27,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:27,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:07:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:27,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:07:27,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:27,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431913496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:27,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:27,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-02 23:07:27,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018591200] [2021-11-02 23:07:27,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:07:27,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:07:27,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:07:27,232 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:27,289 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-11-02 23:07:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:07:27,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-02 23:07:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:27,291 INFO L225 Difference]: With dead ends: 71 [2021-11-02 23:07:27,291 INFO L226 Difference]: Without dead ends: 51 [2021-11-02 23:07:27,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:07:27,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-02 23:07:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2021-11-02 23:07:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 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 23:07:27,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-02 23:07:27,312 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 23 [2021-11-02 23:07:27,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:27,313 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-02 23:07:27,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:27,313 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-02 23:07:27,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:07:27,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:27,315 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:27,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:27,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 23:07:27,530 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:27,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:27,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1319103615, now seen corresponding path program 2 times [2021-11-02 23:07:27,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:27,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210147916] [2021-11-02 23:07:27,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:27,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:27,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:27,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210147916] [2021-11-02 23:07:27,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210147916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:27,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535058263] [2021-11-02 23:07:27,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:07:27,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:27,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:27,640 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:27,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:07:27,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:07:27,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:27,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:07:27,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:27,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535058263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:27,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:27,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-02 23:07:27,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518517592] [2021-11-02 23:07:27,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:07:27,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:27,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:07:27,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:07:27,813 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 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 23:07:27,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:27,886 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-11-02 23:07:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:07:27,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-02 23:07:27,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:27,887 INFO L225 Difference]: With dead ends: 86 [2021-11-02 23:07:27,887 INFO L226 Difference]: Without dead ends: 61 [2021-11-02 23:07:27,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 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 23:07:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-02 23:07:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2021-11-02 23:07:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 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 23:07:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-11-02 23:07:27,894 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 26 [2021-11-02 23:07:27,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:27,894 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-11-02 23:07:27,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 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 23:07:27,895 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-11-02 23:07:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:07:27,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:27,896 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:27,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:28,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 23:07:28,117 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:28,117 INFO L85 PathProgramCache]: Analyzing trace with hash 257466245, now seen corresponding path program 3 times [2021-11-02 23:07:28,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:28,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559901090] [2021-11-02 23:07:28,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:28,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:28,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:28,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559901090] [2021-11-02 23:07:28,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559901090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:28,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919703254] [2021-11-02 23:07:28,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:07:28,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:28,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:28,227 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:28,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:07:28,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 23:07:28,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:28,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:07:28,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:28,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919703254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:28,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:28,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-02 23:07:28,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519710444] [2021-11-02 23:07:28,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:07:28,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:28,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:07:28,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:07:28,396 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:28,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:28,472 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2021-11-02 23:07:28,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:07:28,473 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-02 23:07:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:28,473 INFO L225 Difference]: With dead ends: 101 [2021-11-02 23:07:28,474 INFO L226 Difference]: Without dead ends: 71 [2021-11-02 23:07:28,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:07:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-02 23:07:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2021-11-02 23:07:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.125) internal successors, (63), 56 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 23:07:28,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-11-02 23:07:28,481 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 29 [2021-11-02 23:07:28,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:28,481 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-11-02 23:07:28,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:28,481 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-11-02 23:07:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:07:28,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:28,482 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:28,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:28,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:28,696 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:28,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:28,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1157744319, now seen corresponding path program 4 times [2021-11-02 23:07:28,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:28,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018151156] [2021-11-02 23:07:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:28,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:28,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:28,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018151156] [2021-11-02 23:07:28,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018151156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:28,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169893972] [2021-11-02 23:07:28,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:07:28,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:28,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:28,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:28,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:07:28,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:07:28,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:28,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:07:28,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:29,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169893972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:29,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:29,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-02 23:07:29,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892388456] [2021-11-02 23:07:29,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:07:29,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:29,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:07:29,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:07:29,026 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:29,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:29,276 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2021-11-02 23:07:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:07:29,276 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:07:29,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:29,277 INFO L225 Difference]: With dead ends: 116 [2021-11-02 23:07:29,277 INFO L226 Difference]: Without dead ends: 81 [2021-11-02 23:07:29,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:07:29,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-02 23:07:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-11-02 23:07:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 64 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 23:07:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-11-02 23:07:29,285 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 32 [2021-11-02 23:07:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:29,286 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-11-02 23:07:29,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-11-02 23:07:29,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:07:29,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:29,287 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:29,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:29,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:29,507 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:29,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:29,508 INFO L85 PathProgramCache]: Analyzing trace with hash -728916667, now seen corresponding path program 5 times [2021-11-02 23:07:29,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:29,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223358818] [2021-11-02 23:07:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:29,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:29,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:29,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223358818] [2021-11-02 23:07:29,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223358818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:29,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064630825] [2021-11-02 23:07:29,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:07:29,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:29,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:29,645 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:29,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:07:29,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-02 23:07:29,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:29,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:07:29,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:29,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064630825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:29,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:29,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 23:07:29,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222026934] [2021-11-02 23:07:29,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:07:29,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:29,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:07:29,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:07:29,865 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:29,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:29,947 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2021-11-02 23:07:29,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:07:29,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 23:07:29,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:29,949 INFO L225 Difference]: With dead ends: 131 [2021-11-02 23:07:29,949 INFO L226 Difference]: Without dead ends: 91 [2021-11-02 23:07:29,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 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 23:07:29,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-02 23:07:29,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2021-11-02 23:07:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.125) internal successors, (81), 72 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 23:07:29,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2021-11-02 23:07:29,957 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 35 [2021-11-02 23:07:29,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:29,958 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2021-11-02 23:07:29,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:29,958 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2021-11-02 23:07:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 23:07:29,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:29,960 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:29,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:30,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:07:30,176 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:30,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1990652159, now seen corresponding path program 6 times [2021-11-02 23:07:30,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:30,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166163370] [2021-11-02 23:07:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:30,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:30,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:30,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166163370] [2021-11-02 23:07:30,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166163370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:30,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311564743] [2021-11-02 23:07:30,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:07:30,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:30,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:30,296 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:30,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:07:30,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-02 23:07:30,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:30,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:07:30,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:30,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311564743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:30,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:30,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 23:07:30,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642618448] [2021-11-02 23:07:30,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:07:30,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:30,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:07:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:07:30,565 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:30,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:30,663 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2021-11-02 23:07:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:07:30,664 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-02 23:07:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:30,667 INFO L225 Difference]: With dead ends: 146 [2021-11-02 23:07:30,667 INFO L226 Difference]: Without dead ends: 101 [2021-11-02 23:07:30,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 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 23:07:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-02 23:07:30,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2021-11-02 23:07:30,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.125) internal successors, (90), 80 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 23:07:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2021-11-02 23:07:30,686 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 38 [2021-11-02 23:07:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:30,688 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2021-11-02 23:07:30,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:30,688 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2021-11-02 23:07:30,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:07:30,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:30,691 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:30,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:30,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 23:07:30,903 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:30,904 INFO L85 PathProgramCache]: Analyzing trace with hash 402475781, now seen corresponding path program 7 times [2021-11-02 23:07:30,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:30,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687466748] [2021-11-02 23:07:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:30,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:31,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:31,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687466748] [2021-11-02 23:07:31,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687466748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:31,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750866477] [2021-11-02 23:07:31,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:07:31,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:31,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:31,022 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:31,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:07:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:31,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:07:31,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:31,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750866477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:31,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:31,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-02 23:07:31,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403083975] [2021-11-02 23:07:31,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:07:31,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:07:31,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:07:31,250 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:31,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:31,344 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2021-11-02 23:07:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:07:31,345 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:07:31,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:31,346 INFO L225 Difference]: With dead ends: 161 [2021-11-02 23:07:31,346 INFO L226 Difference]: Without dead ends: 111 [2021-11-02 23:07:31,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:07:31,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-02 23:07:31,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2021-11-02 23:07:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.125) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 23:07:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-11-02 23:07:31,367 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 41 [2021-11-02 23:07:31,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:31,367 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-11-02 23:07:31,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-11-02 23:07:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 23:07:31,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:31,372 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:31,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:31,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 23:07:31,573 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:31,573 INFO L85 PathProgramCache]: Analyzing trace with hash 399731519, now seen corresponding path program 8 times [2021-11-02 23:07:31,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:31,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823375251] [2021-11-02 23:07:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:31,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:31,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:31,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823375251] [2021-11-02 23:07:31,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823375251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:31,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101985160] [2021-11-02 