./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/cartpole_67_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_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/neural-networks/cartpole_67_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya --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 3b6e4c980aae893aa9e5822c87914217944c83d013a71b1661d0d248c2ec0be2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:33:24,569 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:33:24,631 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:33:24,635 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:33:24,636 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:33:24,658 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:33:24,658 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:33:24,659 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:33:24,660 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:33:24,660 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:33:24,661 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:33:24,661 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:33:24,662 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:33:24,662 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:33:24,663 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:33:24,664 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:33:24,664 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:33:24,665 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:33:24,665 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:33:24,666 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:33:24,666 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:33:24,667 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:33:24,667 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:33:24,668 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:33:24,668 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:33:24,669 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:33:24,669 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:33:24,669 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:33:24,670 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:33:24,670 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:33:24,671 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:33:24,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:33:24,671 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:33:24,672 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:33:24,672 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:33:24,672 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:33:24,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:33:24,672 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:33:24,673 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:33:24,673 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:33:24,673 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:33:24,673 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:33:24,674 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_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b6e4c980aae893aa9e5822c87914217944c83d013a71b1661d0d248c2ec0be2 [2023-11-28 20:33:24,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:33:24,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:33:24,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:33:24,905 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:33:24,906 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:33:24,907 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/neural-networks/cartpole_67_safe.c-amalgamation.i [2023-11-28 20:33:27,676 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:33:28,026 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:33:28,026 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/sv-benchmarks/c/neural-networks/cartpole_67_safe.c-amalgamation.i [2023-11-28 20:33:28,060 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/data/ce4cad379/9f716b0b7cd94620b4410cf1384906f7/FLAG575f3653d [2023-11-28 20:33:28,075 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/data/ce4cad379/9f716b0b7cd94620b4410cf1384906f7 [2023-11-28 20:33:28,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:33:28,079 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:33:28,080 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:33:28,081 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:33:28,086 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:33:28,086 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:33:28" (1/1) ... [2023-11-28 20:33:28,087 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ec2f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:28, skipping insertion in model container [2023-11-28 20:33:28,088 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:33:28" (1/1) ... [2023-11-28 20:33:28,168 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:33:28,834 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_4491ef5a-b31e-4d34-a930-6c6e7149e927/sv-benchmarks/c/neural-networks/cartpole_67_safe.c-amalgamation.i[63707,63720] [2023-11-28 20:33:29,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:33:29,136 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:33:29,177 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_4491ef5a-b31e-4d34-a930-6c6e7149e927/sv-benchmarks/c/neural-networks/cartpole_67_safe.c-amalgamation.i[63707,63720] [2023-11-28 20:33:29,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:33:29,619 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:33:29,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29 WrapperNode [2023-11-28 20:33:29,620 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:33:29,620 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:33:29,621 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:33:29,621 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:33:29,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29" (1/1) ... [2023-11-28 20:33:29,698 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29" (1/1) ... [2023-11-28 20:33:29,889 INFO L138 Inliner]: procedures = 620, calls = 4746, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5015 [2023-11-28 20:33:29,889 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:33:29,890 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:33:29,890 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:33:29,890 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:33:29,900 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29" (1/1) ... [2023-11-28 20:33:29,900 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29" (1/1) ... [2023-11-28 20:33:29,925 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29" (1/1) ... [2023-11-28 20:33:29,976 INFO L175 MemorySlicer]: Split 4721 memory accesses to 12 slices as follows [2, 7, 257, 65, 4097, 65, 129, 3, 13, 10, 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, 0, 4, 64, 0]. The 10 writes are split as follows [0, 0, 0, 0, 0, 0, 0, 0, 4, 3, 2, 1]. [2023-11-28 20:33:29,976 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29" (1/1) ... [2023-11-28 20:33:29,976 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29" (1/1) ... [2023-11-28 20:33:30,045 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29" (1/1) ... [2023-11-28 20:33:30,055 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29" (1/1) ... [2023-11-28 20:33:30,070 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29" (1/1) ... [2023-11-28 20:33:30,080 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29" (1/1) ... [2023-11-28 20:33:30,097 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:33:30,098 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:33:30,098 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:33:30,098 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:33:30,099 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29" (1/1) ... [2023-11-28 20:33:30,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:33:30,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:33:30,125 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:33:30,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:33:30,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-28 20:33:30,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-28 20:33:30,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-28 20:33:30,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-28 20:33:30,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-28 20:33:30,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-28 20:33:30,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-28 20:33:30,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-28 20:33:30,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-28 20:33:30,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-28 20:33:30,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-28 20:33:30,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-28 20:33:30,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:33:30,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-28 20:33:30,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-28 20:33:30,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-28 20:33:30,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-28 20:33:30,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-28 20:33:30,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-28 20:33:30,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-28 20:33:30,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-28 20:33:30,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-28 20:33:30,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-28 20:33:30,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-28 20:33:30,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-28 20:33:30,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-28 20:33:30,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-28 20:33:30,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-28 20:33:30,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-28 20:33:30,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-28 20:33:30,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-28 20:33:30,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-28 20:33:30,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-28 20:33:30,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-28 20:33:30,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-28 20:33:30,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-28 20:33:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-28 20:33:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:33:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:33:30,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:33:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:33:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:33:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:33:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:33:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 20:33:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 20:33:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-28 20:33:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-28 20:33:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-28 20:33:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-28 20:33:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-28 20:33:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-28 20:33:30,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-28 20:33:30,364 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:33:30,365 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:33:36,791 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:33:37,129 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:33:37,129 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-28 20:33:37,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:33:37 BoogieIcfgContainer [2023-11-28 20:33:37,130 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:33:37,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:33:37,133 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:33:37,136 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:33:37,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:33:28" (1/3) ... [2023-11-28 20:33:37,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56aa64d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:33:37, skipping insertion in model container [2023-11-28 20:33:37,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:33:29" (2/3) ... [2023-11-28 20:33:37,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56aa64d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:33:37, skipping insertion in model container [2023-11-28 20:33:37,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:33:37" (3/3) ... [2023-11-28 20:33:37,138 INFO L112 eAbstractionObserver]: Analyzing ICFG cartpole_67_safe.c-amalgamation.i [2023-11-28 20:33:37,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:33:37,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:33:37,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:33:37,213 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;@67b319ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:33:37,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:33:37,218 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) [2023-11-28 20:33:37,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-28 20:33:37,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:33:37,225 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] [2023-11-28 20:33:37,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:33:37,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:33:37,231 INFO L85 PathProgramCache]: Analyzing trace with hash -531373804, now seen corresponding path program 1 times [2023-11-28 20:33:37,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:33:37,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954257863] [2023-11-28 20:33:37,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:37,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:33:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:33:38,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:33:38,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954257863] [2023-11-28 