./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c55d57654781cf0634666e1c7d4e43dff0d9410f4306aded3e4e446e1f9e88d1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:40:49,972 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:40:50,091 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 21:40:50,103 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:40:50,104 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:40:50,144 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:40:50,146 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:40:50,147 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:40:50,148 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 21:40:50,153 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 21:40:50,153 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:40:50,154 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:40:50,155 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:40:50,157 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:40:50,157 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:40:50,158 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:40:50,158 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:40:50,159 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:40:50,159 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:40:50,160 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:40:50,160 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:40:50,161 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:40:50,161 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:40:50,162 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:40:50,162 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:40:50,163 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:40:50,163 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:40:50,164 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:40:50,165 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:40:50,165 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:40:50,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:40:50,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:40:50,167 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:40:50,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:40:50,168 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:40:50,168 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:40:50,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:40:50,169 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:40:50,169 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:40:50,170 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:40:50,170 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:40:50,170 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:40:50,171 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_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c55d57654781cf0634666e1c7d4e43dff0d9410f4306aded3e4e446e1f9e88d1 [2023-11-23 21:40:50,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:40:50,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:40:50,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:40:50,486 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:40:50,487 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:40:50,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2023-11-23 21:40:53,671 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:40:53,861 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:40:53,861 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2023-11-23 21:40:53,870 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/data/a8aa21320/7550f0f65fd946ac9df09ba1ff6d76ba/FLAG599296b66 [2023-11-23 21:40:53,885 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/data/a8aa21320/7550f0f65fd946ac9df09ba1ff6d76ba [2023-11-23 21:40:53,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:40:53,890 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:40:53,892 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:40:53,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:40:53,898 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:40:53,899 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:40:53" (1/1) ... [2023-11-23 21:40:53,900 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa1f168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:53, skipping insertion in model container [2023-11-23 21:40:53,901 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:40:53" (1/1) ... [2023-11-23 21:40:53,924 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:40:54,095 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_ae6e45a7-3696-4edf-81f9-e3212f14eb85/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c[588,601] [2023-11-23 21:40:54,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:40:54,136 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:40:54,149 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_ae6e45a7-3696-4edf-81f9-e3212f14eb85/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c[588,601] [2023-11-23 21:40:54,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:40:54,176 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:40:54,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54 WrapperNode [2023-11-23 21:40:54,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:40:54,178 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:40:54,178 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:40:54,178 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:40:54,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54" (1/1) ... [2023-11-23 21:40:54,194 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54" (1/1) ... [2023-11-23 21:40:54,224 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2023-11-23 21:40:54,225 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:40:54,226 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:40:54,226 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:40:54,226 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:40:54,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54" (1/1) ... [2023-11-23 21:40:54,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54" (1/1) ... [2023-11-23 21:40:54,239 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54" (1/1) ... [2023-11-23 21:40:54,249 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 21:40:54,249 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54" (1/1) ... [2023-11-23 21:40:54,250 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54" (1/1) ... [2023-11-23 21:40:54,253 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54" (1/1) ... [2023-11-23 21:40:54,257 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54" (1/1) ... [2023-11-23 21:40:54,258 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54" (1/1) ... [2023-11-23 21:40:54,259 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54" (1/1) ... [2023-11-23 21:40:54,261 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:40:54,262 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:40:54,263 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:40:54,263 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:40:54,264 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54" (1/1) ... [2023-11-23 21:40:54,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:40:54,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:40:54,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:40:54,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:40:54,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:40:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 21:40:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:40:54,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:40:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:40:54,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:40:54,413 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:40:54,415 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:40:54,575 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:40:54,600 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:40:54,600 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:40:54,601 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:40:54 BoogieIcfgContainer [2023-11-23 21:40:54,601 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:40:54,604 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:40:54,604 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:40:54,608 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:40:54,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:40:53" (1/3) ... [2023-11-23 21:40:54,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47091d75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:40:54, skipping insertion in model container [2023-11-23 21:40:54,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:40:54" (2/3) ... [2023-11-23 21:40:54,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47091d75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:40:54, skipping insertion in model container [2023-11-23 21:40:54,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:40:54" (3/3) ... [2023-11-23 21:40:54,611 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound100.c [2023-11-23 21:40:54,631 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:40:54,632 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:40:54,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:40:54,689 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;@5add8bc0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:40:54,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:40:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 21:40:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 21:40:54,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:40:54,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 21:40:54,702 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:40:54,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:40:54,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1379524608, now seen corresponding path program 1 times [2023-11-23 21:40:54,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:40:54,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352912478] [2023-11-23 21:40:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:54,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:40:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:40:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:40:54,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:40:54,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352912478] [2023-11-23 21:40:54,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352912478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:40:54,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:40:54,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:40:54,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749164460] [2023-11-23 21:40:54,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:40:54,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:40:54,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:40:54,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:40:54,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:40:54,964 INFO L87 Difference]: Start difference. First operand has 23 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:40:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:40:54,999 INFO L93 Difference]: Finished difference Result 45 states and 82 transitions. [2023-11-23 21:40:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:40:55,001 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-23 21:40:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:40:55,014 INFO L225 Difference]: With dead ends: 45 [2023-11-23 21:40:55,014 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 21:40:55,019 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 [2023-11-23 21:40:55,028 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:40:55,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:40:55,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 21:40:55,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-23 21:40:55,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-23 21:40:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 32 transitions. [2023-11-23 21:40:55,104 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 32 transitions. Word has length 6 [2023-11-23 21:40:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:40:55,105 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 32 transitions. [2023-11-23 21:40:55,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:40:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 32 transitions. [2023-11-23 21:40:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:40:55,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:40:55,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:40:55,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:40:55,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:40:55,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:40:55,110 INFO L85 PathProgramCache]: Analyzing trace with hash -345068235, now seen corresponding path program 1 times [2023-11-23 21:40:55,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:40:55,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951550646] [2023-11-23 21:40:55,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:55,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:40:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:40:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:40:55,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:40:55,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951550646] [2023-11-23 21:40:55,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951550646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:40:55,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:40:55,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:40:55,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178057595] [2023-11-23 21:40:55,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:40:55,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:40:55,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:40:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:40:55,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:40:55,314 INFO L87 Difference]: Start difference. First operand 21 states and 32 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:40:55,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:40:55,339 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2023-11-23 21:40:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:40:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 21:40:55,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:40:55,340 INFO L225 Difference]: With dead ends: 35 [2023-11-23 21:40:55,341 INFO L226 Difference]: Without dead ends: 23 [2023-11-23 21:40:55,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:40:55,343 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:40:55,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:40:55,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-23 21:40:55,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-23 21:40:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-23 21:40:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2023-11-23 21:40:55,354 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 7 [2023-11-23 21:40:55,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:40:55,354 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2023-11-23 21:40:55,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:40:55,355 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2023-11-23 21:40:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:40:55,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:40:55,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:40:55,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:40:55,356 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:40:55,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:40:55,357 INFO L85 PathProgramCache]: Analyzing trace with hash -343519103, now seen corresponding path program 1 times [2023-11-23 21:40:55,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:40:55,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114183173] [2023-11-23 21:40:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:55,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:40:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:40:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:40:55,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:40:55,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114183173] [2023-11-23 21:40:55,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114183173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:40:55,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:40:55,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:40:55,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203921345] [2023-11-23 21:40:55,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:40:55,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:40:55,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:40:55,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:40:55,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:40:55,638 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:40:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:40:55,761 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2023-11-23 21:40:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:40:55,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 21:40:55,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:40:55,763 INFO L225 Difference]: With dead ends: 29 [2023-11-23 21:40:55,763 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 21:40:55,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:40:55,765 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:40:55,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 77 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:40:55,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 21:40:55,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-23 21:40:55,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-23 21:40:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2023-11-23 21:40:55,800 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 7 [2023-11-23 21:40:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:40:55,800 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2023-11-23 21:40:55,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:40:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2023-11-23 21:40:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:40:55,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:40:55,802 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:40:55,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:40:55,802 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:40:55,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:40:55,803 INFO L85 PathProgramCache]: Analyzing trace with hash -875596316, now seen corresponding path program 1 times [2023-11-23 21:40:55,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:40:55,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504213849] [2023-11-23 21:40:55,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:55,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:40:55,829 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:40:55,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314732424] [2023-11-23 21:40:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:40:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:40:55,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:40:55,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:40:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:40:55,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:40:55,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:40:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:40:56,010 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:40:56,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:40:56,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504213849] [2023-11-23 21:40:56,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:40:56,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314732424] [2023-11-23 21:40:56,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314732424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:40:56,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:40:56,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:40:56,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029525377] [2023-11-23 21:40:56,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:40:56,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:40:56,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:40:56,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:40:56,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:40:56,015 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:40:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:40:56,096 INFO L93 Difference]: Finished difference Result 45 states and 65 transitions. [2023-11-23 21:40:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:40:56,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-23 21:40:56,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:40:56,099 INFO L225 Difference]: With dead ends: 45 [2023-11-23 21:40:56,100 INFO L226 Difference]: Without dead ends: 43 [2023-11-23 21:40:56,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:40:56,105 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:40:56,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 106 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:40:56,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-23 21:40:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2023-11-23 21:40:56,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-23 21:40:56,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-11-23 21:40:56,138 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 12 [2023-11-23 21:40:56,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:40:56,138 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-11-23 21:40:56,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:40:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-11-23 21:40:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:40:56,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:40:56,141 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:40:56,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:40:56,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:40:56,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:40:56,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:40:56,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2105691681, now seen corresponding path program 1 times [2023-11-23 21:40:56,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:40:56,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430772999] [2023-11-23 21:40:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:56,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:40:56,374 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:40:56,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791104695] [2023-11-23 21:40:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:56,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:40:56,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:40:56,385 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:40:56,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:40:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:40:56,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:40:56,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:40:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:40:56,539 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:40:56,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:40:56,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430772999] [2023-11-23 21:40:56,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:40:56,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791104695] [2023-11-23 21:40:56,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791104695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:40:56,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:40:56,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:40:56,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148662413] [2023-11-23 21:40:56,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:40:56,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:40:56,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:40:56,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:40:56,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:40:56,553 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:40:56,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:40:56,648 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2023-11-23 21:40:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:40:56,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-23 21:40:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:40:56,650 INFO L225 Difference]: With dead ends: 49 [2023-11-23 21:40:56,651 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 21:40:56,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:40:56,652 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:40:56,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:40:56,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 21:40:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2023-11-23 21:40:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-23 21:40:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2023-11-23 21:40:56,670 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 17 [2023-11-23 21:40:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:40:56,671 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2023-11-23 21:40:56,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:40:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2023-11-23 21:40:56,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:40:56,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:40:56,672 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:40:56,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:40:56,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:40:56,889 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:40:56,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:40:56,890 INFO L85 PathProgramCache]: Analyzing trace with hash 168504260, now seen corresponding path program 1 times [2023-11-23 21:40:56,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:40:56,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989625942] [2023-11-23 21:40:56,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:56,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:40:56,902 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:40:56,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975213324] [2023-11-23 21:40:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:56,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:40:56,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:40:56,909 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:40:56,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:40:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:40:56,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:40:56,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:40:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:40:57,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:40:57,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:40:57,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989625942] [2023-11-23 21:40:57,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:40:57,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975213324] [2023-11-23 21:40:57,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975213324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:40:57,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:40:57,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:40:57,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194911169] [2023-11-23 21:40:57,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:40:57,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:40:57,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:40:57,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:40:57,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:40:57,057 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:40:57,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:40:57,146 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2023-11-23 21:40:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:40:57,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2023-11-23 21:40:57,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:40:57,148 INFO L225 Difference]: With dead ends: 57 [2023-11-23 21:40:57,148 INFO L226 Difference]: Without dead ends: 45 [2023-11-23 21:40:57,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:40:57,149 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:40:57,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 107 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:40:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-23 21:40:57,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-23 21:40:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 21:40:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2023-11-23 21:40:57,164 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 22 [2023-11-23 21:40:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:40:57,165 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2023-11-23 21:40:57,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:40:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2023-11-23 21:40:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 21:40:57,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:40:57,167 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:40:57,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:40:57,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:40:57,382 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:40:57,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:40:57,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1666200982, now seen corresponding path program 1 times [2023-11-23 21:40:57,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:40:57,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131498045] [2023-11-23 21:40:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:57,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:40:57,398 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:40:57,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780204286] [2023-11-23 21:40:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:57,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:40:57,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:40:57,400 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:40:57,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:40:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:40:57,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:40:57,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:40:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-23 21:40:57,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:40:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:40:57,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:40:57,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131498045] [2023-11-23 21:40:57,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:40:57,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780204286] [2023-11-23 21:40:57,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780204286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:40:57,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:40:57,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-23 21:40:57,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979972258] [2023-11-23 21:40:57,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:40:57,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:40:57,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:40:57,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:40:57,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:40:57,646 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-23 21:40:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:40:57,851 INFO L93 Difference]: Finished difference Result 115 states and 150 transitions. [2023-11-23 21:40:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:40:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 40 [2023-11-23 21:40:57,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:40:57,858 INFO L225 Difference]: With dead ends: 115 [2023-11-23 21:40:57,858 INFO L226 Difference]: Without dead ends: 99 [2023-11-23 21:40:57,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:40:57,864 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 57 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:40:57,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 132 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:40:57,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-23 21:40:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2023-11-23 21:40:57,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 38 states have call successors, (38), 10 states have call predecessors, (38), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-23 21:40:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 126 transitions. [2023-11-23 21:40:57,917 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 126 transitions. Word has length 40 [2023-11-23 21:40:57,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:40:57,918 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 126 transitions. [2023-11-23 21:40:57,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-23 21:40:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 126 transitions. [2023-11-23 21:40:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 21:40:57,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:40:57,924 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:40:57,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:40:58,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:40:58,147 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:40:58,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:40:58,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2136650998, now seen corresponding path program 1 times [2023-11-23 21:40:58,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:40:58,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596932055] [2023-11-23 21:40:58,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:58,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:40:58,160 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:40:58,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101483172] [2023-11-23 21:40:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:58,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:40:58,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:40:58,174 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:40:58,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:40:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:40:58,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 21:40:58,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:40:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 21:40:58,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:40:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 21:40:58,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:40:58,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596932055] [2023-11-23 21:40:58,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:40:58,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101483172] [2023-11-23 21:40:58,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101483172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:40:58,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:40:58,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-23 21:40:58,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600454039] [2023-11-23 21:40:58,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:40:58,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 21:40:58,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:40:58,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 21:40:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:40:58,645 INFO L87 Difference]: Start difference. First operand 95 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-23 21:40:59,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:40:59,007 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2023-11-23 21:40:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:40:59,008 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 40 [2023-11-23 21:40:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:40:59,010 INFO L225 Difference]: With dead ends: 113 [2023-11-23 21:40:59,011 INFO L226 Difference]: Without dead ends: 111 [2023-11-23 21:40:59,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:40:59,013 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:40:59,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 104 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:40:59,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-23 21:40:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-11-23 21:40:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 61 states have internal predecessors, (65), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-23 21:40:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2023-11-23 21:40:59,073 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 40 [2023-11-23 21:40:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:40:59,075 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2023-11-23 21:40:59,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-23 21:40:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2023-11-23 21:40:59,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:40:59,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:40:59,077 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:40:59,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:40:59,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:40:59,294 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:40:59,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:40:59,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1054982331, now seen corresponding path program 2 times [2023-11-23 21:40:59,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:40:59,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097933823] [2023-11-23 21:40:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:40:59,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:40:59,309 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:40:59,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847686154] [2023-11-23 21:40:59,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:40:59,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:40:59,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:40:59,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:40:59,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:40:59,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:40:59,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:40:59,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 21:40:59,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:40:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:40:59,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:40:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:40:59,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:40:59,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097933823] [2023-11-23 21:40:59,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:40:59,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847686154] [2023-11-23 21:40:59,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847686154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:40:59,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:40:59,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-11-23 21:40:59,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939129277] [2023-11-23 21:40:59,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:40:59,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:40:59,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:40:59,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:40:59,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:40:59,791 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-23 21:41:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:41:00,170 INFO L93 Difference]: Finished difference Result 126 states and 153 transitions. [2023-11-23 21:41:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:41:00,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 45 [2023-11-23 21:41:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:41:00,174 INFO L225 Difference]: With dead ends: 126 [2023-11-23 21:41:00,175 INFO L226 Difference]: Without dead ends: 121 [2023-11-23 21:41:00,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:41:00,178 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:41:00,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 109 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:41:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-23 21:41:00,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2023-11-23 21:41:00,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 70 states have internal predecessors, (74), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-23 21:41:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2023-11-23 21:41:00,240 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 45 [2023-11-23 21:41:00,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:41:00,241 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2023-11-23 21:41:00,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-23 21:41:00,241 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2023-11-23 21:41:00,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 21:41:00,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:41:00,243 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:41:00,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:41:00,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:41:00,464 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:41:00,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:41:00,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1733391679, now seen corresponding path program 1 times [2023-11-23 21:41:00,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:41:00,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457526177] [2023-11-23 21:41:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:41:00,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:41:00,478 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:41:00,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084214625] [2023-11-23 21:41:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:41:00,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:41:00,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:41:00,480 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:41:00,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:41:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:41:00,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 21:41:00,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:41:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-23 21:41:01,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:41:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-23 21:41:01,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:41:01,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457526177] [2023-11-23 21:41:01,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:41:01,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084214625] [2023-11-23 21:41:01,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084214625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:41:01,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:41:01,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-11-23 21:41:01,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763242243] [2023-11-23 21:41:01,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:41:01,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:41:01,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:41:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:41:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:41:01,417 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-23 21:41:01,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:41:01,905 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2023-11-23 21:41:01,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:41:01,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 66 [2023-11-23 21:41:01,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:41:01,908 INFO L225 Difference]: With dead ends: 136 [2023-11-23 21:41:01,908 INFO L226 Difference]: Without dead ends: 132 [2023-11-23 21:41:01,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:41:01,909 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:41:01,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 152 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:41:01,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-23 21:41:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-23 21:41:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 75 states have (on average 1.08) internal successors, (81), 78 states have internal predecessors, (81), 37 states have call successors, (37), 20 states have call predecessors, (37), 19 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-23 21:41:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2023-11-23 21:41:01,970 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 66 [2023-11-23 21:41:01,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:41:01,971 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2023-11-23 21:41:01,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-23 21:41:01,971 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2023-11-23 21:41:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:41:01,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:41:01,973 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:41:02,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:41:02,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:41:02,182 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:41:02,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:41:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2124427812, now seen corresponding path program 1 times [2023-11-23 21:41:02,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:41:02,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907249957] [2023-11-23 21:41:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:41:02,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:41:02,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:41:02,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483445089] [2023-11-23 21:41:02,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:41:02,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:41:02,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:41:02,202 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:41:02,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:41:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:41:02,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 21:41:02,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:41:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-23 21:41:02,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:41:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-23 21:41:03,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:41:03,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907249957] [2023-11-23 21:41:03,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:41:03,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483445089] [2023-11-23 21:41:03,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483445089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:41:03,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:41:03,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-23 21:41:03,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105577486] [2023-11-23 21:41:03,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:41:03,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 21:41:03,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:41:03,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 21:41:03,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:41:03,054 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-11-23 21:41:03,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:41:03,652 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2023-11-23 21:41:03,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 21:41:03,652 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) Word has length 71 [2023-11-23 21:41:03,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:41:03,656 INFO L225 Difference]: With dead ends: 155 [2023-11-23 21:41:03,656 INFO L226 Difference]: Without dead ends: 144 [2023-11-23 21:41:03,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:41:03,657 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:41:03,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 151 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:41:03,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-23 21:41:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2023-11-23 21:41:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 77 states have (on average 1.077922077922078) internal successors, (83), 81 states have internal predecessors, (83), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-23 21:41:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2023-11-23 21:41:03,741 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 71 [2023-11-23 21:41:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:41:03,742 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2023-11-23 21:41:03,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-11-23 21:41:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2023-11-23 21:41:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-23 21:41:03,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:41:03,745 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2023-11-23 21:41:03,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:41:03,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:41:03,963 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:41:03,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:41:03,963 INFO L85 PathProgramCache]: Analyzing trace with hash -331345392, now seen corresponding path program 3 times [2023-11-23 21:41:03,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:41:03,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149231940] [2023-11-23 21:41:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:41:03,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:41:03,981 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:41:03,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168200563] [2023-11-23 21:41:03,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:41:03,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:41:03,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:41:03,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:41:04,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:41:04,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:41:04,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:41:04,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-23 21:41:04,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:41:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-23 21:41:04,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:41:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-23 21:41:05,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:41:05,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149231940] [2023-11-23 21:41:05,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:41:05,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168200563] [2023-11-23 21:41:05,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168200563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:41:05,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:41:05,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-11-23 21:41:05,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448058850] [2023-11-23 21:41:05,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:41:05,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:41:05,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:41:05,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:41:05,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:41:05,092 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-23 21:41:08,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-23 21:41:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:41:09,429 INFO L93 Difference]: Finished difference Result 146 states and 170 transitions. [2023-11-23 21:41:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:41:09,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 78 [2023-11-23 21:41:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:41:09,431 INFO L225 Difference]: With dead ends: 146 [2023-11-23 21:41:09,432 INFO L226 Difference]: Without dead ends: 128 [2023-11-23 21:41:09,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:41:09,433 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 25 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:41:09,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 198 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 267 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-11-23 21:41:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-23 21:41:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-23 21:41:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 74 states have (on average 1.054054054054054) internal successors, (78), 77 states have internal predecessors, (78), 34 states have call successors, (34), 19 states have call predecessors, (34), 19 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:41:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 145 transitions. [2023-11-23 21:41:09,504 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 145 transitions. Word has length 78 [2023-11-23 21:41:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:41:09,505 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 145 transitions. [2023-11-23 21:41:09,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-23 21:41:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 145 transitions. [2023-11-23 21:41:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-23 21:41:09,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:41:09,508 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:41:09,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-23 21:41:09,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 21:41:09,714 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:41:09,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:41:09,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1753860344, now seen corresponding path program 2 times [2023-11-23 21:41:09,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:41:09,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033795933] [2023-11-23 21:41:09,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:41:09,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:41:09,732 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:41:09,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166057296] [2023-11-23 21:41:09,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:41:09,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:41:09,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:41:09,734 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:41:09,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:41:09,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:41:09,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:41:09,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:41:09,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:41:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-11-23 21:41:10,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:41:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-23 21:41:10,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:41:10,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033795933] [2023-11-23 21:41:10,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:41:10,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166057296] [2023-11-23 21:41:10,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166057296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:41:10,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:41:10,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-23 21:41:10,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451996481] [2023-11-23 21:41:10,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:41:10,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:41:10,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:41:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:41:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:41:10,195 INFO L87 Difference]: Start difference. First operand 128 states and 145 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2023-11-23 21:41:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:41:10,742 INFO L93 Difference]: Finished difference Result 361 states and 394 transitions. [2023-11-23 21:41:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 21:41:10,743 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) Word has length 124 [2023-11-23 21:41:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:41:10,746 INFO L225 Difference]: With dead ends: 361 [2023-11-23 21:41:10,746 INFO L226 Difference]: Without dead ends: 345 [2023-11-23 21:41:10,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:41:10,748 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 122 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:41:10,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 131 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:41:10,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-11-23 21:41:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 289. [2023-11-23 21:41:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 174 states have (on average 1.0574712643678161) internal successors, (184), 181 states have internal predecessors, (184), 68 states have call successors, (68), 47 states have call predecessors, (68), 46 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-23 21:41:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 317 transitions. [2023-11-23 21:41:10,892 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 317 transitions. Word has length 124 [2023-11-23 21:41:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:41:10,892 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 317 transitions. [2023-11-23 21:41:10,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2023-11-23 21:41:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 317 transitions. [2023-11-23 21:41:10,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-23 21:41:10,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:41:10,895 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:41:10,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:41:11,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 21:41:11,110 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:41:11,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:41:11,111 INFO L85 PathProgramCache]: Analyzing trace with hash 109149613, now seen corresponding path program 1 times [2023-11-23 21:41:11,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:41:11,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004341444] [2023-11-23 21:41:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:41:11,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:41:11,124 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:41:11,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651452395] [2023-11-23 21:41:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:41:11,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:41:11,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:41:11,132 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:41:11,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:41:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:41:11,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-23 21:41:11,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:41:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 45 proven. 115 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-11-23 21:41:11,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:41:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 45 proven. 115 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-11-23 21:41:14,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:41:14,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004341444] [2023-11-23 21:41:14,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:41:14,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651452395] [2023-11-23 21:41:14,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651452395] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:41:14,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:41:14,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-11-23 21:41:14,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584952197] [2023-11-23 21:41:14,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:41:14,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 21:41:14,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:41:14,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 21:41:14,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:41:14,611 INFO L87 Difference]: Start difference. First operand 289 states and 317 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 8 states have call predecessors, (46), 9 states have call successors, (46) [2023-11-23 21:41:17,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-23 21:41:19,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-23 21:41:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:41:19,290 INFO L93 Difference]: Finished difference Result 327 states and 347 transitions. [2023-11-23 21:41:19,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:41:19,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 8 states have call predecessors, (46), 9 states have call successors, (46) Word has length 132 [2023-11-23 21:41:19,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:41:19,297 INFO L225 Difference]: With dead ends: 327 [2023-11-23 21:41:19,297 INFO L226 Difference]: Without dead ends: 299 [2023-11-23 21:41:19,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:41:19,299 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 23 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 50 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:41:19,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 254 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 259 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-11-23 21:41:19,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-23 21:41:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2023-11-23 21:41:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 186 states have (on average 1.043010752688172) internal successors, (194), 192 states have internal predecessors, (194), 62 states have call successors, (62), 51 states have call predecessors, (62), 50 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-23 21:41:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 316 transitions. [2023-11-23 21:41:19,499 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 316 transitions. Word has length 132 [2023-11-23 21:41:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:41:19,500 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 316 transitions. [2023-11-23 21:41:19,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 8 states have call predecessors, (46), 9 states have call successors, (46) [2023-11-23 21:41:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 316 transitions. [2023-11-23 21:41:19,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-23 21:41:19,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:41:19,504 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:41:19,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:41:19,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 21:41:19,726 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:41:19,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:41:19,726 INFO L85 PathProgramCache]: Analyzing trace with hash 460751474, now seen corresponding path program 2 times [2023-11-23 21:41:19,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:41:19,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866813335] [2023-11-23 21:41:19,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:41:19,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:41:19,750 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:41:19,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545262879] [2023-11-23 21:41:19,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:41:19,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:41:19,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:41:19,752 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:41:19,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:41:19,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:41:19,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:41:19,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-23 21:41:19,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:41:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 113 proven. 99 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2023-11-23 21:41:20,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:41:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 113 proven. 51 refuted. 0 times theorem prover too weak. 1374 trivial. 0 not checked. [2023-11-23 21:41:20,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:41:20,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866813335] [2023-11-23 21:41:20,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:41:20,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545262879] [2023-11-23 21:41:20,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545262879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:41:20,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:41:20,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2023-11-23 21:41:20,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135444228] [2023-11-23 21:41:20,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:41:20,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 21:41:20,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:41:20,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 21:41:20,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:41:20,899 INFO L87 Difference]: Start difference. First operand 299 states and 316 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 10 states have call successors, (39) [2023-11-23 21:41:21,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:41:21,797 INFO L93 Difference]: Finished difference Result 312 states and 328 transitions. [2023-11-23 21:41:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 21:41:21,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 10 states have call successors, (39) Word has length 155 [2023-11-23 21:41:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:41:21,803 INFO L225 Difference]: With dead ends: 312 [2023-11-23 21:41:21,803 INFO L226 Difference]: Without dead ends: 280 [2023-11-23 21:41:21,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 290 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:41:21,804 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 25 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:41:21,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 373 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:41:21,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-23 21:41:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2023-11-23 21:41:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 179 states have internal predecessors, (180), 53 states have call successors, (53), 48 states have call predecessors, (53), 48 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 21:41:21,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 285 transitions. [2023-11-23 21:41:21,950 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 285 transitions. Word has length 155 [2023-11-23 21:41:21,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:41:21,951 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 285 transitions. [2023-11-23 21:41:21,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 10 states have call successors, (39) [2023-11-23 21:41:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 285 transitions. [2023-11-23 21:41:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-23 21:41:21,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:41:21,957 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:41:21,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:41:22,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 21:41:22,179 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:41:22,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:41:22,179 INFO L85 PathProgramCache]: Analyzing trace with hash -141720852, now seen corresponding path program 3 times [2023-11-23 21:41:22,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:41:22,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585491386] [2023-11-23 21:41:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:41:22,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:41:22,208 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:41:22,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374459108] [2023-11-23 21:41:22,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:41:22,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:41:22,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:41:22,210 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:41:22,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 21:41:22,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2023-11-23 21:41:22,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:41:22,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 21:41:22,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:41:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 300 proven. 4880 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2023-11-23 21:41:22,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:41:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 102 proven. 380 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-23 21:41:23,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:41:23,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585491386] [2023-11-23 21:41:23,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:41:23,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374459108] [2023-11-23 21:41:23,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374459108] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:41:23,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:41:23,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-11-23 21:41:23,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979587663] [2023-11-23 21:41:23,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:41:23,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 21:41:23,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:41:23,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 21:41:23,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-11-23 21:41:23,473 INFO L87 Difference]: Start difference. First operand 280 states and 285 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 21 states have call predecessors, (102), 21 states have call successors, (102) [2023-11-23 21:41:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:41:24,596 INFO L93 Difference]: Finished difference Result 629 states and 646 transitions. [2023-11-23 21:41:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-23 21:41:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 21 states have call predecessors, (102), 21 states have call successors, (102) Word has length 292 [2023-11-23 21:41:24,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:41:24,601 INFO L225 Difference]: With dead ends: 629 [2023-11-23 21:41:24,601 INFO L226 Difference]: Without dead ends: 616 [2023-11-23 21:41:24,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2023-11-23 21:41:24,603 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 173 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:41:24,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 170 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:41:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2023-11-23 21:41:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2023-11-23 21:41:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 394 states have (on average 1.0050761421319796) internal successors, (396), 395 states have internal predecessors, (396), 113 states have call successors, (113), 108 states have call predecessors, (113), 108 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-23 21:41:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 621 transitions. [2023-11-23 21:41:24,870 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 621 transitions. Word has length 292 [2023-11-23 21:41:24,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:41:24,871 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 621 transitions. [2023-11-23 21:41:24,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 21 states have call predecessors, (102), 21 states have call successors, (102) [2023-11-23 21:41:24,872 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 621 transitions. [2023-11-23 21:41:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2023-11-23 21:41:24,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:41:24,890 INFO L195 NwaCegarLoop]: trace histogram [112, 111, 111, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:41:24,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 21:41:25,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 21:41:25,104 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:41:25,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:41:25,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1785250124, now seen corresponding path program 4 times [2023-11-23 21:41:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:41:25,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535687391] [2023-11-23 21:41:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:41:25,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:41:25,140 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:41:25,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334632662] [2023-11-23 21:41:25,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:41:25,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:41:25,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:41:25,141 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:41:25,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 21:41:25,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:41:25,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:41:25,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-23 21:41:25,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:41:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 26534 backedges. 660 proven. 24992 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2023-11-23 21:41:26,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:41:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 26534 backedges. 222 proven. 1892 refuted. 0 times theorem prover too weak. 24420 trivial. 0 not checked. [2023-11-23 21:41:28,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:41:28,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535687391] [2023-11-23 21:41:28,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:41:28,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334632662] [2023-11-23 21:41:28,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334632662] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:41:28,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:41:28,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2023-11-23 21:41:28,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886509589] [2023-11-23 21:41:28,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:41:28,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-23 21:41:28,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:41:28,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-23 21:41:28,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2023-11-23 21:41:28,173 INFO L87 Difference]: Start difference. First operand 616 states and 621 transitions. Second operand has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (223), 24 states have call predecessors, (223), 24 states have return successors, (222), 45 states have call predecessors, (222), 45 states have call successors, (222) [2023-11-23 21:41:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:41:31,439 INFO L93 Difference]: Finished difference Result 1301 states and 1330 transitions. [2023-11-23 21:41:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-11-23 21:41:31,440 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (223), 24 states have call predecessors, (223), 24 states have return successors, (222), 45 states have call predecessors, (222), 45 states have call successors, (222) Word has length 628 [2023-11-23 21:41:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:41:31,448 INFO L225 Difference]: With dead ends: 1301 [2023-11-23 21:41:31,448 INFO L226 Difference]: Without dead ends: 1288 [2023-11-23 21:41:31,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1299 GetRequests, 1206 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2023-11-23 21:41:31,454 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 314 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:41:31,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 298 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:41:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2023-11-23 21:41:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1288. [2023-11-23 21:41:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 826 states have (on average 1.0024213075060533) internal successors, (828), 827 states have internal predecessors, (828), 233 states have call successors, (233), 228 states have call predecessors, (233), 228 states have return successors, (232), 232 states have call predecessors, (232), 232 states have call successors, (232) [2023-11-23 21:41:32,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1293 transitions. [2023-11-23 21:41:32,247 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1293 transitions. Word has length 628 [2023-11-23 21:41:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:41:32,249 INFO L495 AbstractCegarLoop]: Abstraction has 1288 states and 1293 transitions. [2023-11-23 21:41:32,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (223), 24 states have call predecessors, (223), 24 states have return successors, (222), 45 states have call predecessors, (222), 45 states have call successors, (222) [2023-11-23 21:41:32,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1293 transitions. [2023-11-23 21:41:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1301 [2023-11-23 21:41:32,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:41:32,274 INFO L195 NwaCegarLoop]: trace histogram [232, 231, 231, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:41:32,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 21:41:32,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 21:41:32,475 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:41:32,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:41:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash -997767612, now seen corresponding path program 5 times [2023-11-23 21:41:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:41:32,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077928752] [2023-11-23 21:41:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:41:32,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:41:32,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:41:32,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859472910] [2023-11-23 21:41:32,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 21:41:32,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:41:32,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:41:32,543 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:41:32,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6e45a7-3696-4edf-81f9-e3212f14eb85/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process