23:07:31,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:07:31,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:31,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:31,751 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:31,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:07:31,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:07:31,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:31,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:07:31,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:32,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101985160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:32,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:32,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 23:07:32,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932529803] [2021-11-02 23:07:32,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:07:32,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:32,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:07:32,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:07:32,021 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:32,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:32,121 INFO L93 Difference]: Finished difference Result 176 states and 189 transitions. [2021-11-02 23:07:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:07:32,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-02 23:07:32,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:32,123 INFO L225 Difference]: With dead ends: 176 [2021-11-02 23:07:32,123 INFO L226 Difference]: Without dead ends: 121 [2021-11-02 23:07:32,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 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 23:07:32,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-02 23:07:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-11-02 23:07:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.125) internal successors, (108), 96 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 23:07:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2021-11-02 23:07:32,129 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 44 [2021-11-02 23:07:32,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:32,130 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2021-11-02 23:07:32,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:32,130 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2021-11-02 23:07:32,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 23:07:32,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:32,131 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:32,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:32,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 23:07:32,347 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:32,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:32,348 INFO L85 PathProgramCache]: Analyzing trace with hash 249800901, now seen corresponding path program 9 times [2021-11-02 23:07:32,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:32,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124164967] [2021-11-02 23:07:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:32,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:32,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:32,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124164967] [2021-11-02 23:07:32,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124164967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:32,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839838236] [2021-11-02 23:07:32,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:07:32,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:32,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:32,503 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:32,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:07:32,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-02 23:07:32,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:32,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:07:32,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:32,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839838236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:32,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:32,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 23:07:32,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031155125] [2021-11-02 23:07:32,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:07:32,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:32,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:07:32,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:07:32,850 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:32,973 INFO L93 Difference]: Finished difference Result 191 states and 205 transitions. [2021-11-02 23:07:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:07:32,974 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-02 23:07:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:32,976 INFO L225 Difference]: With dead ends: 191 [2021-11-02 23:07:32,976 INFO L226 Difference]: Without dead ends: 131 [2021-11-02 23:07:32,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 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 23:07:32,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-02 23:07:32,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 105. [2021-11-02 23:07:32,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.125) internal successors, (117), 104 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 23:07:32,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-11-02 23:07:32,984 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 47 [2021-11-02 23:07:32,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:32,986 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-11-02 23:07:32,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:32,986 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-11-02 23:07:32,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 23:07:32,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:32,987 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:33,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:33,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 23:07:33,211 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:33,212 INFO L85 PathProgramCache]: Analyzing trace with hash 432747903, now seen corresponding path program 10 times [2021-11-02 23:07:33,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:33,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659764986] [2021-11-02 23:07:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:33,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:33,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:33,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659764986] [2021-11-02 23:07:33,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659764986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:33,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798578046] [2021-11-02 23:07:33,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:07:33,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:33,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:33,370 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:33,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:07:33,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:07:33,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:33,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:07:33,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:33,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798578046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:33,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:33,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:07:33,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336922395] [2021-11-02 23:07:33,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:07:33,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:33,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:07:33,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:07:33,680 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 23:07:33,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:33,792 INFO L93 Difference]: Finished difference Result 206 states and 221 transitions. [2021-11-02 23:07:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:07:33,793 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 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 50 [2021-11-02 23:07:33,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:33,794 INFO L225 Difference]: With dead ends: 206 [2021-11-02 23:07:33,794 INFO L226 Difference]: Without dead ends: 141 [2021-11-02 23:07:33,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:07:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-02 23:07:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-11-02 23:07:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.125) internal successors, (126), 112 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:33,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2021-11-02 23:07:33,805 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 50 [2021-11-02 23:07:33,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:33,806 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2021-11-02 23:07:33,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 23:07:33,806 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2021-11-02 23:07:33,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:07:33,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:33,809 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:33,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:34,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:34,023 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:34,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:34,024 INFO L85 PathProgramCache]: Analyzing trace with hash 293385861, now seen corresponding path program 11 times [2021-11-02 23:07:34,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:34,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363197199] [2021-11-02 23:07:34,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:34,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:34,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:34,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363197199] [2021-11-02 23:07:34,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363197199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:34,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183667420] [2021-11-02 23:07:34,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:07:34,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:34,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:34,187 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:34,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:07:34,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-02 23:07:34,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:34,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:07:34,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:34,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183667420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:34,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:34,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:07:34,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452276957] [2021-11-02 23:07:34,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:07:34,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:34,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:07:34,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:07:34,627 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:34,758 INFO L93 Difference]: Finished difference Result 221 states and 237 transitions. [2021-11-02 23:07:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:07:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 23:07:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:34,761 INFO L225 Difference]: With dead ends: 221 [2021-11-02 23:07:34,761 INFO L226 Difference]: Without dead ends: 151 [2021-11-02 23:07:34,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 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 23:07:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-02 23:07:34,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 121. [2021-11-02 23:07:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.125) internal successors, (135), 120 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2021-11-02 23:07:34,769 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 53 [2021-11-02 23:07:34,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:34,770 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2021-11-02 23:07:34,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:34,770 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2021-11-02 23:07:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:07:34,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:34,771 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:34,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:34,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:07:34,975 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1792167871, now seen corresponding path program 12 times [2021-11-02 23:07:34,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:34,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064973981] [2021-11-02 23:07:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:34,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:35,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:35,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064973981] [2021-11-02 23:07:35,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064973981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:35,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406292071] [2021-11-02 23:07:35,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:07:35,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:35,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:35,145 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:35,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:07:35,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-02 23:07:35,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:35,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:07:35,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:35,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406292071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:35,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:35,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:07:35,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541398634] [2021-11-02 23:07:35,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:07:35,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:35,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:07:35,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:07:35,762 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 23:07:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:35,892 INFO L93 Difference]: Finished difference Result 236 states and 253 transitions. [2021-11-02 23:07:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:07:35,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 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 23:07:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:35,894 INFO L225 Difference]: With dead ends: 236 [2021-11-02 23:07:35,894 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 23:07:35,894 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 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 23:07:35,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 23:07:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 129. [2021-11-02 23:07:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.125) internal successors, (144), 128 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2021-11-02 23:07:35,902 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 56 [2021-11-02 23:07:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:35,903 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2021-11-02 23:07:35,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 23:07:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2021-11-02 23:07:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 23:07:35,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:35,904 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:35,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:36,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:07:36,115 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:36,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:36,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1527018565, now seen corresponding path program 13 times [2021-11-02 23:07:36,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:36,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009871133] [2021-11-02 23:07:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:36,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:36,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:36,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009871133] [2021-11-02 23:07:36,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009871133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:36,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698776231] [2021-11-02 23:07:36,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:07:36,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:36,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:36,337 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:36,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:07:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:36,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:07:36,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:36,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698776231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:36,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:36,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:07:36,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092038259] [2021-11-02 23:07:36,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:07:36,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:07:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:07:36,722 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 23:07:36,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:36,869 INFO L93 Difference]: Finished difference Result 251 states and 269 transitions. [2021-11-02 23:07:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:07:36,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 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 59 [2021-11-02 23:07:36,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:36,871 INFO L225 Difference]: With dead ends: 251 [2021-11-02 23:07:36,871 INFO L226 Difference]: Without dead ends: 171 [2021-11-02 23:07:36,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:07:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-02 23:07:36,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 137. [2021-11-02 23:07:36,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.125) internal successors, (153), 136 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2021-11-02 23:07:36,886 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 59 [2021-11-02 23:07:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:36,886 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2021-11-02 23:07:36,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 23:07:36,887 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2021-11-02 23:07:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 23:07:36,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:36,890 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:36,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:37,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:07:37,103 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:37,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:37,104 INFO L85 PathProgramCache]: Analyzing trace with hash 908900863, now seen corresponding path program 14 times [2021-11-02 23:07:37,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:37,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722577713] [2021-11-02 23:07:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:37,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:37,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:37,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722577713] [2021-11-02 23:07:37,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722577713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:37,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673533854] [2021-11-02 23:07:37,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:07:37,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:37,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:37,292 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:37,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:07:37,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:07:37,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:37,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:07:37,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:37,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673533854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:37,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:37,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:07:37,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145019856] [2021-11-02 23:07:37,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:07:37,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:37,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:07:37,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:07:37,692 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 23:07:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:37,850 INFO L93 Difference]: Finished difference Result 266 states and 285 transitions. [2021-11-02 23:07:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:07:37,850 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 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 62 [2021-11-02 23:07:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:37,852 INFO L225 Difference]: With dead ends: 266 [2021-11-02 23:07:37,852 INFO L226 Difference]: Without dead ends: 181 [2021-11-02 23:07:37,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 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 23:07:37,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-02 23:07:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 145. [2021-11-02 23:07:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.125) internal successors, (162), 144 states have internal predecessors, (162), 0 states have call successors, (0), 0 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 23:07:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2021-11-02 23:07:37,867 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 62 [2021-11-02 23:07:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:37,868 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2021-11-02 23:07:37,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 23:07:37,869 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2021-11-02 23:07:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 23:07:37,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:37,870 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:37,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:38,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:38,083 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash -910761467, now seen corresponding path program 15 times [2021-11-02 23:07:38,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:38,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666355434] [2021-11-02 23:07:38,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:38,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:38,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:38,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666355434] [2021-11-02 23:07:38,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666355434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:38,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767097990] [2021-11-02 23:07:38,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:07:38,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:38,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:38,332 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:38,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:07:38,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-02 23:07:38,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:38,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:07:38,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:39,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767097990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:39,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:39,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:07:39,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033598319] [2021-11-02 23:07:39,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:07:39,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:39,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:07:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:07:39,018 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 23:07:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:39,186 INFO L93 Difference]: Finished difference Result 281 states and 301 transitions. [2021-11-02 23:07:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:07:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 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 65 [2021-11-02 23:07:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:39,189 INFO L225 Difference]: With dead ends: 281 [2021-11-02 23:07:39,189 INFO L226 Difference]: Without dead ends: 191 [2021-11-02 23:07:39,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:07:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-02 23:07:39,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 153. [2021-11-02 23:07:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.125) internal successors, (171), 152 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2021-11-02 23:07:39,202 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 65 [2021-11-02 23:07:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:39,202 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2021-11-02 23:07:39,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 23:07:39,203 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2021-11-02 23:07:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 23:07:39,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:39,204 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:39,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:39,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:39,415 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:39,416 INFO L85 PathProgramCache]: Analyzing trace with hash 605975615, now seen corresponding path program 16 times [2021-11-02 23:07:39,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:39,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91872732] [2021-11-02 23:07:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:39,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:39,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:39,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91872732] [2021-11-02 23:07:39,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91872732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:39,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783621851] [2021-11-02 23:07:39,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:07:39,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:39,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:39,645 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:39,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:07:39,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:07:39,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:39,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:07:39,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:40,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783621851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:40,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:40,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:07:40,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921850366] [2021-11-02 23:07:40,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:07:40,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:40,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:07:40,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:07:40,115 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 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 23:07:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:40,350 INFO L93 Difference]: Finished difference Result 296 states and 317 transitions. [2021-11-02 23:07:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:07:40,350 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 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) Word has length 68 [2021-11-02 23:07:40,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:40,352 INFO L225 Difference]: With dead ends: 296 [2021-11-02 23:07:40,352 INFO L226 Difference]: Without dead ends: 201 [2021-11-02 23:07:40,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:07:40,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-02 23:07:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 161. [2021-11-02 23:07:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.125) internal successors, (180), 160 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 23:07:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 180 transitions. [2021-11-02 23:07:40,361 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 180 transitions. Word has length 68 [2021-11-02 23:07:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:40,362 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 180 transitions. [2021-11-02 23:07:40,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 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 23:07:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 180 transitions. [2021-11-02 23:07:40,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 23:07:40,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:40,363 INFO L513 BasicCegarLoop]: trace histogram [20, 19, 19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:40,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:40,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:40,579 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1630535739, now seen corresponding path program 17 times [2021-11-02 23:07:40,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:40,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502071409] [2021-11-02 23:07:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:40,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:40,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:40,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502071409] [2021-11-02 23:07:40,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502071409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:40,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534846532] [2021-11-02 23:07:40,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:07:40,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:40,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:40,820 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:40,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:07:41,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-11-02 23:07:41,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:41,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:07:41,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:41,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534846532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:41,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:41,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:07:41,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763069160] [2021-11-02 23:07:41,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:07:41,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:41,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:07:41,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:07:41,494 INFO L87 Difference]: Start difference. First operand 161 states and 180 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:41,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:41,691 INFO L93 Difference]: Finished difference Result 311 states and 333 transitions. [2021-11-02 23:07:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:07:41,692 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-02 23:07:41,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:41,693 INFO L225 Difference]: With dead ends: 311 [2021-11-02 23:07:41,694 INFO L226 Difference]: Without dead ends: 211 [2021-11-02 23:07:41,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 71 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 23:07:41,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-02 23:07:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 169. [2021-11-02 23:07:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.125) internal successors, (189), 168 states have internal predecessors, (189), 0 states have call successors, (0), 0 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 23:07:41,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2021-11-02 23:07:41,704 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 71 [2021-11-02 23:07:41,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:41,704 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2021-11-02 23:07:41,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2021-11-02 23:07:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 23:07:41,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:41,706 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:41,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:41,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 23:07:41,931 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:41,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1712619905, now seen corresponding path program 18 times [2021-11-02 23:07:41,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:41,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150720772] [2021-11-02 23:07:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:41,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:42,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:42,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150720772] [2021-11-02 23:07:42,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150720772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:42,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639325793] [2021-11-02 23:07:42,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:07:42,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:42,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:42,185 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:42,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 23:07:43,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-02 23:07:43,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:43,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:07:43,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:43,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639325793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:43,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:43,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:07:43,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864771213] [2021-11-02 23:07:43,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:07:43,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:07:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:07:43,572 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 23:07:43,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:43,769 INFO L93 Difference]: Finished difference Result 326 states and 349 transitions. [2021-11-02 23:07:43,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:07:43,769 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 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 74 [2021-11-02 23:07:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:43,771 INFO L225 Difference]: With dead ends: 326 [2021-11-02 23:07:43,771 INFO L226 Difference]: Without dead ends: 221 [2021-11-02 23:07:43,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:07:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-02 23:07:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 177. [2021-11-02 23:07:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.125) internal successors, (198), 176 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 23:07:43,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2021-11-02 23:07:43,781 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 74 [2021-11-02 23:07:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:43,782 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2021-11-02 23:07:43,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 23:07:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2021-11-02 23:07:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 23:07:43,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:43,783 INFO L513 BasicCegarLoop]: trace histogram [22, 21, 21, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:43,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:43,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:43,999 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:44,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:44,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1049349509, now seen corresponding path program 19 times [2021-11-02 23:07:44,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:44,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180944282] [2021-11-02 23:07:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:44,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:44,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:44,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180944282] [2021-11-02 23:07:44,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180944282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:44,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631401432] [2021-11-02 23:07:44,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:07:44,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:44,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:44,266 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:44,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 23:07:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:44,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:07:44,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:44,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631401432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:44,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:44,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:07:44,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080158388] [2021-11-02 23:07:44,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:07:44,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:44,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:07:44,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:07:44,772 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 23:07:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:44,960 INFO L93 Difference]: Finished difference Result 341 states and 365 transitions. [2021-11-02 23:07:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:07:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 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 77 [2021-11-02 23:07:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:44,962 INFO L225 Difference]: With dead ends: 341 [2021-11-02 23:07:44,962 INFO L226 Difference]: Without dead ends: 231 [2021-11-02 23:07:44,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:07:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-02 23:07:44,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 185. [2021-11-02 23:07:44,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.125) internal successors, (207), 184 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 23:07:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 207 transitions. [2021-11-02 23:07:44,974 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 207 transitions. Word has length 77 [2021-11-02 23:07:44,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:44,975 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 207 transitions. [2021-11-02 23:07:44,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 23:07:44,975 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 207 transitions. [2021-11-02 23:07:44,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 23:07:44,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:44,976 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:45,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:45,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:45,191 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:45,192 INFO L85 PathProgramCache]: Analyzing trace with hash -103294785, now seen corresponding path program 20 times [2021-11-02 23:07:45,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:45,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759075886] [2021-11-02 23:07:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:45,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:45,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:45,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759075886] [2021-11-02 23:07:45,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759075886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:45,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592701587] [2021-11-02 23:07:45,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:07:45,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:45,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:45,523 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:45,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 23:07:45,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:07:45,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:45,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:07:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:46,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592701587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:46,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:46,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:07:46,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931984693] [2021-11-02 23:07:46,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:07:46,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:46,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:07:46,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:07:46,187 INFO L87 Difference]: Start difference. First operand 185 states and 207 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 23:07:46,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:46,419 INFO L93 Difference]: Finished difference Result 356 states and 381 transitions. [2021-11-02 23:07:46,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:07:46,420 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 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 23:07:46,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:46,422 INFO L225 Difference]: With dead ends: 356 [2021-11-02 23:07:46,422 INFO L226 Difference]: Without dead ends: 241 [2021-11-02 23:07:46,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 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 23:07:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-02 23:07:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 193. [2021-11-02 23:07:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.125) internal successors, (216), 192 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 23:07:46,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 216 transitions. [2021-11-02 23:07:46,431 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 216 transitions. Word has length 80 [2021-11-02 23:07:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:46,431 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 216 transitions. [2021-11-02 23:07:46,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 23:07:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 216 transitions. [2021-11-02 23:07:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 23:07:46,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:46,433 INFO L513 BasicCegarLoop]: trace histogram [24, 23, 23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:46,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:46,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 23:07:46,651 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:46,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:46,652 INFO L85 PathProgramCache]: Analyzing trace with hash -265925819, now seen corresponding path program 21 times [2021-11-02 23:07:46,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:46,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237398622] [2021-11-02 23:07:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:46,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:46,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:46,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237398622] [2021-11-02 23:07:46,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237398622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:46,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334125526] [2021-11-02 23:07:46,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:07:46,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:46,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:46,987 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:46,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 23:07:48,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-02 23:07:48,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:48,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:07:48,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:49,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334125526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:49,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:49,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:07:49,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547892189] [2021-11-02 