20:33:38,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954257863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:33:38,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:33:38,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:33:38,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634077107] [2023-11-28 20:33:38,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:33:38,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:33:38,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:33:38,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:33:38,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:33:38,230 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) [2023-11-28 20:33:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:33:38,594 INFO L93 Difference]: Finished difference Result 89 states and 155 transitions. [2023-11-28 20:33:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:33:38,597 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 [2023-11-28 20:33:38,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:33:38,605 INFO L225 Difference]: With dead ends: 89 [2023-11-28 20:33:38,605 INFO L226 Difference]: Without dead ends: 44 [2023-11-28 20:33:38,608 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 [2023-11-28 20:33:38,611 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:33:38,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:33:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-28 20:33:38,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-28 20:33:38,644 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) [2023-11-28 20:33:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-11-28 20:33:38,647 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 27 [2023-11-28 20:33:38,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:33:38,647 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-11-28 20:33:38,647 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) [2023-11-28 20:33:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-11-28 20:33:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-28 20:33:38,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:33:38,649 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] [2023-11-28 20:33:38,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:33:38,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:33:38,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:33:38,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1087110762, now seen corresponding path program 1 times [2023-11-28 20:33:38,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:33:38,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941087090] [2023-11-28 20:33:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:38,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:33:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:33:39,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:33:39,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941087090] [2023-11-28 20:33:39,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941087090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:33:39,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:33:39,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:33:39,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273013144] [2023-11-28 20:33:39,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:33:39,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:33:39,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:33:39,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:33:39,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:33:39,373 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) [2023-11-28 20:33:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:33:39,707 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2023-11-28 20:33:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:33:39,708 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 [2023-11-28 20:33:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:33:39,709 INFO L225 Difference]: With dead ends: 80 [2023-11-28 20:33:39,709 INFO L226 Difference]: Without dead ends: 44 [2023-11-28 20:33:39,709 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 [2023-11-28 20:33:39,711 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:33:39,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:33:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-28 20:33:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-28 20:33:39,717 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) [2023-11-28 20:33:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2023-11-28 20:33:39,718 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 27 [2023-11-28 20:33:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:33:39,719 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2023-11-28 20:33:39,719 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) [2023-11-28 20:33:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2023-11-28 20:33:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-28 20:33:39,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:33:39,720 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] [2023-11-28 20:33:39,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:33:39,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:33:39,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:33:39,721 INFO L85 PathProgramCache]: Analyzing trace with hash -269462312, now seen corresponding path program 1 times [2023-11-28 20:33:39,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:33:39,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997468235] [2023-11-28 20:33:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:39,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:33:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:33:40,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:33:40,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997468235] [2023-11-28 20:33:40,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997468235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:33:40,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:33:40,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:33:40,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099259965] [2023-11-28 20:33:40,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:33:40,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:33:40,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:33:40,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:33:40,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:33:40,781 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) [2023-11-28 20:33:41,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:33:41,139 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2023-11-28 20:33:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:33:41,140 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 [2023-11-28 20:33:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:33:41,141 INFO L225 Difference]: With dead ends: 75 [2023-11-28 20:33:41,141 INFO L226 Difference]: Without dead ends: 45 [2023-11-28 20:33:41,141 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 [2023-11-28 20:33:41,142 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-11-28 20:33:41,143 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] [2023-11-28 20:33:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-28 20:33:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-28 20:33:41,148 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) [2023-11-28 20:33:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2023-11-28 20:33:41,149 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 27 [2023-11-28 20:33:41,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:33:41,150 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2023-11-28 20:33:41,150 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) [2023-11-28 20:33:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2023-11-28 20:33:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-28 20:33:41,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:33:41,151 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] [2023-11-28 20:33:41,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:33:41,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:33:41,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:33:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1144208086, now seen corresponding path program 1 times [2023-11-28 20:33:41,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:33:41,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632345531] [2023-11-28 20:33:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:41,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:33:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:33:42,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:33:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632345531] [2023-11-28 20:33:42,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632345531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000654477] [2023-11-28 20:33:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:42,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:33:42,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:33:42,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:33:42,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:33:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:43,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 5408 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:33:43,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:33:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:33:43,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:33:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:33:43,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000654477] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:43,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:33:43,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-28 20:33:43,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578125273] [2023-11-28 20:33:43,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:33:43,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:33:43,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:33:43,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:33:43,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:33:43,684 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) [2023-11-28 20:33:44,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:33:44,033 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-11-28 20:33:44,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:33:44,033 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 [2023-11-28 20:33:44,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:33:44,034 INFO L225 Difference]: With dead ends: 66 [2023-11-28 20:33:44,034 INFO L226 Difference]: Without dead ends: 46 [2023-11-28 20:33:44,034 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 [2023-11-28 20:33:44,035 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:33:44,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:33:44,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-28 20:33:44,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-28 20:33:44,040 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) [2023-11-28 20:33:44,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2023-11-28 20:33:44,040 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 28 [2023-11-28 20:33:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:33:44,041 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2023-11-28 20:33:44,041 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) [2023-11-28 20:33:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2023-11-28 20:33:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-28 20:33:44,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:33:44,042 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] [2023-11-28 20:33:44,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:33:44,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-28 20:33:44,243 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:33:44,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:33:44,243 INFO L85 PathProgramCache]: Analyzing trace with hash -372313272, now seen corresponding path program 1 times [2023-11-28 20:33:44,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:33:44,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004206300] [2023-11-28 20:33:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:44,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:33:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:33:45,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:33:45,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004206300] [2023-11-28 20:33:45,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004206300] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:45,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958244042] [2023-11-28 20:33:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:45,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:33:45,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:33:45,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:33:45,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:33:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:46,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 5426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:33:46,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:33:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:33:46,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:33:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:33:46,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958244042] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:46,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:33:46,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-28 20:33:46,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351678319] [2023-11-28 20:33:46,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:33:46,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:33:46,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:33:46,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:33:46,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:33:46,783 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) [2023-11-28 20:33:47,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:33:47,098 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2023-11-28 20:33:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:33:47,098 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 [2023-11-28 20:33:47,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:33:47,099 INFO L225 Difference]: With dead ends: 57 [2023-11-28 20:33:47,099 INFO L226 Difference]: Without dead ends: 47 [2023-11-28 20:33:47,100 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 [2023-11-28 20:33:47,101 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:33:47,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:33:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-28 20:33:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-28 20:33:47,105 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) [2023-11-28 20:33:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2023-11-28 20:33:47,106 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2023-11-28 20:33:47,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:33:47,106 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2023-11-28 20:33:47,106 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) [2023-11-28 20:33:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2023-11-28 20:33:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-28 20:33:47,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:33:47,108 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] [2023-11-28 20:33:47,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:33:47,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:33:47,308 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:33:47,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:33:47,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2044304526, now seen corresponding path program 1 times [2023-11-28 20:33:47,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:33:47,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884549944] [2023-11-28 20:33:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:47,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:33:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:33:48,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:33:48,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884549944] [2023-11-28 20:33:48,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884549944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:48,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395834292] [2023-11-28 20:33:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:48,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:33:48,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:33:48,246 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:33:48,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:33:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:49,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 5444 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 20:33:49,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:33:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:33:49,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:33:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:33:49,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395834292] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:49,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:33:49,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-28 20:33:49,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024110899] [2023-11-28 20:33:49,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:33:49,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:33:49,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:33:49,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:33:49,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:33:49,460 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) [2023-11-28 20:33:49,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:33:49,753 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2023-11-28 20:33:49,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:33:49,754 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 [2023-11-28 20:33:49,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:33:49,754 INFO L225 Difference]: With dead ends: 74 [2023-11-28 20:33:49,754 INFO L226 Difference]: Without dead ends: 48 [2023-11-28 20:33:49,755 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 [2023-11-28 20:33:49,756 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 [2023-11-28 20:33:49,756 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] [2023-11-28 20:33:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-28 20:33:49,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-28 20:33:49,762 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) [2023-11-28 20:33:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2023-11-28 20:33:49,763 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 34 [2023-11-28 20:33:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:33:49,763 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2023-11-28 20:33:49,764 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) [2023-11-28 20:33:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2023-11-28 20:33:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-28 20:33:49,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:33:49,765 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] [2023-11-28 20:33:49,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-28 20:33:49,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-28 20:33:49,966 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:33:49,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:33:49,966 INFO L85 PathProgramCache]: Analyzing trace with hash -359810836, now seen corresponding path program 1 times [2023-11-28 20:33:49,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:33:49,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35832130] [2023-11-28 20:33:49,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:49,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:33:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:33:50,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:33:50,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35832130] [2023-11-28 20:33:50,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35832130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:50,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801380754] [2023-11-28 20:33:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:50,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:33:50,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:33:50,764 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:33:50,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:33:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:51,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 5450 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:33:51,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:33:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:33:51,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:33:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-28 20:33:51,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801380754] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:51,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:33:51,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-28 20:33:51,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201073591] [2023-11-28 20:33:51,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:33:51,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:33:51,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:33:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:33:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:33:51,948 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) [2023-11-28 20:33:52,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:33:52,247 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2023-11-28 20:33:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:33:52,248 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 [2023-11-28 20:33:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:33:52,249 INFO L225 Difference]: With dead ends: 64 [2023-11-28 20:33:52,249 INFO L226 Difference]: Without dead ends: 49 [2023-11-28 20:33:52,249 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 [2023-11-28 20:33:52,250 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 [2023-11-28 20:33:52,250 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] [2023-11-28 20:33:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-28 20:33:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-28 20:33:52,255 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) [2023-11-28 20:33:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2023-11-28 20:33:52,255 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 37 [2023-11-28 20:33:52,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:33:52,256 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2023-11-28 20:33:52,256 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) [2023-11-28 20:33:52,256 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2023-11-28 20:33:52,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-28 20:33:52,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:33:52,257 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] [2023-11-28 20:33:52,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:33:52,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:33:52,458 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:33:52,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:33:52,458 INFO L85 PathProgramCache]: Analyzing trace with hash 242160194, now seen corresponding path program 1 times [2023-11-28 20:33:52,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:33:52,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805116604] [2023-11-28 20:33:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:52,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:33:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-28 20:33:53,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:33:53,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805116604] [2023-11-28 20:33:53,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805116604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:53,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830689897] [2023-11-28 20:33:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:53,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:33:53,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:33:53,135 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:33:53,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:33:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:54,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 5456 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:33:54,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:33:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-28 20:33:54,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:33:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:33:54,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830689897] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:54,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:33:54,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-28 20:33:54,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673780965] [2023-11-28 20:33:54,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:33:54,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:33:54,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:33:54,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:33:54,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:33:54,141 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) [2023-11-28 20:33:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:33:54,459 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-11-28 20:33:54,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:33:54,460 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 [2023-11-28 20:33:54,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:33:54,460 INFO L225 Difference]: With dead ends: 54 [2023-11-28 20:33:54,460 INFO L226 Difference]: Without dead ends: 50 [2023-11-28 20:33:54,461 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 [2023-11-28 20:33:54,461 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 [2023-11-28 20:33:54,462 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] [2023-11-28 20:33:54,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-28 20:33:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-28 20:33:54,465 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) [2023-11-28 20:33:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2023-11-28 20:33:54,465 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2023-11-28 20:33:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:33:54,466 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2023-11-28 20:33:54,466 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) [2023-11-28 20:33:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2023-11-28 20:33:54,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-28 20:33:54,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:33:54,466 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] [2023-11-28 20:33:54,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-28 20:33:54,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:33:54,667 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:33:54,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:33:54,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1371144433, now seen corresponding path program 1 times [2023-11-28 20:33:54,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:33:54,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402827984] [2023-11-28 20:33:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:54,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:33:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:33:55,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:33:55,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402827984] [2023-11-28 20:33:55,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402827984] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:55,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231873574] [2023-11-28 20:33:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:55,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:33:55,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:33:55,271 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:33:55,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:33:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:56,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 5462 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:33:56,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:33:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:33:56,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:33:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:33:56,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231873574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:33:56,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:33:56,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-28 20:33:56,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526245135] [2023-11-28 20:33:56,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:33:56,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:33:56,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:33:56,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:33:56,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:33:56,462 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2023-11-28 20:33:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:33:56,942 INFO L93 Difference]: Finished difference Result 95 states and 130 transitions. [2023-11-28 20:33:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 20:33:56,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-28 20:33:56,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:33:56,943 INFO L225 Difference]: With dead ends: 95 [2023-11-28 20:33:56,943 INFO L226 Difference]: Without dead ends: 60 [2023-11-28 20:33:56,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:33:56,944 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:33:56,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 230 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:33:56,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-28 20:33:56,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-28 20:33:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 59 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:33:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2023-11-28 20:33:56,951 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 43 [2023-11-28 20:33:56,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:33:56,951 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2023-11-28 20:33:56,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2023-11-28 20:33:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2023-11-28 20:33:56,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-28 20:33:56,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:33:56,953 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 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] [2023-11-28 20:33:56,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-28 20:33:57,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:33:57,156 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:33:57,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:33:57,156 INFO L85 PathProgramCache]: Analyzing trace with hash 528894503, now seen corresponding path program 2 times [2023-11-28 20:33:57,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:33:57,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474237149] [2023-11-28 20:33:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:57,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:33:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-28 20:33:57,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:33:57,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474237149] [2023-11-28 20:33:57,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474237149] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:57,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946957697] [2023-11-28 20:33:57,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:33:57,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:33:57,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:33:57,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:33:57,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:33:58,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:33:58,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:33:59,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 5527 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 20:33:59,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:33:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-28 20:33:59,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:33:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-28 20:33:59,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946957697] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:59,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:33:59,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-11-28 20:33:59,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487188669] [2023-11-28 20:33:59,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:33:59,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:33:59,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:33:59,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:33:59,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:33:59,064 INFO L87 Difference]: Start difference. First operand 60 states and 79 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) [2023-11-28 20:33:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:33:59,351 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2023-11-28 20:33:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:33:59,352 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 53 [2023-11-28 20:33:59,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:33:59,353 INFO L225 Difference]: With dead ends: 70 [2023-11-28 20:33:59,353 INFO L226 Difference]: Without dead ends: 61 [2023-11-28 20:33:59,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:33:59,354 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 [2023-11-28 20:33:59,354 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] [2023-11-28 20:33:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-28 20:33:59,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-28 20:33:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 60 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) [2023-11-28 20:33:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2023-11-28 20:33:59,359 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 53 [2023-11-28 20:33:59,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:33:59,359 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2023-11-28 20:33:59,360 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) [2023-11-28 20:33:59,360 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2023-11-28 20:33:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-28 20:33:59,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:33:59,361 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 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] [2023-11-28 20:33:59,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-28 20:33:59,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 20:33:59,562 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:33:59,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:33:59,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1861807109, now seen corresponding path program 1 times [2023-11-28 20:33:59,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:33:59,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421147222] [2023-11-28 20:33:59,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:33:59,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:33:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-28 20:34:00,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:00,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421147222] [2023-11-28 20:34:00,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421147222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:00,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748911471] [2023-11-28 20:34:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:00,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:00,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:00,380 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:00,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:34:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:01,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 5541 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:34:01,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-28 20:34:01,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-28 20:34:01,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748911471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:34:01,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:34:01,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2023-11-28 20:34:01,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863065132] [2023-11-28 20:34:01,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:34:01,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 20:34:01,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:01,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 20:34:01,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:34:01,450 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:01,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:01,984 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2023-11-28 20:34:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:34:01,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-28 20:34:01,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:01,985 INFO L225 Difference]: With dead ends: 116 [2023-11-28 20:34:01,985 INFO L226 Difference]: Without dead ends: 71 [2023-11-28 20:34:01,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:34:01,987 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:34:01,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 267 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:34:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-28 20:34:01,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-28 20:34:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2023-11-28 20:34:01,994 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 56 [2023-11-28 20:34:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:01,995 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2023-11-28 20:34:01,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2023-11-28 20:34:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-28 20:34:01,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:01,996 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 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] [2023-11-28 20:34:02,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:34:02,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-28 20:34:02,197 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:02,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:02,197 INFO L85 PathProgramCache]: Analyzing trace with hash -78359747, now seen corresponding path program 2 times [2023-11-28 20:34:02,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:02,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274316956] [2023-11-28 20:34:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:02,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-28 20:34:03,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:03,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274316956] [2023-11-28 20:34:03,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274316956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:03,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445971943] [2023-11-28 20:34:03,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:34:03,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:03,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:03,188 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:03,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:34:04,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:34:04,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:34:04,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 5606 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:34:04,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-28 20:34:04,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-28 20:34:04,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445971943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:34:04,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:34:04,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 10] total 15 [2023-11-28 20:34:04,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307969173] [2023-11-28 20:34:04,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:34:04,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-28 20:34:04,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:04,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-28 20:34:04,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-28 20:34:04,578 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) [2023-11-28 20:34:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:05,194 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2023-11-28 20:34:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:34:05,194 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) Word has length 66 [2023-11-28 20:34:05,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:05,195 INFO L225 Difference]: With dead ends: 126 [2023-11-28 20:34:05,195 INFO L226 Difference]: Without dead ends: 72 [2023-11-28 20:34:05,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-28 20:34:05,196 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:34:05,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 388 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 20:34:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-28 20:34:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-28 20:34:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.323943661971831) internal successors, (94), 71 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2023-11-28 20:34:05,203 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 66 [2023-11-28 20:34:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:05,203 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2023-11-28 20:34:05,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) [2023-11-28 20:34:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2023-11-28 20:34:05,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-28 20:34:05,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:05,205 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-11-28 20:34:05,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:34:05,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-28 20:34:05,405 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:05,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:05,406 INFO L85 PathProgramCache]: Analyzing trace with hash -789509461, now seen corresponding path program 3 times [2023-11-28 20:34:05,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:05,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841183951] [2023-11-28 20:34:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:05,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-28 20:34:06,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:06,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841183951] [2023-11-28 20:34:06,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841183951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:06,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806302566] [2023-11-28 20:34:06,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:34:06,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:06,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:06,254 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:06,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:34:07,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:34:07,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:34:07,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 5473 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 20:34:07,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-28 20:34:07,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-28 20:34:07,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806302566] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:07,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:34:07,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 12 [2023-11-28 20:34:07,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117940794] [2023-11-28 20:34:07,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:34:07,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:34:07,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:07,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:34:07,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:34:07,595 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:07,854 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2023-11-28 20:34:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:34:07,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-28 20:34:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:07,855 INFO L225 Difference]: With dead ends: 104 [2023-11-28 20:34:07,855 INFO L226 Difference]: Without dead ends: 73 [2023-11-28 20:34:07,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:34:07,856 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-11-28 20:34:07,856 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] [2023-11-28 20:34:07,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-28 20:34:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-28 20:34:07,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2023-11-28 20:34:07,861 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 67 [2023-11-28 20:34:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:07,861 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2023-11-28 20:34:07,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2023-11-28 20:34:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-28 20:34:07,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:07,862 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-11-28 20:34:07,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 20:34:08,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 20:34:08,063 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:08,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:08,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1264911644, now seen corresponding path program 1 times [2023-11-28 20:34:08,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:08,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826507326] [2023-11-28 20:34:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:08,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-28 20:34:08,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:08,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826507326] [2023-11-28 20:34:08,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826507326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:08,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214510639] [2023-11-28 20:34:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:08,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:08,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:08,901 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:08,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:34:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:10,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 5631 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:34:10,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-28 20:34:10,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:34:10,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214510639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:34:10,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:34:10,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-28 20:34:10,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684888474] [2023-11-28 20:34:10,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:34:10,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:34:10,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:10,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:34:10,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:34:10,047 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:10,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:10,310 INFO L93 Difference]: Finished difference Result 129 states and 171 transitions. [2023-11-28 20:34:10,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:34:10,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-28 20:34:10,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:10,311 INFO L225 Difference]: With dead ends: 129 [2023-11-28 20:34:10,311 INFO L226 Difference]: Without dead ends: 76 [2023-11-28 20:34:10,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:34:10,313 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:34:10,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:34:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-28 20:34:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-11-28 20:34:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 73 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2023-11-28 20:34:10,320 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 70 [2023-11-28 20:34:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:10,320 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2023-11-28 20:34:10,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2023-11-28 20:34:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-28 20:34:10,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:10,321 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2023-11-28 20:34:10,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-28 20:34:10,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:10,522 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:10,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:10,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1148367932, now seen corresponding path program 1 times [2023-11-28 20:34:10,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:10,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365633907] [2023-11-28 20:34:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:10,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-28 20:34:11,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:11,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365633907] [2023-11-28 20:34:11,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365633907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:11,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382414110] [2023-11-28 20:34:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:11,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:11,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:11,425 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:11,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:34:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:12,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 5645 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-28 20:34:12,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-28 20:34:12,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-28 20:34:12,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382414110] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:12,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:34:12,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 9] total 16 [2023-11-28 20:34:12,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510258372] [2023-11-28 20:34:12,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:34:12,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:34:12,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:12,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:34:12,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:34:12,777 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:13,079 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2023-11-28 20:34:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:34:13,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-11-28 20:34:13,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:13,080 INFO L225 Difference]: With dead ends: 129 [2023-11-28 20:34:13,080 INFO L226 Difference]: Without dead ends: 75 [2023-11-28 20:34:13,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:34:13,081 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:34:13,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 79 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:34:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-28 20:34:13,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-28 20:34:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 74 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2023-11-28 20:34:13,088 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 73 [2023-11-28 20:34:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:13,088 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2023-11-28 20:34:13,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2023-11-28 20:34:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-28 20:34:13,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:13,089 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2023-11-28 20:34:13,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 20:34:13,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 20:34:13,290 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:13,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:13,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1864594645, now seen corresponding path program 1 times [2023-11-28 20:34:13,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:13,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891112804] [2023-11-28 20:34:13,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:13,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-28 20:34:14,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:14,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891112804] [2023-11-28 20:34:14,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891112804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:14,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307867955] [2023-11-28 20:34:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:14,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:14,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:14,180 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:14,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 20:34:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:15,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 5650 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-28 20:34:15,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-28 20:34:15,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-28 20:34:15,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307867955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:34:15,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:34:15,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 8] total 16 [2023-11-28 20:34:15,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930882939] [2023-11-28 20:34:15,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:34:15,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-28 20:34:15,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:15,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 20:34:15,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:34:15,524 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:16,533 INFO L93 Difference]: Finished difference Result 149 states and 202 transitions. [2023-11-28 20:34:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 20:34:16,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-11-28 20:34:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:16,535 INFO L225 Difference]: With dead ends: 149 [2023-11-28 20:34:16,535 INFO L226 Difference]: Without dead ends: 94 [2023-11-28 20:34:16,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2023-11-28 20:34:16,536 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 63 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:34:16,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 353 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-28 20:34:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-28 20:34:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-28 20:34:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.3118279569892473) internal successors, (122), 93 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:16,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2023-11-28 20:34:16,542 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 74 [2023-11-28 20:34:16,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:16,542 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2023-11-28 20:34:16,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2023-11-28 20:34:16,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-28 20:34:16,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:16,543 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 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] [2023-11-28 20:34:16,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 20:34:16,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 20:34:16,743 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:16,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:16,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1696741860, now seen corresponding path program 2 times [2023-11-28 20:34:16,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:16,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397009521] [2023-11-28 20:34:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:16,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-28 20:34:17,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:17,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397009521] [2023-11-28 20:34:17,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397009521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:17,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260494780] [2023-11-28 20:34:17,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:34:17,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:17,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:17,975 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:17,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 20:34:19,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:34:19,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:34:19,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 5763 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-28 20:34:19,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-28 20:34:19,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-11-28 20:34:19,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260494780] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:34:19,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:34:19,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 6] total 26 [2023-11-28 20:34:19,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987028957] [2023-11-28 20:34:19,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:34:19,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:34:19,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:19,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:34:19,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:34:19,483 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:20,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:20,605 INFO L93 Difference]: Finished difference Result 178 states and 236 transitions. [2023-11-28 20:34:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-28 20:34:20,605 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 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 93 [2023-11-28 20:34:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:20,606 INFO L225 Difference]: With dead ends: 178 [2023-11-28 20:34:20,606 INFO L226 Difference]: Without dead ends: 101 [2023-11-28 20:34:20,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2023-11-28 20:34:20,607 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:34:20,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 689 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 20:34:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-28 20:34:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-11-28 20:34:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 98 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2023-11-28 20:34:20,616 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 93 [2023-11-28 20:34:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:20,616 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2023-11-28 20:34:20,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2023-11-28 20:34:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-28 20:34:20,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:20,617 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 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, 1, 1, 1] [2023-11-28 20:34:20,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 20:34:20,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:34:20,818 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:20,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:20,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1183577982, now seen corresponding path program 3 times [2023-11-28 20:34:20,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:20,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108793055] [2023-11-28 20:34:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:20,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-28 20:34:22,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:22,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108793055] [2023-11-28 20:34:22,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108793055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:22,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941328557] [2023-11-28 20:34:22,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:34:22,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:22,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:22,167 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:22,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 20:34:24,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:34:24,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:34:24,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 5573 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:34:24,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-28 20:34:24,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:34:24,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941328557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:34:24,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:34:24,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2023-11-28 20:34:24,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369870410] [2023-11-28 20:34:24,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:34:24,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:34:24,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:24,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:34:24,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:34:24,148 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:24,594 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2023-11-28 20:34:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:34:24,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2023-11-28 20:34:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:24,595 INFO L225 Difference]: With dead ends: 135 [2023-11-28 20:34:24,595 INFO L226 Difference]: Without dead ends: 103 [2023-11-28 20:34:24,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:34:24,596 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 13 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:34:24,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 149 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:34:24,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-28 20:34:24,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2023-11-28 20:34:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.292929292929293) internal successors, (128), 99 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2023-11-28 20:34:24,604 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 98 [2023-11-28 20:34:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:24,605 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2023-11-28 20:34:24,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2023-11-28 20:34:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-28 20:34:24,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:24,606 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 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, 1, 1, 1, 1] [2023-11-28 20:34:24,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 20:34:24,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 20:34:24,807 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:24,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:24,807 INFO L85 PathProgramCache]: Analyzing trace with hash -132685079, now seen corresponding path program 1 times [2023-11-28 20:34:24,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:24,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773633777] [2023-11-28 20:34:24,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:24,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-28 20:34:26,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:26,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773633777] [2023-11-28 20:34:26,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773633777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:26,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490166666] [2023-11-28 20:34:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:26,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:26,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:26,253 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:26,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 20:34:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:27,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 5796 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-28 20:34:27,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-28 20:34:27,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-28 20:34:27,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490166666] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:34:27,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:34:27,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 7] total 24 [2023-11-28 20:34:27,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192255130] [2023-11-28 20:34:27,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:34:27,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-28 20:34:27,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:27,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-28 20:34:27,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-11-28 20:34:27,708 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:28,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:28,984 INFO L93 Difference]: Finished difference Result 158 states and 211 transitions. [2023-11-28 20:34:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-28 20:34:28,984 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-11-28 20:34:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:28,985 INFO L225 Difference]: With dead ends: 158 [2023-11-28 20:34:28,985 INFO L226 Difference]: Without dead ends: 123 [2023-11-28 20:34:28,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:34:28,987 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 73 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:34:28,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 567 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 20:34:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-28 20:34:28,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2023-11-28 20:34:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3) internal successors, (156), 120 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 156 transitions. [2023-11-28 20:34:28,993 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 156 transitions. Word has length 99 [2023-11-28 20:34:28,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:28,993 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 156 transitions. [2023-11-28 20:34:28,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 156 transitions. [2023-11-28 20:34:28,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-28 20:34:28,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:28,994 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 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, 1, 1, 1, 1] [2023-11-28 20:34:29,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 20:34:29,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:29,195 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:29,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:29,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1400755345, now seen corresponding path program 2 times [2023-11-28 20:34:29,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:29,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116354725] [2023-11-28 20:34:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:29,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-28 20:34:30,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:30,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116354725] [2023-11-28 20:34:30,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116354725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:30,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103902855] [2023-11-28 