./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/cartpole_60_safe.c-amalgamation.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/neural-networks/cartpole_60_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme --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 0389ad9d50c843878dee8a18ec5896061861861f9a43d81cdd530afc0915168a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:51:14,128 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:51:14,257 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:51:14,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:51:14,264 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:51:14,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:51:14,308 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:51:14,309 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:51:14,310 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:51:14,316 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:51:14,317 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:51:14,317 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:51:14,318 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:51:14,321 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:51:14,321 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:51:14,322 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:51:14,323 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:51:14,323 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:51:14,324 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:51:14,324 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:51:14,325 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:51:14,326 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:51:14,326 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:51:14,327 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:51:14,327 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:51:14,328 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:51:14,328 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:51:14,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:51:14,330 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:51:14,331 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:51:14,332 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:51:14,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:14,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:51:14,333 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:51:14,334 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:51:14,334 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:51:14,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:51:14,335 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:51:14,335 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:51:14,335 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:51:14,336 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:51:14,336 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:51:14,336 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_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0389ad9d50c843878dee8a18ec5896061861861f9a43d81cdd530afc0915168a [2023-11-26 11:51:14,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:51:14,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:51:14,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:51:14,742 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:51:14,743 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:51:14,744 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/neural-networks/cartpole_60_safe.c-amalgamation.i [2023-11-26 11:51:17,814 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:51:18,247 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:51:18,248 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/sv-benchmarks/c/neural-networks/cartpole_60_safe.c-amalgamation.i [2023-11-26 11:51:18,283 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/data/a05f84c02/c455116509ce499aa541a08365cb2186/FLAGd2d385bb9 [2023-11-26 11:51:18,299 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/data/a05f84c02/c455116509ce499aa541a08365cb2186 [2023-11-26 11:51:18,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:51:18,303 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:51:18,305 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:18,305 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:51:18,316 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:51:18,317 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:18" (1/1) ... [2023-11-26 11:51:18,318 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@439d905f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:18, skipping insertion in model container [2023-11-26 11:51:18,318 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:18" (1/1) ... [2023-11-26 11:51:18,421 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:51:19,432 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_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/sv-benchmarks/c/neural-networks/cartpole_60_safe.c-amalgamation.i[63696,63709] [2023-11-26 11:51:19,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:20,000 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:51:20,089 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_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/sv-benchmarks/c/neural-networks/cartpole_60_safe.c-amalgamation.i[63696,63709] [2023-11-26 11:51:20,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:20,637 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:51:20,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20 WrapperNode [2023-11-26 11:51:20,639 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:20,640 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:20,640 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:51:20,640 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:51:20,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20" (1/1) ... [2023-11-26 11:51:20,769 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20" (1/1) ... [2023-11-26 11:51:20,982 INFO L138 Inliner]: procedures = 620, calls = 4746, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5015 [2023-11-26 11:51:20,983 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:20,984 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:51:20,985 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:51:20,985 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:51:20,997 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20" (1/1) ... [2023-11-26 11:51:20,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20" (1/1) ... [2023-11-26 11:51:21,085 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20" (1/1) ... [2023-11-26 11:51:21,176 INFO L175 MemorySlicer]: Split 4721 memory accesses to 12 slices as follows [2, 7, 257, 65, 4097, 65, 129, 3, 10, 13, 70, 3]. 87 percent of accesses are in the largest equivalence class. The 4687 initializations are split as follows [2, 7, 256, 64, 4096, 64, 128, 2, 4, 0, 64, 0]. The 10 writes are split as follows [0, 0, 0, 0, 0, 0, 0, 0, 3, 4, 2, 1]. [2023-11-26 11:51:21,176 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20" (1/1) ... [2023-11-26 11:51:21,176 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20" (1/1) ... [2023-11-26 11:51:21,370 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20" (1/1) ... [2023-11-26 11:51:21,387 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20" (1/1) ... [2023-11-26 11:51:21,425 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20" (1/1) ... [2023-11-26 11:51:21,454 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20" (1/1) ... [2023-11-26 11:51:21,547 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:51:21,551 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:51:21,551 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:51:21,552 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:51:21,553 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20" (1/1) ... [2023-11-26 11:51:21,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:21,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:21,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:51:21,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:51:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-26 11:51:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-26 11:51:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-26 11:51:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-26 11:51:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-26 11:51:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-26 11:51:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-26 11:51:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-26 11:51:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-26 11:51:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-26 11:51:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-26 11:51:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-26 11:51:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:51:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-26 11:51:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-26 11:51:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-26 11:51:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-26 11:51:21,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-26 11:51:21,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-26 11:51:21,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-26 11:51:21,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-26 11:51:21,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-26 11:51:21,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-26 11:51:21,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-26 11:51:21,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-26 11:51:21,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-26 11:51:21,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-26 11:51:21,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-26 11:51:21,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-26 11:51:21,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-26 