23:07:49,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:07:49,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:49,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:07:49,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:07:49,248 INFO L87 Difference]: Start difference. First operand 193 states and 216 transitions. Second operand has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 27 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:49,464 INFO L93 Difference]: Finished difference Result 371 states and 397 transitions. [2021-11-02 23:07:49,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:07:49,465 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 27 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-02 23:07:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:49,469 INFO L225 Difference]: With dead ends: 371 [2021-11-02 23:07:49,469 INFO L226 Difference]: Without dead ends: 251 [2021-11-02 23:07:49,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:07:49,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-02 23:07:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 201. [2021-11-02 23:07:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.125) internal successors, (225), 200 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 23:07:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 225 transitions. [2021-11-02 23:07:49,479 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 225 transitions. Word has length 83 [2021-11-02 23:07:49,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:49,479 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 225 transitions. [2021-11-02 23:07:49,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 27 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 225 transitions. [2021-11-02 23:07:49,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 23:07:49,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:49,481 INFO L513 BasicCegarLoop]: trace histogram [25, 24, 24, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:49,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-02 23:07:49,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 23:07:49,703 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:49,704 INFO L85 PathProgramCache]: Analyzing trace with hash -483949825, now seen corresponding path program 22 times [2021-11-02 23:07:49,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:49,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670335793] [2021-11-02 23:07:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:49,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:50,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:50,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670335793] [2021-11-02 23:07:50,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670335793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:50,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487356155] [2021-11-02 23:07:50,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:07:50,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:50,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:50,057 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:50,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 23:07:50,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:07:50,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:50,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 23:07:50,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:50,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487356155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:50,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:50,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:07:50,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448442401] [2021-11-02 23:07:50,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:07:50,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:50,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:07:50,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:07:50,718 INFO L87 Difference]: Start difference. First operand 201 states and 225 transitions. Second operand has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 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 23:07:50,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:50,964 INFO L93 Difference]: Finished difference Result 386 states and 413 transitions. [2021-11-02 23:07:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:07:50,965 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 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) Word has length 86 [2021-11-02 23:07:50,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:50,967 INFO L225 Difference]: With dead ends: 386 [2021-11-02 23:07:50,967 INFO L226 Difference]: Without dead ends: 261 [2021-11-02 23:07:50,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:07:50,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-02 23:07:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 209. [2021-11-02 23:07:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.125) internal successors, (234), 208 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 23:07:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 234 transitions. [2021-11-02 23:07:50,976 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 234 transitions. Word has length 86 [2021-11-02 23:07:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:50,977 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 234 transitions. [2021-11-02 23:07:50,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 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 23:07:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 234 transitions. [2021-11-02 23:07:50,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 23:07:50,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:50,978 INFO L513 BasicCegarLoop]: trace histogram [26, 25, 25, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:51,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:51,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 23:07:51,191 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:51,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1646561019, now seen corresponding path program 23 times [2021-11-02 23:07:51,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:51,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639388885] [2021-11-02 23:07:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:51,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:51,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:51,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639388885] [2021-11-02 23:07:51,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639388885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:51,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072963938] [2021-11-02 23:07:51,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:07:51,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:51,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:51,620 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:51,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 23:07:52,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-11-02 23:07:52,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:52,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:07:52,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:52,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072963938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:52,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:52,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:07:52,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143374928] [2021-11-02 23:07:52,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:07:52,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:52,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:07:52,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:07:52,743 INFO L87 Difference]: Start difference. First operand 209 states and 234 transitions. Second operand has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:52,988 INFO L93 Difference]: Finished difference Result 401 states and 429 transitions. [2021-11-02 23:07:52,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:07:52,989 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-02 23:07:52,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:52,991 INFO L225 Difference]: With dead ends: 401 [2021-11-02 23:07:52,991 INFO L226 Difference]: Without dead ends: 271 [2021-11-02 23:07:52,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:07:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-02 23:07:52,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 217. [2021-11-02 23:07:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.125) internal successors, (243), 216 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2021-11-02 23:07:53,000 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 89 [2021-11-02 23:07:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:53,000 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2021-11-02 23:07:53,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:53,001 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2021-11-02 23:07:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 23:07:53,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:53,001 INFO L513 BasicCegarLoop]: trace histogram [27, 26, 26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:53,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:53,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 23:07:53,223 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:53,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:53,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1914600767, now seen corresponding path program 24 times [2021-11-02 23:07:53,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:53,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823866311] [2021-11-02 23:07:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:53,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:07:53,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:53,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823866311] [2021-11-02 23:07:53,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823866311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:53,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294462254] [2021-11-02 23:07:53,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:07:53,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:53,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:53,598 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:53,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 23:08:00,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-11-02 23:08:00,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:00,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 23:08:00,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:00,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294462254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:00,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:00,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:08:00,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314033015] [2021-11-02 23:08:00,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:08:00,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:00,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:08:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:08:00,731 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 23:08:00,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:00,962 INFO L93 Difference]: Finished difference Result 416 states and 445 transitions. [2021-11-02 23:08:00,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:08:00,963 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 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 23:08:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:00,965 INFO L225 Difference]: With dead ends: 416 [2021-11-02 23:08:00,965 INFO L226 Difference]: Without dead ends: 281 [2021-11-02 23:08:00,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:08:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-02 23:08:00,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 225. [2021-11-02 23:08:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.125) internal successors, (252), 224 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 23:08:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 252 transitions. [2021-11-02 23:08:00,974 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 252 transitions. Word has length 92 [2021-11-02 23:08:00,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:00,975 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 252 transitions. [2021-11-02 23:08:00,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 23:08:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 252 transitions. [2021-11-02 23:08:00,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 23:08:00,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:00,976 INFO L513 BasicCegarLoop]: trace histogram [28, 27, 27, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:01,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:01,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:08:01,199 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1796778299, now seen corresponding path program 25 times [2021-11-02 23:08:01,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:01,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181828656] [2021-11-02 23:08:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:01,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:01,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:01,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181828656] [2021-11-02 23:08:01,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181828656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:01,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638161249] [2021-11-02 23:08:01,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:08:01,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:01,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:01,627 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:01,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 23:08:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:02,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:08:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:02,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638161249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:02,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:02,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:08:02,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808598701] [2021-11-02 23:08:02,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:08:02,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:02,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:08:02,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:08:02,407 INFO L87 Difference]: Start difference. First operand 225 states and 252 transitions. Second operand has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:02,665 INFO L93 Difference]: Finished difference Result 431 states and 461 transitions. [2021-11-02 23:08:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:08:02,666 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-02 23:08:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:02,668 INFO L225 Difference]: With dead ends: 431 [2021-11-02 23:08:02,668 INFO L226 Difference]: Without dead ends: 291 [2021-11-02 23:08:02,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:08:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-02 23:08:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 233. [2021-11-02 23:08:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.125) internal successors, (261), 232 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 23:08:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 261 transitions. [2021-11-02 23:08:02,678 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 261 transitions. Word has length 95 [2021-11-02 23:08:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:02,678 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 261 transitions. [2021-11-02 23:08:02,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 261 transitions. [2021-11-02 23:08:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-02 23:08:02,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:02,680 INFO L513 BasicCegarLoop]: trace histogram [29, 28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:02,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:02,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:02,895 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2147432577, now seen corresponding path program 26 times [2021-11-02 23:08:02,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:02,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105355155] [2021-11-02 23:08:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:02,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:03,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:03,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105355155] [2021-11-02 23:08:03,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105355155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:03,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280327077] [2021-11-02 23:08:03,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:08:03,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:03,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:03,365 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:03,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 23:08:03,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:08:03,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:08:03,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:04,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280327077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:04,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:04,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-02 23:08:04,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993003223] [2021-11-02 23:08:04,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:08:04,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:04,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:08:04,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:08:04,284 INFO L87 Difference]: Start difference. First operand 233 states and 261 transitions. Second operand has 32 states, 32 states have (on average 3.125) internal successors, (100), 32 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 23:08:04,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:04,517 INFO L93 Difference]: Finished difference Result 446 states and 477 transitions. [2021-11-02 23:08:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:08:04,518 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 32 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) Word has length 98 [2021-11-02 23:08:04,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:04,519 INFO L225 Difference]: With dead ends: 446 [2021-11-02 23:08:04,519 INFO L226 Difference]: Without dead ends: 301 [2021-11-02 23:08:04,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:08:04,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-02 23:08:04,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 241. [2021-11-02 23:08:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.125) internal successors, (270), 240 states have internal predecessors, (270), 0 states have call successors, (0), 0 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 23:08:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 270 transitions. [2021-11-02 23:08:04,528 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 270 transitions. Word has length 98 [2021-11-02 23:08:04,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:04,529 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 270 transitions. [2021-11-02 23:08:04,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 32 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 23:08:04,529 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 270 transitions. [2021-11-02 23:08:04,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-02 23:08:04,530 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:04,530 INFO L513 BasicCegarLoop]: trace histogram [30, 29, 29, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:04,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:04,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-02 23:08:04,751 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:04,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1166402693, now seen corresponding path program 27 times [2021-11-02 23:08:04,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:04,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141439376] [2021-11-02 23:08:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:04,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:05,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:05,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141439376] [2021-11-02 23:08:05,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141439376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:05,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152101644] [2021-11-02 23:08:05,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:08:05,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:05,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:05,220 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:05,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 23:08:15,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-02 23:08:15,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:15,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:08:15,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:16,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152101644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:16,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:16,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-02 23:08:16,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433022024] [2021-11-02 23:08:16,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 23:08:16,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:16,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 23:08:16,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:08:16,309 INFO L87 Difference]: Start difference. First operand 241 states and 270 transitions. Second operand has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 23:08:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:16,602 INFO L93 Difference]: Finished difference Result 461 states and 493 transitions. [2021-11-02 23:08:16,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:08:16,602 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2021-11-02 23:08:16,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:16,604 INFO L225 Difference]: With dead ends: 461 [2021-11-02 23:08:16,604 INFO L226 Difference]: Without dead ends: 311 [2021-11-02 23:08:16,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:08:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-02 23:08:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 249. [2021-11-02 23:08:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.125) internal successors, (279), 248 states have internal predecessors, (279), 0 states have call successors, (0), 0 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 23:08:16,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2021-11-02 23:08:16,612 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 101 [2021-11-02 23:08:16,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:16,612 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2021-11-02 23:08:16,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 23:08:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2021-11-02 23:08:16,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-02 23:08:16,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:16,613 INFO L513 BasicCegarLoop]: trace histogram [31, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:16,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-02 23:08:16,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:16,814 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:16,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:16,814 INFO L85 PathProgramCache]: Analyzing trace with hash -485334593, now seen corresponding path program 28 times [2021-11-02 23:08:16,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:16,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299873825] [2021-11-02 23:08:16,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:16,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:17,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:17,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299873825] [2021-11-02 23:08:17,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299873825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:17,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438433013] [2021-11-02 23:08:17,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:08:17,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:17,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:17,316 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:17,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 23:08:17,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:08:17,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:17,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 23:08:17,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:18,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438433013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:18,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:18,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-02 23:08:18,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960901042] [2021-11-02 23:08:18,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 23:08:18,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:18,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 23:08:18,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:08:18,206 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:18,518 INFO L93 Difference]: Finished difference Result 476 states and 509 transitions. [2021-11-02 23:08:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:08:18,519 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-02 23:08:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:18,521 INFO L225 Difference]: With dead ends: 476 [2021-11-02 23:08:18,521 INFO L226 Difference]: Without dead ends: 321 [2021-11-02 23:08:18,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:08:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-02 23:08:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 257. [2021-11-02 23:08:18,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.125) internal successors, (288), 256 states have internal predecessors, (288), 0 states have call successors, (0), 0 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 23:08:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2021-11-02 23:08:18,534 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 104 [2021-11-02 23:08:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:18,535 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2021-11-02 23:08:18,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2021-11-02 23:08:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-02 23:08:18,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:18,536 INFO L513 BasicCegarLoop]: trace histogram [32, 31, 31, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:18,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:18,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:18,749 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:18,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:18,750 INFO L85 PathProgramCache]: Analyzing trace with hash 49488453, now seen corresponding path program 29 times [2021-11-02 23:08:18,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:18,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774993124] [2021-11-02 23:08:18,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:18,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:19,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:19,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774993124] [2021-11-02 23:08:19,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774993124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:19,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965601188] [2021-11-02 23:08:19,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:08:19,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:19,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:19,296 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:19,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 23:08:21,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-11-02 23:08:21,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:21,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:08:21,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:22,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965601188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:22,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:22,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-02 23:08:22,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590127645] [2021-11-02 23:08:22,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 23:08:22,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:22,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 23:08:22,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:08:22,172 INFO L87 Difference]: Start difference. First operand 257 states and 288 transitions. Second operand has 35 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 35 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 23:08:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:22,442 INFO L93 Difference]: Finished difference Result 491 states and 525 transitions. [2021-11-02 23:08:22,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:08:22,442 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 35 states have internal predecessors, (109), 0 states have call successors, (0), 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 107 [2021-11-02 23:08:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:22,444 INFO L225 Difference]: With dead ends: 491 [2021-11-02 23:08:22,444 INFO L226 Difference]: Without dead ends: 331 [2021-11-02 23:08:22,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 107 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 23:08:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-02 23:08:22,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 265. [2021-11-02 23:08:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.125) internal successors, (297), 264 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 23:08:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2021-11-02 23:08:22,454 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 107 [2021-11-02 23:08:22,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:22,455 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2021-11-02 23:08:22,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 35 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 23:08:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2021-11-02 23:08:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-02 23:08:22,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:22,456 INFO L513 BasicCegarLoop]: trace histogram [33, 32, 32, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:22,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:22,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 23:08:22,671 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:22,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:22,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1365816321, now seen corresponding path program 30 times [2021-11-02 23:08:22,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:22,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959538890] [2021-11-02 23:08:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:22,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:23,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:23,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959538890] [2021-11-02 23:08:23,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959538890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:23,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508465055] [2021-11-02 23:08:23,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:08:23,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:23,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:23,160 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:23,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 23:08:40,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2021-11-02 23:08:40,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:40,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-02 23:08:40,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:41,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508465055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:41,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:41,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-02 23:08:41,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995103619] [2021-11-02 23:08:41,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 23:08:41,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 23:08:41,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:08:41,328 INFO L87 Difference]: Start difference. First operand 265 states and 297 transitions. Second operand has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 36 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 23:08:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:41,617 INFO L93 Difference]: Finished difference Result 506 states and 541 transitions. [2021-11-02 23:08:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:08:41,617 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 36 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) Word has length 110 [2021-11-02 23:08:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:41,619 INFO L225 Difference]: With dead ends: 506 [2021-11-02 23:08:41,619 INFO L226 Difference]: Without dead ends: 341 [2021-11-02 23:08:41,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:08:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-02 23:08:41,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 273. [2021-11-02 23:08:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.125) internal successors, (306), 272 states have internal predecessors, (306), 0 states have call successors, (0), 0 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 23:08:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 306 transitions. [2021-11-02 23:08:41,629 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 306 transitions. Word has length 110 [2021-11-02 23:08:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:41,630 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 306 transitions. [2021-11-02 23:08:41,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 36 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 23:08:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 306 transitions. [2021-11-02 23:08:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-02 23:08:41,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:41,631 INFO L513 BasicCegarLoop]: trace histogram [34, 33, 33, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:41,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:41,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-02 23:08:41,856 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1016393723, now seen corresponding path program 31 times [2021-11-02 23:08:41,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:41,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250861908] [2021-11-02 23:08:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:41,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:42,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:42,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250861908] [2021-11-02 23:08:42,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250861908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:42,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670982889] [2021-11-02 23:08:42,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:08:42,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:42,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:42,368 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:42,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 23:08:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:42,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:08:42,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:43,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670982889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:43,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:43,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-02 23:08:43,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073031529] [2021-11-02 23:08:43,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 23:08:43,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:43,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 23:08:43,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:08:43,265 INFO L87 Difference]: Start difference. First operand 273 states and 306 transitions. Second operand has 37 states, 37 states have (on average 3.108108108108108) internal successors, (115), 37 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 23:08:43,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:43,566 INFO L93 Difference]: Finished difference Result 521 states and 557 transitions. [2021-11-02 23:08:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:08:43,567 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.108108108108108) internal successors, (115), 37 states have internal predecessors, (115), 0 states have call successors, (0), 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 113 [2021-11-02 23:08:43,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:43,568 INFO L225 Difference]: With dead ends: 521 [2021-11-02 23:08:43,569 INFO L226 Difference]: Without dead ends: 351 [2021-11-02 23:08:43,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:08:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-02 23:08:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 281. [2021-11-02 23:08:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.125) internal successors, (315), 280 states have internal predecessors, (315), 0 states have call successors, (0), 0 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 23:08:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 315 transitions. [2021-11-02 23:08:43,576 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 315 transitions. Word has length 113 [2021-11-02 23:08:43,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:43,576 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 315 transitions. [2021-11-02 23:08:43,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.108108108108108) internal successors, (115), 37 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 23:08:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 315 transitions. [2021-11-02 23:08:43,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-02 23:08:43,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:43,578 INFO L513 BasicCegarLoop]: trace histogram [35, 34, 34, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:43,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:43,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:43,793 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1926465087, now seen corresponding path program 32 times [2021-11-02 23:08:43,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:43,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111768724] [2021-11-02 23:08:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:43,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1754 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:44,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:44,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111768724] [2021-11-02 23:08:44,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111768724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:44,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314128946] [2021-11-02 23:08:44,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:08:44,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:44,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:44,421 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:44,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 23:08:45,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:08:45,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:08:45,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1754 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:45,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314128946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:45,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:45,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-02 23:08:45,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803418967] [2021-11-02 23:08:45,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 23:08:45,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:45,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 23:08:45,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:08:45,364 INFO L87 Difference]: Start difference. First operand 281 states and 315 transitions. Second operand has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 38 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 23:08:45,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:45,649 INFO L93 Difference]: Finished difference Result 536 states and 573 transitions. [2021-11-02 23:08:45,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 23:08:45,649 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 38 states have internal predecessors, (118), 0 states have call successors, (0), 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 116 [2021-11-02 23:08:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:45,651 INFO L225 Difference]: With dead ends: 536 [2021-11-02 23:08:45,651 INFO L226 Difference]: Without dead ends: 361 [2021-11-02 23:08:45,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:08:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-02 23:08:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 289. [2021-11-02 23:08:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.125) internal successors, (324), 288 states have internal predecessors, (324), 0 states have call successors, (0), 0 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 23:08:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 324 transitions. [2021-11-02 23:08:45,661 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 324 transitions. Word has length 116 [2021-11-02 23:08:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:45,661 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 324 transitions. [2021-11-02 23:08:45,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 38 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 23:08:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 324 transitions. [2021-11-02 23:08:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-02 23:08:45,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:45,663 INFO L513 BasicCegarLoop]: trace histogram [36, 35, 35, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:45,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-02 23:08:45,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:45,879 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:45,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:45,880 INFO L85 PathProgramCache]: Analyzing trace with hash -534139451, now seen corresponding path program 33 times [2021-11-02 23:08:45,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:45,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668416843] [2021-11-02 23:08:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:45,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1858 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:46,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:46,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668416843] [2021-11-02 23:08:46,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668416843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:46,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924691565] [2021-11-02 23:08:46,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:08:46,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:46,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:46,452 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:46,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 23:09:02,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-11-02 23:09:02,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:02,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:09:02,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1858 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:09:03,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924691565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:03,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:03,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-02 23:09:03,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093809321] [2021-11-02 23:09:03,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 23:09:03,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:03,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 23:09:03,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:09:03,126 INFO L87 Difference]: Start difference. First operand 289 states and 324 transitions. Second operand has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:03,558 INFO L93 Difference]: Finished difference Result 551 states and 589 transitions. [2021-11-02 23:09:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:09:03,558 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-02 23:09:03,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:03,561 INFO L225 Difference]: With dead ends: 551 [2021-11-02 23:09:03,561 INFO L226 Difference]: Without dead ends: 371 [2021-11-02 23:09:03,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:09:03,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-02 23:09:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 297. [2021-11-02 