20:34:30,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:34:30,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:30,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:30,684 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:30,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 20:34:32,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:34:32,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:34:32,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 5922 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-28 20:34:32,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-28 20:34:32,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-11-28 20:34:32,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103902855] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:34:32,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:34:32,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 13] total 37 [2023-11-28 20:34:32,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510675503] [2023-11-28 20:34:32,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:34:32,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-28 20:34:32,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:32,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-28 20:34:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2023-11-28 20:34:32,775 INFO L87 Difference]: Start difference. First operand 121 states and 156 transitions. Second operand has 37 states, 37 states have (on average 4.486486486486487) internal successors, (166), 37 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:38,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:38,893 INFO L93 Difference]: Finished difference Result 215 states and 293 transitions. [2023-11-28 20:34:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-28 20:34:38,893 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.486486486486487) internal successors, (166), 37 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2023-11-28 20:34:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:38,895 INFO L225 Difference]: With dead ends: 215 [2023-11-28 20:34:38,895 INFO L226 Difference]: Without dead ends: 162 [2023-11-28 20:34:38,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=444, Invalid=1718, Unknown=0, NotChecked=0, Total=2162 [2023-11-28 20:34:38,896 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 170 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 2105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:34:38,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1403 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2105 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-28 20:34:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-28 20:34:38,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2023-11-28 20:34:38,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3081761006289307) internal successors, (208), 159 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 208 transitions. [2023-11-28 20:34:38,907 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 208 transitions. Word has length 120 [2023-11-28 20:34:38,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:38,907 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 208 transitions. [2023-11-28 20:34:38,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.486486486486487) internal successors, (166), 37 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:38,908 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 208 transitions. [2023-11-28 20:34:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-28 20:34:38,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:38,908 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 13, 13, 13, 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, 1, 1, 1, 1] [2023-11-28 20:34:38,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-28 20:34:39,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:39,109 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:39,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash -508552599, now seen corresponding path program 3 times [2023-11-28 20:34:39,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:39,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199752074] [2023-11-28 20:34:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:39,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2023-11-28 20:34:40,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:40,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199752074] [2023-11-28 20:34:40,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199752074] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:40,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438235544] [2023-11-28 20:34:40,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:34:40,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:40,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:40,826 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:40,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 20:34:42,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:34:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:34:43,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 5573 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-28 20:34:43,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2023-11-28 20:34:43,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 987 trivial. 0 not checked. [2023-11-28 20:34:43,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438235544] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:43,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:34:43,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16, 6] total 22 [2023-11-28 20:34:43,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746470320] [2023-11-28 20:34:43,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:34:43,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:34:43,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:43,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:34:43,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-11-28 20:34:43,162 INFO L87 Difference]: Start difference. First operand 160 states and 208 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:43,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:43,554 INFO L93 Difference]: Finished difference Result 171 states and 222 transitions. [2023-11-28 20:34:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:34:43,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2023-11-28 20:34:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:43,555 INFO L225 Difference]: With dead ends: 171 [2023-11-28 20:34:43,555 INFO L226 Difference]: Without dead ends: 161 [2023-11-28 20:34:43,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-11-28 20:34:43,556 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:34:43,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 115 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:34:43,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-28 20:34:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2023-11-28 20:34:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.30625) internal successors, (209), 160 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 209 transitions. [2023-11-28 20:34:43,568 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 209 transitions. Word has length 159 [2023-11-28 20:34:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:43,568 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 209 transitions. [2023-11-28 20:34:43,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:43,569 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 209 transitions. [2023-11-28 20:34:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-28 20:34:43,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:43,570 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 13, 13, 13, 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, 1, 1, 1, 1, 1] [2023-11-28 20:34:43,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-28 20:34:43,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:43,770 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:43,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:43,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1229781546, now seen corresponding path program 1 times [2023-11-28 20:34:43,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:43,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203109722] [2023-11-28 20:34:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:43,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2023-11-28 20:34:45,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:45,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203109722] [2023-11-28 20:34:45,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203109722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:45,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739069250] [2023-11-28 20:34:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:45,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:45,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:45,473 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:45,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 20:34:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:46,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 6161 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-28 20:34:46,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2023-11-28 20:34:47,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 360 proven. 494 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-28 20:34:48,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739069250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:34:48,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:34:48,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 30] total 45 [2023-11-28 20:34:48,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494157467] [2023-11-28 20:34:48,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:34:48,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-28 20:34:48,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:48,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-28 20:34:48,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1669, Unknown=0, NotChecked=0, Total=1980 [2023-11-28 20:34:48,092 INFO L87 Difference]: Start difference. First operand 161 states and 209 transitions. Second operand has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 45 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:05,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:05,262 INFO L93 Difference]: Finished difference Result 296 states and 402 transitions. [2023-11-28 20:35:05,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-28 20:35:05,263 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 45 states have internal predecessors, (175), 0 states have call successors, (0), 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 160 [2023-11-28 20:35:05,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:05,265 INFO L225 Difference]: With dead ends: 296 [2023-11-28 20:35:05,265 INFO L226 Difference]: Without dead ends: 206 [2023-11-28 20:35:05,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=714, Invalid=2592, Unknown=0, NotChecked=0, Total=3306 [2023-11-28 20:35:05,267 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 189 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 1826 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:05,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 1526 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1826 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-28 20:35:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-28 20:35:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2023-11-28 20:35:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.3121951219512196) internal successors, (269), 205 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2023-11-28 20:35:05,278 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 160 [2023-11-28 20:35:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:05,278 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2023-11-28 20:35:05,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 45 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2023-11-28 20:35:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-28 20:35:05,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:05,279 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 22, 22, 22, 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, 1, 1, 1, 1, 1] [2023-11-28 20:35:05,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-28 20:35:05,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:05,480 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:05,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:05,480 INFO L85 PathProgramCache]: Analyzing trace with hash -82907376, now seen corresponding path program 2 times [2023-11-28 20:35:05,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:05,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099422228] [2023-11-28 20:35:05,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:05,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2023-11-28 20:35:08,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099422228] [2023-11-28 20:35:08,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099422228] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:35:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026114997] [2023-11-28 20:35:08,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:35:08,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:08,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:08,510 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:08,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-28 20:35:09,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:35:09,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:35:10,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 6431 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-28 20:35:10,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 0 proven. 