11:51:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-26 11:51:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-26 11:51:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-26 11:51:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-26 11:51:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-26 11:51:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-26 11:51:21,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-26 11:51:21,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:51:21,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:51:21,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:51:21,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:51:21,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:51:21,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:51:21,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:51:21,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:51:21,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:51:21,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 11:51:21,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-26 11:51:21,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-26 11:51:21,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-26 11:51:21,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-26 11:51:21,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-26 11:51:21,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-26 11:51:21,933 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:51:21,935 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:51:30,317 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:51:30,748 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:51:30,749 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-26 11:51:30,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:30 BoogieIcfgContainer [2023-11-26 11:51:30,750 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:51:30,753 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:51:30,753 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:51:30,757 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:51:30,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:51:18" (1/3) ... [2023-11-26 11:51:30,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa3bc08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:30, skipping insertion in model container [2023-11-26 11:51:30,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:20" (2/3) ... [2023-11-26 11:51:30,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa3bc08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:30, skipping insertion in model container [2023-11-26 11:51:30,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:30" (3/3) ... [2023-11-26 11:51:30,762 INFO L112 eAbstractionObserver]: Analyzing ICFG cartpole_60_safe.c-amalgamation.i [2023-11-26 11:51:30,783 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:51:30,783 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:51:30,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:51:30,849 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;@5f00fbf1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:51:30,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:51:30,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:51:30,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:30,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:30,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:30,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:30,871 INFO L85 PathProgramCache]: Analyzing trace with hash -531373804, now seen corresponding path program 1 times [2023-11-26 11:51:30,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:30,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238359207] [2023-11-26 11:51:30,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:30,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:32,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:32,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238359207] [2023-11-26 11:51:32,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238359207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:32,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:32,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:32,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348445450] [2023-11-26 11:51:32,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:32,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:51:32,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:32,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:51:32,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:51:32,092 INFO L87 Difference]: Start difference. First operand has 46 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:32,481 INFO L93 Difference]: Finished difference Result 89 states and 155 transitions. [2023-11-26 11:51:32,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:51:32,483 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-26 11:51:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:32,491 INFO L225 Difference]: With dead ends: 89 [2023-11-26 11:51:32,491 INFO L226 Difference]: Without dead ends: 44 [2023-11-26 11:51:32,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:51:32,498 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:32,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:51:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-26 11:51:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-26 11:51:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 43 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-11-26 11:51:32,536 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 27 [2023-11-26 11:51:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:32,536 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-11-26 11:51:32,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-11-26 11:51:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:51:32,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:32,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:32,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:51:32,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:32,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:32,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1087110762, now seen corresponding path program 1 times [2023-11-26 11:51:32,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:32,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242665214] [2023-11-26 11:51:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:32,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:33,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:33,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242665214] [2023-11-26 11:51:33,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242665214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:33,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:33,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:33,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887742116] [2023-11-26 11:51:33,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:33,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:33,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:33,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:33,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:33,512 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:33,931 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2023-11-26 11:51:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:33,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-26 11:51:33,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:33,936 INFO L225 Difference]: With dead ends: 80 [2023-11-26 11:51:33,938 INFO L226 Difference]: Without dead ends: 44 [2023-11-26 11:51:33,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:33,940 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:33,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:51:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-26 11:51:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-26 11:51:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2023-11-26 11:51:33,949 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 27 [2023-11-26 11:51:33,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:33,950 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2023-11-26 11:51:33,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:33,950 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2023-11-26 11:51:33,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:51:33,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:33,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:33,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:51:33,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:33,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:33,953 INFO L85 PathProgramCache]: Analyzing trace with hash -269462312, now seen corresponding path program 1 times [2023-11-26 11:51:33,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:33,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031847935] [2023-11-26 11:51:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:33,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:35,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:35,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031847935] [2023-11-26 11:51:35,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031847935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:35,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:35,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:35,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141578221] [2023-11-26 11:51:35,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:35,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:35,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:35,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:35,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:35,181 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:35,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:35,609 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2023-11-26 11:51:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:35,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-26 11:51:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:35,611 INFO L225 Difference]: With dead ends: 75 [2023-11-26 11:51:35,611 INFO L226 Difference]: Without dead ends: 45 [2023-11-26 11:51:35,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:35,613 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:35,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:51:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-26 11:51:35,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-26 11:51:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2023-11-26 11:51:35,627 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 27 [2023-11-26 11:51:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:35,627 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2023-11-26 11:51:35,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2023-11-26 11:51:35,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:51:35,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:35,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:35,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:51:35,631 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:35,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:35,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1144208086, now seen corresponding path program 1 times [2023-11-26 11:51:35,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:35,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775260985] [2023-11-26 11:51:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:35,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:36,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:36,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775260985] [2023-11-26 11:51:36,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775260985] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:36,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326369227] [2023-11-26 11:51:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:36,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:36,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:36,910 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:36,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:51:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:38,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 5408 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:51:38,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:38,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:51:38,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326369227] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:38,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:38,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-26 11:51:38,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772817460] [2023-11-26 11:51:38,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:38,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:38,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:51:38,700 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:39,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:39,147 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-11-26 11:51:39,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:39,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-26 11:51:39,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:39,149 INFO L225 Difference]: With dead ends: 66 [2023-11-26 11:51:39,149 INFO L226 Difference]: Without dead ends: 46 [2023-11-26 11:51:39,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:51:39,151 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:39,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:51:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-26 11:51:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-26 11:51:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2023-11-26 11:51:39,159 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 28 [2023-11-26 11:51:39,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:39,159 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2023-11-26 11:51:39,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2023-11-26 11:51:39,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-26 11:51:39,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:39,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:39,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:51:39,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:39,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:39,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:39,381 INFO L85 PathProgramCache]: Analyzing trace with hash -372313272, now seen corresponding path program 1 times [2023-11-26 11:51:39,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:39,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334278221] [2023-11-26 11:51:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:39,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:51:40,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:40,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334278221] [2023-11-26 11:51:40,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334278221] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:40,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009866711] [2023-11-26 11:51:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:40,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:40,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:40,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:40,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:51:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:42,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 5426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:51:42,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:51:42,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:51:42,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009866711] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:42,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:42,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-26 11:51:42,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303418778] [2023-11-26 11:51:42,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:42,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:42,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:42,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:42,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:51:42,385 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:42,744 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2023-11-26 11:51:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:42,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-26 11:51:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:42,745 INFO L225 Difference]: With dead ends: 57 [2023-11-26 11:51:42,746 INFO L226 Difference]: Without dead ends: 47 [2023-11-26 11:51:42,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:51:42,747 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:42,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:51:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-26 11:51:42,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-26 11:51:42,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:42,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2023-11-26 11:51:42,754 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2023-11-26 11:51:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:42,755 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2023-11-26 11:51:42,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:42,755 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2023-11-26 11:51:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 11:51:42,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:42,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:42,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:42,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:42,976 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:42,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:42,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2044304526, now seen corresponding path program 1 times [2023-11-26 11:51:42,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:42,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341103389] [2023-11-26 11:51:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:42,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:51:44,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:44,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341103389] [2023-11-26 11:51:44,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341103389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:44,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012120968] [2023-11-26 11:51:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:44,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:44,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:44,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:44,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:51:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:45,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 5444 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:51:45,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:51:45,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:51:45,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012120968] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:45,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:45,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-26 11:51:45,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619935671] [2023-11-26 11:51:45,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:45,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:45,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:51:45,797 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:46,123 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2023-11-26 11:51:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:46,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-26 11:51:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:46,125 INFO L225 Difference]: With dead ends: 74 [2023-11-26 11:51:46,125 INFO L226 Difference]: Without dead ends: 48 [2023-11-26 11:51:46,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:51:46,126 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:46,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:51:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-26 11:51:46,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-26 11:51:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2023-11-26 11:51:46,133 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 34 [2023-11-26 11:51:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:46,134 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2023-11-26 11:51:46,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2023-11-26 11:51:46,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-26 11:51:46,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:46,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:46,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:46,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:51:46,361 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:46,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:46,361 INFO L85 PathProgramCache]: Analyzing trace with hash -359810836, now seen corresponding path program 1 times [2023-11-26 11:51:46,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:46,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798570892] [2023-11-26 11:51:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:46,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:51:47,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798570892] [2023-11-26 11:51:47,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798570892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:47,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910516825] [2023-11-26 11:51:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:47,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:47,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:47,560 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:47,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:51:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:48,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 5450 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:51:48,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:51:49,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:51:49,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910516825] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:49,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:49,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-26 11:51:49,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647003880] [2023-11-26 11:51:49,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:49,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:49,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:49,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:49,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:51:49,046 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:49,406 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2023-11-26 11:51:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-26 11:51:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:49,408 INFO L225 Difference]: With dead ends: 64 [2023-11-26 11:51:49,408 INFO L226 Difference]: Without dead ends: 49 [2023-11-26 11:51:49,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:51:49,409 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:49,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:51:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-26 11:51:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-26 11:51:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2023-11-26 11:51:49,415 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 37 [2023-11-26 11:51:49,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:49,416 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2023-11-26 11:51:49,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:49,416 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2023-11-26 11:51:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 11:51:49,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:49,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:49,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:49,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:51:49,631 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:49,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:49,632 INFO L85 PathProgramCache]: Analyzing trace with hash 242160194, now seen corresponding path program 1 times [2023-11-26 11:51:49,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:49,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271104118] [2023-11-26 11:51:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:49,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:51:50,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:50,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271104118] [2023-11-26 11:51:50,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271104118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:50,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801200380] [2023-11-26 11:51:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:50,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:50,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:50,728 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:50,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:51:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:52,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 5456 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:51:52,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:51:52,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:51:52,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801200380] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:52,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:52,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-26 11:51:52,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099826376] [2023-11-26 11:51:52,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:52,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:52,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:52,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:52,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:51:52,188 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:52,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:52,564 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-11-26 11:51:52,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:52,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-26 11:51:52,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:52,566 INFO L225 Difference]: With dead ends: 54 [2023-11-26 11:51:52,566 INFO L226 Difference]: Without dead ends: 50 [2023-11-26 11:51:52,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:51:52,567 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:52,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:51:52,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-26 11:51:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-26 11:51:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2023-11-26 11:51:52,574 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2023-11-26 11:51:52,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:52,574 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2023-11-26 11:51:52,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2023-11-26 11:51:52,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 11:51:52,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:52,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:52,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:52,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:51:52,797 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:52,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:52,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1371144433, now seen corresponding path program 1 times [2023-11-26 11:51:52,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:52,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801793806] [2023-11-26 11:51:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:52,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:51:53,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:53,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801793806] [2023-11-26 11:51:53,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801793806] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:53,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820469696] [2023-11-26 11:51:53,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:53,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:53,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:53,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:53,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:51:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:55,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 5462 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:51:55,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:51:55,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:51:55,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820469696] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:55,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:55,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2023-11-26 11:51:55,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927198117] [2023-11-26 11:51:55,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:55,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:55,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:55,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:51:55,261 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:55,601 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2023-11-26 11:51:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:51:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-26 11:51:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:55,602 INFO L225 Difference]: With dead ends: 60 [2023-11-26 11:51:55,603 INFO L226 Difference]: Without dead ends: 51 [2023-11-26 11:51:55,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:51:55,604 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:55,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:51:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-26 11:51:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-26 11:51:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.34) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2023-11-26 11:51:55,610 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 43 [2023-11-26 11:51:55,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:55,610 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2023-11-26 11:51:55,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:55,610 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2023-11-26 11:51:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-26 11:51:55,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:55,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:55,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:55,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:55,831 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:55,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:55,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1175858717, now seen corresponding path program 1 times [2023-11-26 11:51:55,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:55,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241512854] [2023-11-26 11:51:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:55,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:51:56,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:56,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241512854] [2023-11-26 11:51:56,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241512854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:56,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566804072] [2023-11-26 11:51:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:56,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:56,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:56,848 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:56,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:51:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:58,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 5476 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:51:58,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:51:58,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:51:58,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566804072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:58,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:58,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-26 11:51:58,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447456172] [2023-11-26 11:51:58,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:58,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:51:58,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:58,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:51:58,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:51:58,354 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:58,746 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2023-11-26 11:51:58,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:51:58,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-11-26 11:51:58,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:58,747 INFO L225 Difference]: With dead ends: 90 [2023-11-26 11:51:58,747 INFO L226 Difference]: Without dead ends: 54 [2023-11-26 11:51:58,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:51:58,748 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:58,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 158 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:51:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-26 11:51:58,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-26 11:51:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2023-11-26 11:51:58,755 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 46 [2023-11-26 11:51:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:58,756 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2023-11-26 11:51:58,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2023-11-26 11:51:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-26 11:51:58,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:58,757 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:58,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:58,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:58,972 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:58,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:58,973 INFO L85 PathProgramCache]: Analyzing trace with hash 482136779, now seen corresponding path program 2 times [2023-11-26 11:51:58,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:58,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120075858] [2023-11-26 11:51:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:58,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 11:51:59,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:59,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120075858] [2023-11-26 11:51:59,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120075858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:59,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887455051] [2023-11-26 11:51:59,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:51:59,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:59,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:59,891 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:59,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:52:01,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:52:01,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:01,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 5509 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:52:01,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 11:52:01,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 11:52:01,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887455051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:01,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:01,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2023-11-26 11:52:01,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639618995] [2023-11-26 11:52:01,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:01,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:52:01,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:01,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:52:01,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:52:01,439 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:01,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:01,993 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2023-11-26 11:52:01,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:52:01,994 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-26 11:52:01,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:01,995 INFO L225 Difference]: With dead ends: 87 [2023-11-26 11:52:01,995 INFO L226 Difference]: Without dead ends: 63 [2023-11-26 11:52:01,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:52:01,996 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:01,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 194 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:52:01,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-26 11:52:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-26 11:52:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2023-11-26 11:52:02,003 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 49 [2023-11-26 11:52:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:02,004 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2023-11-26 11:52:02,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2023-11-26 11:52:02,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-26 11:52:02,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:02,006 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:02,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:02,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:02,212 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:02,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:02,212 INFO L85 PathProgramCache]: Analyzing trace with hash -267777595, now seen corresponding path program 3 times [2023-11-26 11:52:02,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:02,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432338491] [2023-11-26 11:52:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:02,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 11:52:03,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:03,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432338491] [2023-11-26 11:52:03,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432338491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:03,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286236899] [2023-11-26 11:52:03,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:52:03,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:03,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:03,421 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:03,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55bf90b2-9bca-42c2-ad7c-eed6c6d31145/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process