23:09:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.125) internal successors, (333), 296 states have internal predecessors, (333), 0 states have call successors, (0), 0 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 23:09:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 333 transitions. [2021-11-02 23:09:03,573 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 333 transitions. Word has length 119 [2021-11-02 23:09:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:03,574 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 333 transitions. [2021-11-02 23:09:03,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 333 transitions. [2021-11-02 23:09:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-02 23:09:03,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:03,575 INFO L513 BasicCegarLoop]: trace histogram [37, 36, 36, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:03,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:03,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 23:09:03,803 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:03,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:03,804 INFO L85 PathProgramCache]: Analyzing trace with hash 2097877119, now seen corresponding path program 34 times [2021-11-02 23:09:03,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:03,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341051386] [2021-11-02 23:09:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:03,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:09:04,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:04,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341051386] [2021-11-02 23:09:04,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341051386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:04,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57641514] [2021-11-02 23:09:04,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:09:04,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:04,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:04,434 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:04,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 23:09:05,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:09:05,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:05,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 23:09:05,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:09:05,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57641514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:05,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:05,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-02 23:09:05,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483198377] [2021-11-02 23:09:05,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-02 23:09:05,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:05,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-02 23:09:05,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:09:05,526 INFO L87 Difference]: Start difference. First operand 297 states and 333 transitions. Second operand has 40 states, 40 states have (on average 3.1) internal successors, (124), 40 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 23:09:05,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:05,868 INFO L93 Difference]: Finished difference Result 566 states and 605 transitions. [2021-11-02 23:09:05,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:09:05,868 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.1) internal successors, (124), 40 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 122 [2021-11-02 23:09:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:05,870 INFO L225 Difference]: With dead ends: 566 [2021-11-02 23:09:05,870 INFO L226 Difference]: Without dead ends: 381 [2021-11-02 23:09:05,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:09:05,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-02 23:09:05,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 305. [2021-11-02 23:09:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.125) internal successors, (342), 304 states have internal predecessors, (342), 0 states have call successors, (0), 0 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 23:09:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 342 transitions. [2021-11-02 23:09:05,879 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 342 transitions. Word has length 122 [2021-11-02 23:09:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:05,880 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 342 transitions. [2021-11-02 23:09:05,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.1) internal successors, (124), 40 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 23:09:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 342 transitions. [2021-11-02 23:09:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-02 23:09:05,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:05,881 INFO L513 BasicCegarLoop]: trace histogram [38, 37, 37, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:05,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-02 23:09:06,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 23:09:06,103 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:06,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:06,104 INFO L85 PathProgramCache]: Analyzing trace with hash -714409083, now seen corresponding path program 35 times [2021-11-02 23:09:06,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:06,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530506387] [2021-11-02 23:09:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:06,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2075 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:09:06,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:06,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530506387] [2021-11-02 23:09:06,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530506387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:06,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190977738] [2021-11-02 23:09:06,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:09:06,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:06,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:06,736 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:06,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 23:09:16,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2021-11-02 23:09:16,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:16,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:09:16,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2075 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:09:16,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190977738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:16,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:16,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-11-02 23:09:16,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787025135] [2021-11-02 23:09:16,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 23:09:16,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:16,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 23:09:16,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:09:16,529 INFO L87 Difference]: Start difference. First operand 305 states and 342 transitions. Second operand has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:16,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:16,878 INFO L93 Difference]: Finished difference Result 581 states and 621 transitions. [2021-11-02 23:09:16,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:09:16,878 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-02 23:09:16,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:16,880 INFO L225 Difference]: With dead ends: 581 [2021-11-02 23:09:16,880 INFO L226 Difference]: Without dead ends: 391 [2021-11-02 23:09:16,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:09:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-02 23:09:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 313. [2021-11-02 23:09:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.125) internal successors, (351), 312 states have internal predecessors, (351), 0 states have call successors, (0), 0 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 23:09:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 351 transitions. [2021-11-02 23:09:16,889 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 351 transitions. Word has length 125 [2021-11-02 23:09:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:16,889 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 351 transitions. [2021-11-02 23:09:16,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 351 transitions. [2021-11-02 23:09:16,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-02 23:09:16,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:16,890 INFO L513 BasicCegarLoop]: trace histogram [39, 38, 38, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:16,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-02 23:09:17,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 23:09:17,115 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 394390207, now seen corresponding path program 36 times [2021-11-02 23:09:17,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:17,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665957525] [2021-11-02 23:09:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:17,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2188 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:09:17,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:17,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665957525] [2021-11-02 23:09:17,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665957525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:17,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635228453] [2021-11-02 23:09:17,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:09:17,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:17,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:17,775 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:17,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 23:10:09,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-11-02 23:10:09,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:09,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 23:10:09,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2188 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:10:09,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635228453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:09,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:09,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-02 23:10:09,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255945977] [2021-11-02 23:10:09,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 23:10:09,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:09,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 23:10:09,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:10:09,806 INFO L87 Difference]: Start difference. First operand 313 states and 351 transitions. Second operand has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 23:10:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:10,150 INFO L93 Difference]: Finished difference Result 596 states and 637 transitions. [2021-11-02 23:10:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 23:10:10,151 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 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 128 [2021-11-02 23:10:10,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:10,153 INFO L225 Difference]: With dead ends: 596 [2021-11-02 23:10:10,153 INFO L226 Difference]: Without dead ends: 401 [2021-11-02 23:10:10,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:10:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-02 23:10:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 321. [2021-11-02 23:10:10,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.125) internal successors, (360), 320 states have internal predecessors, (360), 0 states have call successors, (0), 0 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 23:10:10,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 360 transitions. [2021-11-02 23:10:10,163 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 360 transitions. Word has length 128 [2021-11-02 23:10:10,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:10,163 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 360 transitions. [2021-11-02 23:10:10,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 23:10:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 360 transitions. [2021-11-02 23:10:10,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-02 23:10:10,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:10,165 INFO L513 BasicCegarLoop]: trace histogram [40, 39, 39, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:10,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:10,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:10,379 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:10,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:10,380 INFO L85 PathProgramCache]: Analyzing trace with hash 40565061, now seen corresponding path program 37 times [2021-11-02 23:10:10,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:10,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806898382] [2021-11-02 23:10:10,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:10,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:10:11,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:11,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806898382] [2021-11-02 23:10:11,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806898382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:11,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285775165] [2021-11-02 23:10:11,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:11,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:11,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:11,072 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:11,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 23:10:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:11,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:10:11,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:10:12,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285775165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:12,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:12,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-02 23:10:12,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100857549] [2021-11-02 23:10:12,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-02 23:10:12,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:12,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-02 23:10:12,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:10:12,231 INFO L87 Difference]: Start difference. First operand 321 states and 360 transitions. Second operand has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 23:10:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:12,583 INFO L93 Difference]: Finished difference Result 611 states and 653 transitions. [2021-11-02 23:10:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:10:12,584 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 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 131 [2021-11-02 23:10:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:12,586 INFO L225 Difference]: With dead ends: 611 [2021-11-02 23:10:12,586 INFO L226 Difference]: Without dead ends: 411 [2021-11-02 23:10:12,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:10:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-02 23:10:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 329. [2021-11-02 23:10:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.125) internal successors, (369), 328 states have internal predecessors, (369), 0 states have call successors, (0), 0 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 23:10:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 369 transitions. [2021-11-02 23:10:12,597 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 369 transitions. Word has length 131 [2021-11-02 23:10:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:12,597 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 369 transitions. [2021-11-02 23:10:12,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 23:10:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 369 transitions. [2021-11-02 23:10:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-02 23:10:12,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:12,599 INFO L513 BasicCegarLoop]: trace histogram [41, 40, 40, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:12,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:12,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:12,823 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:12,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash -914615041, now seen corresponding path program 38 times [2021-11-02 23:10:12,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:12,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132474358] [2021-11-02 23:10:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:12,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2423 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:10:13,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:13,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132474358] [2021-11-02 23:10:13,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132474358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:13,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79979836] [2021-11-02 23:10:13,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:13,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:13,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:13,536 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:13,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 23:10:14,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:10:14,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:14,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 23:10:14,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2423 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:10:14,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79979836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:14,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:14,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-11-02 23:10:14,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296990811] [2021-11-02 23:10:14,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-02 23:10:14,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-02 23:10:14,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:10:14,726 INFO L87 Difference]: Start difference. First operand 329 states and 369 transitions. Second operand has 44 states, 44 states have (on average 3.090909090909091) internal successors, (136), 44 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 23:10:15,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:15,098 INFO L93 Difference]: Finished difference Result 626 states and 669 transitions. [2021-11-02 23:10:15,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-02 23:10:15,098 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.090909090909091) internal successors, (136), 44 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) Word has length 134 [2021-11-02 23:10:15,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:15,100 INFO L225 Difference]: With dead ends: 626 [2021-11-02 23:10:15,100 INFO L226 Difference]: Without dead ends: 421 [2021-11-02 23:10:15,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:10:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-02 23:10:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 337. [2021-11-02 23:10:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.125) internal successors, (378), 336 states have internal predecessors, (378), 0 states have call successors, (0), 0 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 23:10:15,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 378 transitions. [2021-11-02 23:10:15,111 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 378 transitions. Word has length 134 [2021-11-02 23:10:15,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:15,112 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 378 transitions. [2021-11-02 23:10:15,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.090909090909091) internal successors, (136), 44 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 23:10:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 378 transitions. [2021-11-02 23:10:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-02 23:10:15,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:15,113 INFO L513 BasicCegarLoop]: trace histogram [42, 41, 41, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:15,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:15,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:15,327 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:15,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:15,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1768269573, now seen corresponding path program 39 times [2021-11-02 23:10:15,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:15,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282929656] [2021-11-02 23:10:15,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:15,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2545 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:10:16,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:16,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282929656] [2021-11-02 23:10:16,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282929656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:16,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279946875] [2021-11-02 23:10:16,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:10:16,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:16,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:16,099 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:16,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 23:10:43,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-11-02 23:10:43,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:43,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:10:43,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2545 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:10:44,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279946875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:44,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:44,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-02 23:10:44,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478327774] [2021-11-02 23:10:44,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-02 23:10:44,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:44,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-02 23:10:44,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:10:44,202 INFO L87 Difference]: Start difference. First operand 337 states and 378 transitions. Second operand has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:44,613 INFO L93 Difference]: Finished difference Result 641 states and 685 transitions. [2021-11-02 23:10:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:10:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-02 23:10:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:44,617 INFO L225 Difference]: With dead ends: 641 [2021-11-02 23:10:44,618 INFO L226 Difference]: Without dead ends: 431 [2021-11-02 23:10:44,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:10:44,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-02 23:10:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 345. [2021-11-02 23:10:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.125) internal successors, (387), 344 states have internal predecessors, (387), 0 states have call successors, (0), 0 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 23:10:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 387 transitions. [2021-11-02 23:10:44,632 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 387 transitions. Word has length 137 [2021-11-02 23:10:44,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:44,633 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 387 transitions. [2021-11-02 23:10:44,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:44,633 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 387 transitions. [2021-11-02 23:10:44,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-02 23:10:44,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:44,635 INFO L513 BasicCegarLoop]: trace histogram [43, 42, 42, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:44,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:44,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-02 23:10:44,851 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1757573313, now seen corresponding path program 40 times [2021-11-02 23:10:44,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:44,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767159172] [2021-11-02 23:10:44,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:44,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:10:45,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:45,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767159172] [2021-11-02 23:10:45,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767159172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:45,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221932851] [2021-11-02 23:10:45,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:10:45,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:45,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:45,656 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:45,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 23:10:46,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:10:46,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:46,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 23:10:46,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:10:47,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221932851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:47,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:47,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-02 23:10:47,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212544229] [2021-11-02 23:10:47,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 23:10:47,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 23:10:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:10:47,069 INFO L87 Difference]: Start difference. First operand 345 states and 387 transitions. Second operand has 46 states, 46 states have (on average 3.0869565217391304) internal successors, (142), 46 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:47,553 INFO L93 Difference]: Finished difference Result 656 states and 701 transitions. [2021-11-02 23:10:47,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 23:10:47,554 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0869565217391304) internal successors, (142), 46 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-02 23:10:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:47,555 INFO L225 Difference]: With dead ends: 656 [2021-11-02 23:10:47,556 INFO L226 Difference]: Without dead ends: 441 [2021-11-02 23:10:47,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:10:47,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-11-02 23:10:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 353. [2021-11-02 23:10:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.125) internal successors, (396), 352 states have internal predecessors, (396), 0 states have call successors, (0), 0 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 23:10:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 396 transitions. [2021-11-02 23:10:47,566 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 396 transitions. Word has length 140 [2021-11-02 23:10:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:47,566 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 396 transitions. [2021-11-02 23:10:47,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0869565217391304) internal successors, (142), 46 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:47,567 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 396 transitions. [2021-11-02 23:10:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-02 23:10:47,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:47,568 INFO L513 BasicCegarLoop]: trace histogram [44, 43, 43, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:47,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-02 23:10:47,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:47,795 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:47,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:47,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1872168133, now seen corresponding path program 41 times [2021-11-02 23:10:47,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:47,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851519308] [2021-11-02 23:10:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:47,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2798 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:10:48,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:48,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851519308] [2021-11-02 23:10:48,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851519308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:48,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546847409] [2021-11-02 23:10:48,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:10:48,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:48,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:48,707 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:48,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 23:11:08,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2021-11-02 23:11:08,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:08,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:11:08,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2798 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:11:09,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546847409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:09,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:09,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-11-02 23:11:09,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011639444] [2021-11-02 23:11:09,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-02 23:11:09,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:09,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-02 23:11:09,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:11:09,239 INFO L87 Difference]: Start difference. First operand 353 states and 396 transitions. Second operand has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:09,703 INFO L93 Difference]: Finished difference Result 671 states and 717 transitions. [2021-11-02 23:11:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 23:11:09,704 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-02 23:11:09,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:09,705 INFO L225 Difference]: With dead ends: 671 [2021-11-02 23:11:09,705 INFO L226 Difference]: Without dead ends: 451 [2021-11-02 23:11:09,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:11:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-02 23:11:09,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 361. [2021-11-02 23:11:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.125) internal successors, (405), 360 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 23:11:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 405 transitions. [2021-11-02 23:11:09,712 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 405 transitions. Word has length 143 [2021-11-02 23:11:09,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:09,713 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 405 transitions. [2021-11-02 23:11:09,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 405 transitions. [2021-11-02 23:11:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-02 23:11:09,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:09,716 INFO L513 BasicCegarLoop]: trace histogram [45, 44, 44, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:09,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:09,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:09,927 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:09,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1107974527, now seen corresponding path program 42 times [2021-11-02 23:11:09,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:09,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918229233] [2021-11-02 23:11:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:09,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:11:10,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:10,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918229233] [2021-11-02 23:11:10,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918229233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:10,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844681805] [2021-11-02 23:11:10,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:11:10,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:10,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:10,770 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:10,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 23:13:16,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2021-11-02 23:13:16,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:16,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 23:13:16,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:13:16,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844681805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:16,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:16,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-02 23:13:16,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653376922] [2021-11-02 23:13:16,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-02 23:13:16,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:16,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-02 23:13:16,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:13:16,691 INFO L87 Difference]: Start difference. First operand 361 states and 405 transitions. Second operand has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 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 23:13:17,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:17,136 INFO L93 Difference]: Finished difference Result 686 states and 733 transitions. [2021-11-02 23:13:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 23:13:17,137 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-02 23:13:17,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:17,139 INFO L225 Difference]: With dead ends: 686 [2021-11-02 23:13:17,139 INFO L226 Difference]: Without dead ends: 461 [2021-11-02 23:13:17,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:13:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-02 23:13:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 369. [2021-11-02 23:13:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.125) internal successors, (414), 368 states have internal predecessors, (414), 0 states have call successors, (0), 0 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 23:13:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 414 transitions. [2021-11-02 23:13:17,148 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 414 transitions. Word has length 146 [2021-11-02 23:13:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:17,149 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 414 transitions. [2021-11-02 23:13:17,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 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 23:13:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 414 transitions. [2021-11-02 23:13:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-02 23:13:17,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:17,150 INFO L513 BasicCegarLoop]: trace histogram [46, 45, 45, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:17,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-02 23:13:17,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 23:13:17,363 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:17,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:17,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1657073019, now seen corresponding path program 43 times [2021-11-02 23:13:17,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:17,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997768650] [2021-11-02 23:13:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:17,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:13:18,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:18,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997768650] [2021-11-02 23:13:18,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997768650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:18,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739952094] [2021-11-02 23:13:18,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:13:18,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:18,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:18,358 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:18,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 23:13:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:13:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:13:19,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739952094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:19,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:19,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-02 23:13:19,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745401594] [2021-11-02 23:13:19,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 23:13:19,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:19,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 23:13:19,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:13:19,835 INFO L87 Difference]: Start difference. First operand 369 states and 414 transitions. Second operand has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:20,325 INFO L93 Difference]: Finished difference Result 701 states and 749 transitions. [2021-11-02 23:13:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 23:13:20,325 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-02 23:13:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:20,327 INFO L225 Difference]: With dead ends: 701 [2021-11-02 23:13:20,327 INFO L226 Difference]: Without dead ends: 471 [2021-11-02 23:13:20,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:13:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-02 23:13:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 377. [2021-11-02 23:13:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.125) internal successors, (423), 376 states have internal predecessors, (423), 0 states have call successors, (0), 0 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 23:13:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 423 transitions. [2021-11-02 23:13:20,338 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 423 transitions. Word has length 149 [2021-11-02 23:13:20,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:20,338 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 423 transitions. [2021-11-02 23:13:20,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:20,339 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 423 transitions. [2021-11-02 23:13:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-02 23:13:20,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:20,340 INFO L513 BasicCegarLoop]: trace histogram [47, 46, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:20,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:20,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 23:13:20,547 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:20,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2010745921, now seen corresponding path program 44 times [2021-11-02 23:13:20,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:20,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018613670] [2021-11-02 23:13:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:20,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:13:21,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:21,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018613670] [2021-11-02 23:13:21,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018613670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:21,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974904979] [2021-11-02 23:13:21,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:21,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:21,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:21,558 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:21,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 23:13:22,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:22,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:22,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 23:13:22,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:13:23,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974904979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:23,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:23,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-11-02 23:13:23,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803650430] [2021-11-02 23:13:23,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-02 23:13:23,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:23,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-02 23:13:23,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:13:23,061 INFO L87 Difference]: Start difference. First operand 377 states and 423 transitions. Second operand has 50 states, 50 states have (on average 3.08) internal successors, (154), 50 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:23,541 INFO L93 Difference]: Finished difference Result 716 states and 765 transitions. [2021-11-02 23:13:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 23:13:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.08) internal successors, (154), 50 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-02 23:13:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:23,543 INFO L225 Difference]: With dead ends: 716 [2021-11-02 23:13:23,543 INFO L226 Difference]: Without dead ends: 481 [2021-11-02 23:13:23,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:13:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-02 23:13:23,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 385. [2021-11-02 23:13:23,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.125) internal successors, (432), 384 states have internal predecessors, (432), 0 states have call successors, (0), 0 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 23:13:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 432 transitions. [2021-11-02 23:13:23,550 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 432 transitions. Word has length 152 [2021-11-02 23:13:23,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:23,551 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 432 transitions. [2021-11-02 23:13:23,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.08) internal successors, (154), 50 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 432 transitions. [2021-11-02 23:13:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-02 23:13:23,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:23,552 INFO L513 BasicCegarLoop]: trace histogram [48, 47, 47, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:23,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-02 23:13:23,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 23:13:23,755 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:23,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1569574981, now seen corresponding path program 45 times [2021-11-02 23:13:23,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:23,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146916860] [2021-11-02 23:13:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:23,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3340 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:13:24,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:24,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146916860] [2021-11-02 23:13:24,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146916860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:24,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581922513] [2021-11-02 23:13:24,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:13:24,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:24,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:24,730 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:24,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 23:15:24,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-11-02 23:15:24,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:15:25,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:15:25,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3340 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:15:25,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581922513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:25,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:25,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-11-02 23:15:25,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103711684] [2021-11-02 23:15:25,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-02 23:15:25,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:25,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-02 23:15:25,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:15:25,576 INFO L87 Difference]: Start difference. First operand 385 states and 432 transitions. Second operand has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:15:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:26,091 INFO L93 Difference]: Finished difference Result 731 states and 781 transitions. [2021-11-02 23:15:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 23:15:26,091 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-02 23:15:26,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:26,093 INFO L225 Difference]: With dead ends: 731 [2021-11-02 23:15:26,093 INFO L226 Difference]: Without dead ends: 491 [2021-11-02 23:15:26,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:15:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-11-02 23:15:26,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 393. [2021-11-02 23:15:26,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.125) internal successors, (441), 392 states have internal predecessors, (441), 0 states have call successors, (0), 0 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 23:15:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 441 transitions. [2021-11-02 23:15:26,107 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 441 transitions. Word has length 155 [2021-11-02 23:15:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:26,107 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 441 transitions. [2021-11-02 23:15:26,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:15:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 441 transitions. [2021-11-02 23:15:26,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-02 23:15:26,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:26,109 INFO L513 BasicCegarLoop]: trace histogram [49, 48, 48, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:26,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-02 23:15:26,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-02 23:15:26,323 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:15:26,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:26,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1691737599, now seen corresponding path program 46 times [2021-11-02 23:15:26,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:26,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895122883] [2021-11-02 23:15:26,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:26,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3483 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:15:27,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:27,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895122883] [2021-11-02 23:15:27,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895122883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:27,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018004400] [2021-11-02 23:15:27,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:15:27,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:27,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:27,525 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:15:27,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 23:15:28,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:15:28,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:15:28,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-02 23:15:28,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3483 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:15:29,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018004400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:29,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:29,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-02 23:15:29,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517647332] [2021-11-02 23:15:29,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-02 23:15:29,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:29,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-02 23:15:29,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:15:29,239 INFO L87 Difference]: Start difference. First operand 393 states and 441 transitions. Second operand has 52 states, 52 states have (on average 3.076923076923077) internal successors, (160), 52 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 23:15:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:29,795 INFO L93 Difference]: Finished difference Result 746 states and 797 transitions. [2021-11-02 23:15:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-02 23:15:29,796 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.076923076923077) internal successors, (160), 52 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) Word has length 158 [2021-11-02 23:15:29,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:29,798 INFO L225 Difference]: With dead ends: 746 [2021-11-02 23:15:29,798 INFO L226 Difference]: Without dead ends: 501 [2021-11-02 23:15:29,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:15:29,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-02 23:15:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 401. [2021-11-02 23:15:29,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.125) internal successors, (450), 400 states have internal predecessors, (450), 0 states have call successors, (0), 0 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 23:15:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 450 transitions. [2021-11-02 23:15:29,811 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 450 transitions. Word has length 158 [2021-11-02 23:15:29,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:29,812 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 450 transitions. [2021-11-02 23:15:29,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.076923076923077) internal successors, (160), 52 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 23:15:29,812 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 450 transitions. [2021-11-02 23:15:29,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-02 23:15:29,814 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:29,814 INFO L513 BasicCegarLoop]: trace histogram [50, 49, 49, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:29,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:30,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-02 23:15:30,039 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:15:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:30,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1093976571, now seen corresponding path program 47 times [2021-11-02 23:15:30,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:30,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356175793] [2021-11-02 23:15:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:30,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:15:31,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:31,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356175793] [2021-11-02 23:15:31,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356175793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:31,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867463330] [2021-11-02 23:15:31,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:15:31,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:31,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:31,180 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:15:31,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 23:16:03,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2021-11-02 23:16:03,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:03,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:16:03,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:16:03,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867463330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:03,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:03,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-11-02 23:16:03,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652199575] [2021-11-02 23:16:03,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-02 23:16:03,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:03,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-02 23:16:03,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 23:16:03,697 INFO L87 Difference]: Start difference. First operand 401 states and 450 transitions. Second operand has 53 states, 53 states have (on average 3.0754716981132075) internal successors, (163), 53 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 23:16:04,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:04,257 INFO L93 Difference]: Finished difference Result 761 states and 813 transitions. [2021-11-02 23:16:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-02 23:16:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.0754716981132075) internal successors, (163), 53 states have internal predecessors, (163), 0 states have call successors, (0), 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 161 [2021-11-02 23:16:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:04,260 INFO L225 Difference]: With dead ends: 761 [2021-11-02 23:16:04,260 INFO L226 Difference]: Without dead ends: 511 [2021-11-02 23:16:04,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 23:16:04,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-02 23:16:04,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 409. [2021-11-02 23:16:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.125) internal successors, (459), 408 states have internal predecessors, (459), 0 states have call successors, (0), 0 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 23:16:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 459 transitions. [2021-11-02 23:16:04,271 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 459 transitions. Word has length 161 [2021-11-02 23:16:04,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:04,271 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 459 transitions. [2021-11-02 23:16:04,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.0754716981132075) internal successors, (163), 53 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 23:16:04,272 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 459 transitions. [2021-11-02 23:16:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-02 23:16:04,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:04,273 INFO L513 BasicCegarLoop]: trace histogram [51, 50, 50, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:04,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:04,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:04,474 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:04,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:04,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1348245567, now seen corresponding path program 48 times [2021-11-02 23:16:04,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:04,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650562593] [2021-11-02 23:16:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:04,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3778 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:16:05,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:05,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650562593] [2021-11-02 23:16:05,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650562593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:05,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64574617] [2021-11-02 23:16:05,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:16:05,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:05,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:05,602 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:05,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-02 23:20:28,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2021-11-02 23:20:28,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:28,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 23:20:28,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3778 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:20:29,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64574617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:29,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:29,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-02 23:20:29,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291013894] [2021-11-02 23:20:29,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-02 23:20:29,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-02 23:20:29,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:20:29,500 INFO L87 Difference]: Start difference. First operand 409 states and 459 transitions. Second operand has 54 states, 54 states have (on average 3.074074074074074) internal successors, (166), 54 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:30,151 INFO L93 Difference]: Finished difference Result 776 states and 829 transitions. [2021-11-02 23:20:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-02 23:20:30,151 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.074074074074074) internal successors, (166), 54 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-02 23:20:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:30,154 INFO L225 Difference]: With dead ends: 776 [2021-11-02 23:20:30,154 INFO L226 Difference]: Without dead ends: 521 [2021-11-02 23:20:30,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:20:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-11-02 23:20:30,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 417. [2021-11-02 23:20:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.125) internal successors, (468), 416 states have internal predecessors, (468), 0 states have call successors, (0), 0 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 23:20:30,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 468 transitions. [2021-11-02 23:20:30,168 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 468 transitions. Word has length 164 [2021-11-02 23:20:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:30,168 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 468 transitions. [2021-11-02 23:20:30,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.074074074074074) internal successors, (166), 54 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 468 transitions. [2021-11-02 23:20:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-02 23:20:30,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:30,170 INFO L513 BasicCegarLoop]: trace histogram [52, 51, 51, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:30,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-02 23:20:30,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-02 23:20:30,375 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:30,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:30,376 INFO L85 PathProgramCache]: Analyzing trace with hash 841964485, now seen corresponding path program 49 times [2021-11-02 23:20:30,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:30,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633089540] [2021-11-02 23:20:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:30,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3930 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:20:31,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:31,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633089540] [2021-11-02 23:20:31,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633089540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:31,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593492036] [2021-11-02 23:20:31,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:20:31,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:31,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:31,580 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:31,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-02 23:20:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:32,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:20:32,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3930 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:20:33,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593492036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:33,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:33,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-11-02 23:20:33,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718625974] [2021-11-02 23:20:33,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-02 23:20:33,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:33,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-02 23:20:33,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 23:20:33,536 INFO L87 Difference]: Start difference. First operand 417 states and 468 transitions. Second operand has 55 states, 55 states have (on average 3.0727272727272728) internal successors, (169), 55 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:34,196 INFO L93 Difference]: Finished difference Result 791 states and 845 transitions. [2021-11-02 23:20:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 23:20:34,196 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.0727272727272728) internal successors, (169), 55 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-02 23:20:34,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:34,198 INFO L225 Difference]: With dead ends: 791 [2021-11-02 23:20:34,198 INFO L226 Difference]: Without dead ends: 531 [2021-11-02 23:20:34,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 23:20:34,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-02 23:20:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 425. [2021-11-02 23:20:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.125) internal successors, (477), 424 states have internal predecessors, (477), 0 states have call successors, (0), 0 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 23:20:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 477 transitions. [2021-11-02 23:20:34,211 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 477 transitions. Word has length 167 [2021-11-02 23:20:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:34,211 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 477 transitions. [2021-11-02 23:20:34,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.0727272727272728) internal successors, (169), 55 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 477 transitions. [2021-11-02 23:20:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-02 23:20:34,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:34,213 INFO L513 BasicCegarLoop]: trace histogram [53, 52, 52, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:34,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-02 23:20:34,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:34,429 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:34,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2147394175, now seen corresponding path program 50 times [2021-11-02 23:20:34,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:34,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244088275] [2021-11-02 23:20:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:34,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4085 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:20:35,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:35,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244088275] [2021-11-02 23:20:35,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244088275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:35,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352079695] [2021-11-02 23:20:35,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:20:35,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:35,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:35,804 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:35,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-02 23:20:37,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:20:37,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:37,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 23:20:37,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4085 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:20:37,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352079695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:37,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:37,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-11-02 23:20:37,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553207082] [2021-11-02 23:20:37,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-02 23:20:37,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:37,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-02 23:20:37,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:20:37,857 INFO L87 Difference]: Start difference. First operand 425 states and 477 transitions. Second operand has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 56 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 23:20:38,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:38,659 INFO L93 Difference]: Finished difference Result 806 states and 861 transitions. [2021-11-02 23:20:38,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-02 23:20:38,660 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 56 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) Word has length 170 [2021-11-02 23:20:38,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:38,662 INFO L225 Difference]: With dead ends: 806 [2021-11-02 23:20:38,662 INFO L226 Difference]: Without dead ends: 541 [2021-11-02 23:20:38,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:20:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-02 23:20:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 433. [2021-11-02 23:20:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.125) internal successors, (486), 432 states have internal predecessors, (486), 0 states have call successors, (0), 0 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 23:20:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 486 transitions. [2021-11-02 23:20:38,671 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 486 transitions. Word has length 170 [2021-11-02 23:20:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:38,672 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 486 transitions. [2021-11-02 23:20:38,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 56 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 23:20:38,672 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 486 transitions. [2021-11-02 23:20:38,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-02 23:20:38,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:38,673 INFO L513 BasicCegarLoop]: trace histogram [54, 53, 53, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:38,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:38,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:38,895 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:38,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:38,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1274423685, now seen corresponding path program 51 times [2021-11-02 23:20:38,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:38,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61514457] [2021-11-02 23:20:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:38,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4243 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:20:40,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:40,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61514457] [2021-11-02 23:20:40,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61514457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:40,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477756624] [2021-11-02 23:20:40,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:20:40,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:40,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:40,378 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:40,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4279a6-0e64-4bae-92d0-88f4accd873c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process