1832 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-28 20:35:10,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2023-11-28 20:35:12,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026114997] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:35:12,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:35:12,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 48, 25] total 77 [2023-11-28 20:35:12,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076541351] [2023-11-28 20:35:12,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:35:12,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-28 20:35:12,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:12,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-28 20:35:12,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=5144, Unknown=0, NotChecked=0, Total=5852 [2023-11-28 20:35:12,445 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand has 77 states, 77 states have (on average 3.727272727272727) internal successors, (287), 77 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:04,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:04,190 INFO L93 Difference]: Finished difference Result 373 states and 515 transitions. [2023-11-28 20:38:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-28 20:38:04,191 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.727272727272727) internal successors, (287), 77 states have internal predecessors, (287), 0 states have call successors, (0), 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 205 [2023-11-28 20:38:04,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:04,192 INFO L225 Difference]: With dead ends: 373 [2023-11-28 20:38:04,192 INFO L226 Difference]: Without dead ends: 283 [2023-11-28 20:38:04,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 169.3s TimeCoverageRelationStatistics Valid=1764, Invalid=7938, Unknown=0, NotChecked=0, Total=9702 [2023-11-28 20:38:04,196 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 630 mSDsluCounter, 3685 mSDsCounter, 0 mSdLazyCounter, 7877 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 3771 SdHoareTripleChecker+Invalid, 7879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:04,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 3771 Invalid, 7879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7877 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-28 20:38:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-28 20:38:04,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2023-11-28 20:38:04,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.3178571428571428) internal successors, (369), 280 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 369 transitions. [2023-11-28 20:38:04,208 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 369 transitions. Word has length 205 [2023-11-28 20:38:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:04,208 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 369 transitions. [2023-11-28 20:38:04,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.727272727272727) internal successors, (287), 77 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 369 transitions. [2023-11-28 20:38:04,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-11-28 20:38:04,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:04,210 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 29, 29, 29, 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, 1, 1, 1, 1, 1] [2023-11-28 20:38:04,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-28 20:38:04,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-28 20:38:04,410 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:38:04,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:04,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1800432854, now seen corresponding path program 3 times [2023-11-28 20:38:04,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:04,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103249137] [2023-11-28 20:38:04,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:04,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4426 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 3179 trivial. 0 not checked. [2023-11-28 20:38:08,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:08,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103249137] [2023-11-28 20:38:08,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103249137] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:08,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556092799] [2023-11-28 20:38:08,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:38:08,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:08,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:08,207 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:08,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-28 20:38:10,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:38:10,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:38:10,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 5573 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-28 20:38:10,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4426 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4415 trivial. 0 not checked. [2023-11-28 20:38:10,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4426 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4424 trivial. 0 not checked. [2023-11-28 20:38:10,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556092799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:10,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:10,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 8, 6] total 42 [2023-11-28 20:38:10,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489671636] [2023-11-28 20:38:10,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:10,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-28 20:38:10,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:10,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-28 20:38:10,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2023-11-28 20:38:10,808 INFO L87 Difference]: Start difference. First operand 281 states and 369 transitions. Second operand has 42 states, 42 states have (on average 4.190476190476191) internal successors, (176), 42 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:13,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:13,714 INFO L93 Difference]: Finished difference Result 460 states and 609 transitions. [2023-11-28 20:38:13,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-28 20:38:13,715 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.190476190476191) internal successors, (176), 42 states have internal predecessors, (176), 0 states have call successors, (0), 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 280 [2023-11-28 20:38:13,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:13,716 INFO L225 Difference]: With dead ends: 460 [2023-11-28 20:38:13,716 INFO L226 Difference]: Without dead ends: 298 [2023-11-28 20:38:13,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=1837, Unknown=0, NotChecked=0, Total=1980 [2023-11-28 20:38:13,718 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 88 mSDsluCounter, 1980 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 3857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:13,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 2046 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-28 20:38:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-28 20:38:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 296. [2023-11-28 20:38:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.3186440677966103) internal successors, (389), 295 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 389 transitions. [2023-11-28 20:38:13,731 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 389 transitions. Word has length 280 [2023-11-28 20:38:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:13,732 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 389 transitions. [2023-11-28 20:38:13,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.190476190476191) internal successors, (176), 42 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 389 transitions. [2023-11-28 20:38:13,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-11-28 20:38:13,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:13,734 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 30, 30, 30, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:38:13,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-28 20:38:13,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:13,935 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:38:13,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:13,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1267327331, now seen corresponding path program 4 times [2023-11-28 20:38:13,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:13,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427126284] [2023-11-28 20:38:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:13,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2023-11-28 20:38:18,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:18,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427126284] [2023-11-28 20:38:18,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427126284] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:18,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470986374] [2023-11-28 20:38:18,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:38:18,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:18,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:18,046 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:18,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-28 20:38:19,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:38:19,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:38:19,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 6918 conjuncts, 126 conjunts are in the unsatisfiable core [2023-11-28 20:38:19,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2023-11-28 20:38:19,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 1456 proven. 2670 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-28 20:38:24,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470986374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:24,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:24,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 64] total 96 [2023-11-28 20:38:24,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383594620] [2023-11-28 20:38:24,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:24,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-28 20:38:24,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:24,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-28 20:38:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1212, Invalid=7908, Unknown=0, NotChecked=0, Total=9120 [2023-11-28 20:38:24,504 INFO L87 Difference]: Start difference. First operand 296 states and 389 transitions. Second operand has 96 states, 96 states have (on average 3.4166666666666665) internal successors, (328), 96 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:29,970 WARN L293 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 122 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 20:48:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:48:02,797 INFO L93 Difference]: Finished difference Result 566 states and 779 transitions. [2023-11-28 20:48:02,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-28 20:48:02,798 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.4166666666666665) internal successors, (328), 96 states have internal predecessors, (328), 0 states have call successors, (0), 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 287 [2023-11-28 20:48:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:48:02,800 INFO L225 Difference]: With dead ends: 566 [2023-11-28 20:48:02,800 INFO L226 Difference]: Without dead ends: 392 [2023-11-28 20:48:02,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 577.2s TimeCoverageRelationStatistics Valid=3159, Invalid=12588, Unknown=3, NotChecked=0, Total=15750 [2023-11-28 20:48:02,804 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 815 mSDsluCounter, 4157 mSDsCounter, 0 mSdLazyCounter, 7101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 4226 SdHoareTripleChecker+Invalid, 7104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:48:02,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [815 Valid, 4226 Invalid, 7104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7101 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-11-28 20:48:02,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-11-28 20:48:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2023-11-28 20:48:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.3222506393861893) internal successors, (517), 391 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:48:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 517 transitions. [2023-11-28 20:48:02,820 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 517 transitions. Word has length 287 [2023-11-28 20:48:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:48:02,821 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 517 transitions. [2023-11-28 20:48:02,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.4166666666666665) internal successors, (328), 96 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:48:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 517 transitions. [2023-11-28 20:48:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2023-11-28 20:48:02,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:48:02,823 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 46, 46, 46, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:48:02,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-28 20:48:03,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4491ef5a-b31e-4d34-a930-6c6e7149e927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-28 20:48:03,023 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:48:03,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:48:03,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1900116637, now seen corresponding path program 5 times [2023-11-28 20:48:03,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:48:03,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044240216] [2023-11-28 20:48:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:48:03,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:48:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat