./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --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 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:39:46,001 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:39:46,122 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 21:39:46,137 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:39:46,138 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:39:46,184 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:39:46,186 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:39:46,187 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:39:46,188 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 21:39:46,193 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 21:39:46,194 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:39:46,195 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:39:46,195 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:39:46,198 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:39:46,198 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:39:46,199 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:39:46,199 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:39:46,200 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:39:46,200 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:39:46,201 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:39:46,201 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:39:46,204 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:39:46,205 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:39:46,205 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:39:46,206 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:39:46,206 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:39:46,207 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:39:46,208 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:39:46,208 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:39:46,209 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:39:46,210 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:39:46,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:39:46,211 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:39:46,212 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:39:46,212 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:39:46,212 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:39:46,213 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:39:46,213 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:39:46,213 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:39:46,213 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:39:46,214 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:39:46,214 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:39:46,214 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 [2023-11-23 21:39:46,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:39:46,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:39:46,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:39:46,575 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:39:46,575 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:39:46,577 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/reducercommutativity/avg10-2.i [2023-11-23 21:39:49,863 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:39:50,141 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:39:50,143 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/sv-benchmarks/c/reducercommutativity/avg10-2.i [2023-11-23 21:39:50,152 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/data/4e6e08c55/946e55f4e12546dc9e5e4c1a5e0f1df1/FLAG8bd977b65 [2023-11-23 21:39:50,174 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/data/4e6e08c55/946e55f4e12546dc9e5e4c1a5e0f1df1 [2023-11-23 21:39:50,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:39:50,182 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:39:50,186 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:39:50,186 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:39:50,192 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:39:50,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba89b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50, skipping insertion in model container [2023-11-23 21:39:50,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,225 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:39:50,455 WARN L240 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_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/sv-benchmarks/c/reducercommutativity/avg10-2.i[1282,1295] [2023-11-23 21:39:50,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:39:50,469 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:39:50,495 WARN L240 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_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/sv-benchmarks/c/reducercommutativity/avg10-2.i[1282,1295] [2023-11-23 21:39:50,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:39:50,513 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:39:50,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50 WrapperNode [2023-11-23 21:39:50,514 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:39:50,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:39:50,516 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:39:50,516 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:39:50,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,536 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,561 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-23 21:39:50,562 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:39:50,563 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:39:50,563 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:39:50,564 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:39:50,584 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,591 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,602 INFO L189 HeapSplitter]: Split 12 memory accesses to 2 slices as follows [2, 10] [2023-11-23 21:39:50,603 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,603 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,610 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,614 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,615 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,617 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,619 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:39:50,621 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:39:50,621 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:39:50,621 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:39:50,622 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50" (1/1) ... [2023-11-23 21:39:50,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:39:50,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:50,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:39:50,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:39:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:39:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 21:39:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 21:39:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:39:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 21:39:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 21:39:50,707 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2023-11-23 21:39:50,707 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2023-11-23 21:39:50,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:39:50,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:39:50,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 21:39:50,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 21:39:50,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:39:50,793 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:39:50,796 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:39:50,966 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:39:51,015 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:39:51,015 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:39:51,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:39:51 BoogieIcfgContainer [2023-11-23 21:39:51,021 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:39:51,027 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:39:51,027 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:39:51,031 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:39:51,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:39:50" (1/3) ... [2023-11-23 21:39:51,032 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfb774d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:39:51, skipping insertion in model container [2023-11-23 21:39:51,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:50" (2/3) ... [2023-11-23 21:39:51,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfb774d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:39:51, skipping insertion in model container [2023-11-23 21:39:51,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:39:51" (3/3) ... [2023-11-23 21:39:51,036 INFO L112 eAbstractionObserver]: Analyzing ICFG avg10-2.i [2023-11-23 21:39:51,057 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:39:51,057 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:39:51,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:39:51,131 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3700744c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:39:51,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:39:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:39:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 21:39:51,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:51,147 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:51,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:51,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:51,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1444276640, now seen corresponding path program 1 times [2023-11-23 21:39:51,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:51,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056721440] [2023-11-23 21:39:51,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:51,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:51,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 21:39:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:51,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 21:39:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:51,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 21:39:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:39:51,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:51,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056721440] [2023-11-23 21:39:51,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056721440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:51,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61290454] [2023-11-23 21:39:51,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:51,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:51,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:51,672 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:51,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:39:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:51,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 21:39:51,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:39:51,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:39:51,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61290454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:39:51,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:39:51,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-11-23 21:39:51,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87028843] [2023-11-23 21:39:51,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:39:51,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:39:51,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:51,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:39:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:39:51,840 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:39:51,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:51,875 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2023-11-23 21:39:51,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:39:51,877 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-11-23 21:39:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:51,885 INFO L225 Difference]: With dead ends: 38 [2023-11-23 21:39:51,885 INFO L226 Difference]: Without dead ends: 18 [2023-11-23 21:39:51,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:39:51,892 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:51,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:51,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-23 21:39:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-23 21:39:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:39:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-23 21:39:51,932 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 25 [2023-11-23 21:39:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:51,934 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-23 21:39:51,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:39:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-23 21:39:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 21:39:51,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:51,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:51,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:52,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:52,148 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:52,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:52,149 INFO L85 PathProgramCache]: Analyzing trace with hash -265195610, now seen corresponding path program 1 times [2023-11-23 21:39:52,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:52,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774306658] [2023-11-23 21:39:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:52,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:52,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 21:39:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:52,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 21:39:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:52,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 21:39:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:39:52,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:52,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774306658] [2023-11-23 21:39:52,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774306658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:52,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998090507] [2023-11-23 21:39:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:52,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:52,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:52,441 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:52,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:39:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:52,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:39:52,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:39:52,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:39:52,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998090507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:39:52,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:39:52,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:39:52,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208934324] [2023-11-23 21:39:52,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:39:52,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:39:52,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:52,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:39:52,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:39:52,589 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:39:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:52,613 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-11-23 21:39:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:39:52,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-23 21:39:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:52,615 INFO L225 Difference]: With dead ends: 35 [2023-11-23 21:39:52,615 INFO L226 Difference]: Without dead ends: 19 [2023-11-23 21:39:52,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:39:52,625 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:52,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:52,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-23 21:39:52,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-23 21:39:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:39:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-23 21:39:52,632 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 25 [2023-11-23 21:39:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:52,633 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-23 21:39:52,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:39:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-23 21:39:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 21:39:52,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:52,635 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:52,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:52,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:52,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:52,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:52,836 INFO L85 PathProgramCache]: Analyzing trace with hash 774126172, now seen corresponding path program 1 times [2023-11-23 21:39:52,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:52,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77049566] [2023-11-23 21:39:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:52,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:52,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-23 21:39:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:52,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 21:39:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:52,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-23 21:39:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:39:53,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:53,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77049566] [2023-11-23 21:39:53,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77049566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:53,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752341831] [2023-11-23 21:39:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:53,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:53,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:53,017 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:53,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:39:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:53,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:39:53,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:39:53,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:39:53,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752341831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:39:53,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:39:53,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-23 21:39:53,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646616718] [2023-11-23 21:39:53,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:39:53,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:39:53,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:53,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:39:53,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:39:53,149 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:39:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:53,199 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2023-11-23 21:39:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:39:53,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-23 21:39:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:53,201 INFO L225 Difference]: With dead ends: 34 [2023-11-23 21:39:53,201 INFO L226 Difference]: Without dead ends: 20 [2023-11-23 21:39:53,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:39:53,204 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:53,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-23 21:39:53,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-23 21:39:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:39:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-23 21:39:53,211 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 26 [2023-11-23 21:39:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:53,212 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-23 21:39:53,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:39:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-23 21:39:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:39:53,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:53,214 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:53,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-23 21:39:53,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:53,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:53,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:53,444 INFO L85 PathProgramCache]: Analyzing trace with hash 406480427, now seen corresponding path program 1 times [2023-11-23 21:39:53,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:53,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940203867] [2023-11-23 21:39:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:53,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:53,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-23 21:39:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:53,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-23 21:39:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:53,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-23 21:39:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:39:53,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:53,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940203867] [2023-11-23 21:39:53,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940203867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:53,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629682036] [2023-11-23 21:39:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:53,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:53,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:53,663 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:53,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:39:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:53,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:39:53,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:39:53,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:39:53,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629682036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:39:53,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:39:53,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 21:39:53,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654269064] [2023-11-23 21:39:53,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:39:53,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:39:53,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:53,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:39:53,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:39:53,789 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:39:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:53,810 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2023-11-23 21:39:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:39:53,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-11-23 21:39:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:53,812 INFO L225 Difference]: With dead ends: 32 [2023-11-23 21:39:53,813 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 21:39:53,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:39:53,815 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:53,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:53,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 21:39:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-23 21:39:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:39:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-23 21:39:53,821 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 29 [2023-11-23 21:39:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:53,822 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-23 21:39:53,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:39:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-23 21:39:53,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 21:39:53,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:53,824 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:53,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:54,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:54,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:54,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:54,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1488649810, now seen corresponding path program 1 times [2023-11-23 21:39:54,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:54,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125045669] [2023-11-23 21:39:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:54,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:54,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-23 21:39:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:54,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-23 21:39:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:54,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-23 21:39:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-23 21:39:54,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:54,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125045669] [2023-11-23 21:39:54,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125045669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:54,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832672822] [2023-11-23 21:39:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:54,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:54,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:54,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:54,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:39:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:54,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:39:54,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-23 21:39:54,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:39:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-23 21:39:54,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832672822] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:39:54,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:39:54,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-11-23 21:39:54,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508427527] [2023-11-23 21:39:54,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:39:54,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:39:54,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:39:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:39:54,472 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-23 21:39:54,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:54,515 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-11-23 21:39:54,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:39:54,516 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), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2023-11-23 21:39:54,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:54,517 INFO L225 Difference]: With dead ends: 42 [2023-11-23 21:39:54,517 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 21:39:54,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:39:54,519 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:54,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 21:39:54,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-23 21:39:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:39:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-23 21:39:54,527 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2023-11-23 21:39:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:54,527 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-23 21:39:54,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-23 21:39:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-23 21:39:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 21:39:54,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:54,529 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:54,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:54,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:54,752 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:54,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:54,752 INFO L85 PathProgramCache]: Analyzing trace with hash -944391140, now seen corresponding path program 2 times [2023-11-23 21:39:54,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:54,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997984644] [2023-11-23 21:39:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:54,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:54,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 21:39:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:54,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 21:39:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:54,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 21:39:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 21:39:54,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:54,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997984644] [2023-11-23 21:39:54,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997984644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:54,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186997639] [2023-11-23 21:39:54,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:39:54,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:54,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:54,899 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:54,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:39:55,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:39:55,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:39:55,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:39:55,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-23 21:39:55,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:39:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-23 21:39:55,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186997639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:39:55,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:39:55,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-11-23 21:39:55,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709017691] [2023-11-23 21:39:55,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:39:55,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:39:55,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:55,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:39:55,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:39:55,199 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:39:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:55,273 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2023-11-23 21:39:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:39:55,274 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2023-11-23 21:39:55,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:55,275 INFO L225 Difference]: With dead ends: 49 [2023-11-23 21:39:55,275 INFO L226 Difference]: Without dead ends: 31 [2023-11-23 21:39:55,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:39:55,278 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:55,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-23 21:39:55,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-23 21:39:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:39:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-23 21:39:55,288 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 33 [2023-11-23 21:39:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:55,289 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-23 21:39:55,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:39:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-23 21:39:55,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 21:39:55,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:55,291 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:55,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:55,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:39:55,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:55,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1083945041, now seen corresponding path program 3 times [2023-11-23 21:39:55,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:55,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461062955] [2023-11-23 21:39:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:55,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:55,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-23 21:39:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:55,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-23 21:39:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:55,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-23 21:39:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-23 21:39:55,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:55,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461062955] [2023-11-23 21:39:55,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461062955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:55,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843357557] [2023-11-23 21:39:55,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:39:55,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:55,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:55,669 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:55,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:39:55,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:39:55,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:39:55,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:39:55,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-23 21:39:55,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:39:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-23 21:39:55,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843357557] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:39:55,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:39:55,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-23 21:39:55,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225419636] [2023-11-23 21:39:55,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:39:55,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:39:55,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:55,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:39:55,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:39:55,858 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:39:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:55,901 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-11-23 21:39:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:39:55,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2023-11-23 21:39:55,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:55,905 INFO L225 Difference]: With dead ends: 53 [2023-11-23 21:39:55,905 INFO L226 Difference]: Without dead ends: 36 [2023-11-23 21:39:55,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:39:55,934 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:55,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-23 21:39:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-23 21:39:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:39:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-11-23 21:39:55,952 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2023-11-23 21:39:55,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:55,954 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-11-23 21:39:55,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:39:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-11-23 21:39:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 21:39:55,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:55,960 INFO L195 NwaCegarLoop]: trace histogram [18, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:55,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:56,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 21:39:56,174 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:56,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:56,174 INFO L85 PathProgramCache]: Analyzing trace with hash -407743002, now seen corresponding path program 4 times [2023-11-23 21:39:56,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:56,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892727829] [2023-11-23 21:39:56,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:56,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:56,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-23 21:39:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:56,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-23 21:39:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:56,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-23 21:39:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-11-23 21:39:56,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:56,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892727829] [2023-11-23 21:39:56,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892727829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:56,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619287926] [2023-11-23 21:39:56,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:39:56,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:56,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:56,544 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:56,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:39:56,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:39:56,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:39:56,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:39:56,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-11-23 21:39:56,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:39:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-11-23 21:39:56,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619287926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:39:56,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:39:56,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2023-11-23 21:39:56,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122990396] [2023-11-23 21:39:56,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:39:56,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:39:56,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:56,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:39:56,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:39:56,810 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:39:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:56,872 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2023-11-23 21:39:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:39:56,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2023-11-23 21:39:56,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:56,875 INFO L225 Difference]: With dead ends: 62 [2023-11-23 21:39:56,875 INFO L226 Difference]: Without dead ends: 40 [2023-11-23 21:39:56,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:39:56,881 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:56,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:56,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-23 21:39:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-23 21:39:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:39:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-11-23 21:39:56,900 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 55 [2023-11-23 21:39:56,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:56,903 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-11-23 21:39:56,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:39:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-11-23 21:39:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 21:39:56,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:56,907 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:56,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:57,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 21:39:57,121 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:57,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:57,121 INFO L85 PathProgramCache]: Analyzing trace with hash -760350682, now seen corresponding path program 5 times [2023-11-23 21:39:57,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:57,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836150770] [2023-11-23 21:39:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:57,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:57,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-23 21:39:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:57,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 21:39:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:57,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 21:39:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2023-11-23 21:39:57,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:57,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836150770] [2023-11-23 21:39:57,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836150770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:57,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810053594] [2023-11-23 21:39:57,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 21:39:57,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:57,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:57,388 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:57,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:39:57,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-23 21:39:57,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:39:57,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:39:57,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 248 proven. 3 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-11-23 21:39:57,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:39:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2023-11-23 21:39:57,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810053594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:39:57,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:39:57,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-23 21:39:57,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551871151] [2023-11-23 21:39:57,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:39:57,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:39:57,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:57,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:39:57,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:39:57,741 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:39:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:57,783 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2023-11-23 21:39:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:39:57,784 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2023-11-23 21:39:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:57,789 INFO L225 Difference]: With dead ends: 64 [2023-11-23 21:39:57,789 INFO L226 Difference]: Without dead ends: 44 [2023-11-23 21:39:57,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:39:57,792 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:57,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:57,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-23 21:39:57,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-23 21:39:57,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:39:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2023-11-23 21:39:57,809 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 67 [2023-11-23 21:39:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:57,812 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2023-11-23 21:39:57,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:39:57,812 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2023-11-23 21:39:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:39:57,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:57,819 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:57,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:58,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:58,041 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:58,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:58,041 INFO L85 PathProgramCache]: Analyzing trace with hash 316189286, now seen corresponding path program 6 times [2023-11-23 21:39:58,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:58,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304402909] [2023-11-23 21:39:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:58,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:58,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-23 21:39:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:58,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 21:39:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:58,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-23 21:39:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2023-11-23 21:39:58,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:58,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304402909] [2023-11-23 21:39:58,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304402909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:58,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671027758] [2023-11-23 21:39:58,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 21:39:58,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:58,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:58,347 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:58,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:39:58,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-23 21:39:58,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:39:58,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:39:58,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 248 proven. 21 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-11-23 21:39:58,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:39:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2023-11-23 21:39:58,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671027758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:39:58,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:39:58,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2023-11-23 21:39:58,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468204750] [2023-11-23 21:39:58,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:39:58,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:39:58,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:58,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:39:58,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:39:58,785 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:39:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:58,818 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2023-11-23 21:39:58,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:39:58,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2023-11-23 21:39:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:58,820 INFO L225 Difference]: With dead ends: 67 [2023-11-23 21:39:58,820 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 21:39:58,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:39:58,821 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:58,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:58,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 21:39:58,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-23 21:39:58,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:39:58,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-11-23 21:39:58,829 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 71 [2023-11-23 21:39:58,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:58,830 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-11-23 21:39:58,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:39:58,830 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-11-23 21:39:58,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 21:39:58,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:58,831 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:58,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:59,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2a98ef-0102-4de7-8798-fb0a7ec41e2f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:39:59,045 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:59,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1131911855, now seen corresponding path program 7 times [2023-11-23 21:39:59,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:59,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153052262] [2023-11-23 21:39:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:59,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:40:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat