./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6fff6eb11b5ece9f2655331435003a1af77ee5ac869f244677acc531eb435a19 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:05:57,199 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:05:57,319 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:05:57,331 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:05:57,332 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:05:57,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:05:57,373 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:05:57,373 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:05:57,375 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:05:57,380 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:05:57,381 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:05:57,382 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:05:57,383 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:05:57,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:05:57,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:05:57,386 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:05:57,386 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:05:57,387 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:05:57,387 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:05:57,388 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:05:57,388 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:05:57,389 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:05:57,389 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:05:57,390 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:05:57,390 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:05:57,391 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:05:57,392 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:05:57,393 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:05:57,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:05:57,394 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:05:57,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:05:57,396 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:05:57,396 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:05:57,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:05:57,397 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:05:57,397 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:05:57,397 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:05:57,398 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:05:57,398 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:05:57,398 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_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fff6eb11b5ece9f2655331435003a1af77ee5ac869f244677acc531eb435a19 [2023-11-06 22:05:57,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:05:57,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:05:57,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:05:57,806 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:05:57,807 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:05:57,808 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i [2023-11-06 22:06:01,036 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:06:01,382 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:06:01,382 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i [2023-11-06 22:06:01,408 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/data/f5f7abb67/e96218fe575c4956b01dd3b7a160db28/FLAGe8004a71d [2023-11-06 22:06:01,427 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/data/f5f7abb67/e96218fe575c4956b01dd3b7a160db28 [2023-11-06 22:06:01,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:06:01,432 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:06:01,434 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:06:01,434 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:06:01,443 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:06:01,445 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:06:01" (1/1) ... [2023-11-06 22:06:01,446 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28bfdc89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:01, skipping insertion in model container [2023-11-06 22:06:01,446 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:06:01" (1/1) ... [2023-11-06 22:06:01,561 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:06:02,086 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_464739fa-2b3e-4109-8dd9-1d04b14407df/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i[33021,33034] [2023-11-06 22:06:02,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:06:02,339 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:06:02,382 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_464739fa-2b3e-4109-8dd9-1d04b14407df/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i[33021,33034] [2023-11-06 22:06:02,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:06:02,512 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:06:02,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:02 WrapperNode [2023-11-06 22:06:02,512 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:06:02,513 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:06:02,514 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:06:02,514 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:06:02,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:02" (1/1) ... [2023-11-06 22:06:02,564 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:02" (1/1) ... [2023-11-06 22:06:02,667 INFO L138 Inliner]: procedures = 177, calls = 400, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1657 [2023-11-06 22:06:02,667 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:06:02,668 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:06:02,668 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:06:02,669 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:06:02,680 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:02" (1/1) ... [2023-11-06 22:06:02,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:02" (1/1) ... [2023-11-06 22:06:02,700 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:02" (1/1) ... [2023-11-06 22:06:02,700 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:02" (1/1) ... [2023-11-06 22:06:02,768 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:02" (1/1) ... [2023-11-06 22:06:02,788 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:02" (1/1) ... [2023-11-06 22:06:02,794 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:02" (1/1) ... [2023-11-06 22:06:02,804 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:02" (1/1) ... [2023-11-06 22:06:02,819 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:06:02,820 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:06:02,820 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:06:02,820 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:06:02,821 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:02" (1/1) ... [2023-11-06 22:06:02,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:06:02,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:02,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:06:02,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:06:02,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:06:02,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:06:02,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:06:02,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:06:02,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-06 22:06:02,910 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-06 22:06:02,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:06:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:06:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:06:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:06:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:06:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:06:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:06:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:06:02,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:06:03,209 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:06:03,211 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:06:05,509 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:06:05,528 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:06:05,528 INFO L302 CfgBuilder]: Removed 69 assume(true) statements. [2023-11-06 22:06:05,532 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:06:05 BoogieIcfgContainer [2023-11-06 22:06:05,532 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:06:05,535 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:06:05,535 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:06:05,539 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:06:05,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:06:01" (1/3) ... [2023-11-06 22:06:05,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b08b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:06:05, skipping insertion in model container [2023-11-06 22:06:05,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:02" (2/3) ... [2023-11-06 22:06:05,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b08b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:06:05, skipping insertion in model container [2023-11-06 22:06:05,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:06:05" (3/3) ... [2023-11-06 22:06:05,546 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test4-2.i [2023-11-06 22:06:05,567 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:06:05,567 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:06:05,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:06:05,658 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@11e1e983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:06:05,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:06:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 415 states, 395 states have (on average 1.6886075949367088) internal successors, (667), 406 states have internal predecessors, (667), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-06 22:06:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 22:06:05,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:05,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:05,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:05,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:05,680 INFO L85 PathProgramCache]: Analyzing trace with hash 484806776, now seen corresponding path program 1 times [2023-11-06 22:06:05,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:05,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645112906] [2023-11-06 22:06:05,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:05,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:05,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:05,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645112906] [2023-11-06 22:06:05,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645112906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:05,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:05,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:06:05,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781684957] [2023-11-06 22:06:05,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:05,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:06:05,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:05,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:06:05,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:05,979 INFO L87 Difference]: Start difference. First operand has 415 states, 395 states have (on average 1.6886075949367088) internal successors, (667), 406 states have internal predecessors, (667), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-06 22:06:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:06,124 INFO L93 Difference]: Finished difference Result 1168 states and 1987 transitions. [2023-11-06 22:06:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:06:06,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2023-11-06 22:06:06,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:06,157 INFO L225 Difference]: With dead ends: 1168 [2023-11-06 22:06:06,157 INFO L226 Difference]: Without dead ends: 717 [2023-11-06 22:06:06,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:06,171 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 501 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:06,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 1235 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:06:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2023-11-06 22:06:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 378. [2023-11-06 22:06:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 359 states have (on average 1.5041782729805013) internal successors, (540), 369 states have internal predecessors, (540), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-06 22:06:06,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 572 transitions. [2023-11-06 22:06:06,273 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 572 transitions. Word has length 10 [2023-11-06 22:06:06,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:06,274 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 572 transitions. [2023-11-06 22:06:06,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-06 22:06:06,274 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 572 transitions. [2023-11-06 22:06:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-06 22:06:06,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:06,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:06,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:06:06,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:06,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:06,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1334480805, now seen corresponding path program 1 times [2023-11-06 22:06:06,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:06,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945743005] [2023-11-06 22:06:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:06,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:06,440 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:06,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877292510] [2023-11-06 22:06:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:06,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:06,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:06,449 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:06,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:06:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:06,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:06:06,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:07,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:07,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:07,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945743005] [2023-11-06 22:06:07,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:07,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877292510] [2023-11-06 22:06:07,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877292510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:07,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:07,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:06:07,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900043669] [2023-11-06 22:06:07,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:07,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:06:07,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:07,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:06:07,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:07,022 INFO L87 Difference]: Start difference. First operand 378 states and 572 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2023-11-06 22:06:07,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:07,156 INFO L93 Difference]: Finished difference Result 774 states and 1172 transitions. [2023-11-06 22:06:07,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:06:07,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 156 [2023-11-06 22:06:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:07,161 INFO L225 Difference]: With dead ends: 774 [2023-11-06 22:06:07,161 INFO L226 Difference]: Without dead ends: 399 [2023-11-06 22:06:07,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:07,164 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 9 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:07,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1087 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:07,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-11-06 22:06:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 398. [2023-11-06 22:06:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 379 states have (on average 1.4775725593667546) internal successors, (560), 389 states have internal predecessors, (560), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-06 22:06:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 592 transitions. [2023-11-06 22:06:07,213 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 592 transitions. Word has length 156 [2023-11-06 22:06:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:07,214 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 592 transitions. [2023-11-06 22:06:07,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2023-11-06 22:06:07,230 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 592 transitions. [2023-11-06 22:06:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-06 22:06:07,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:07,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:07,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:06:07,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:07,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:07,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:07,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1745091171, now seen corresponding path program 1 times [2023-11-06 22:06:07,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:07,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775497494] [2023-11-06 22:06:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:07,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:07,577 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:07,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102778895] [2023-11-06 22:06:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:07,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:07,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:07,580 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:07,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:06:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:08,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:06:08,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:08,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:08,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:08,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775497494] [2023-11-06 22:06:08,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:08,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102778895] [2023-11-06 22:06:08,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102778895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:08,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:08,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:06:08,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66955110] [2023-11-06 22:06:08,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:08,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:06:08,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:08,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:06:08,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:08,135 INFO L87 Difference]: Start difference. First operand 398 states and 592 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2023-11-06 22:06:08,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:08,250 INFO L93 Difference]: Finished difference Result 814 states and 1212 transitions. [2023-11-06 22:06:08,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:06:08,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 156 [2023-11-06 22:06:08,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:08,258 INFO L225 Difference]: With dead ends: 814 [2023-11-06 22:06:08,259 INFO L226 Difference]: Without dead ends: 419 [2023-11-06 22:06:08,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:08,264 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 9 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:08,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1087 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-06 22:06:08,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 418. [2023-11-06 22:06:08,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 399 states have (on average 1.4536340852130325) internal successors, (580), 409 states have internal predecessors, (580), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-06 22:06:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 612 transitions. [2023-11-06 22:06:08,299 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 612 transitions. Word has length 156 [2023-11-06 22:06:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:08,300 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 612 transitions. [2023-11-06 22:06:08,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2023-11-06 22:06:08,300 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 612 transitions. [2023-11-06 22:06:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-06 22:06:08,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:08,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:08,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:08,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:08,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:08,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:08,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1989176347, now seen corresponding path program 1 times [2023-11-06 22:06:08,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:08,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281753348] [2023-11-06 22:06:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:08,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:08,625 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:08,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910558916] [2023-11-06 22:06:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:08,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:08,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:08,627 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:08,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:06:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:09,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:06:09,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:09,221 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:09,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:09,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281753348] [2023-11-06 22:06:09,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:09,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910558916] [2023-11-06 22:06:09,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910558916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:09,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:09,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:06:09,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039822733] [2023-11-06 22:06:09,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:09,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:06:09,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:09,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:06:09,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:06:09,226 INFO L87 Difference]: Start difference. First operand 418 states and 612 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2023-11-06 22:06:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:09,342 INFO L93 Difference]: Finished difference Result 820 states and 1208 transitions. [2023-11-06 22:06:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:06:09,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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 156 [2023-11-06 22:06:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:09,350 INFO L225 Difference]: With dead ends: 820 [2023-11-06 22:06:09,350 INFO L226 Difference]: Without dead ends: 405 [2023-11-06 22:06:09,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:06:09,356 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 165 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:09,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1478 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-11-06 22:06:09,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 404. [2023-11-06 22:06:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 385 states have (on average 1.4519480519480519) internal successors, (559), 395 states have internal predecessors, (559), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-06 22:06:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 591 transitions. [2023-11-06 22:06:09,378 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 591 transitions. Word has length 156 [2023-11-06 22:06:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:09,379 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 591 transitions. [2023-11-06 22:06:09,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2023-11-06 22:06:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 591 transitions. [2023-11-06 22:06:09,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-06 22:06:09,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:09,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:09,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 22:06:09,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:09,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:09,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:09,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1833998157, now seen corresponding path program 1 times [2023-11-06 22:06:09,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:09,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824472618] [2023-11-06 22:06:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:09,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:09,682 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:09,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540559957] [2023-11-06 22:06:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:09,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:09,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:09,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:09,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:06:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:10,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:06:10,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:10,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:10,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:10,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824472618] [2023-11-06 22:06:10,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:10,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540559957] [2023-11-06 22:06:10,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540559957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:10,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:10,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:06:10,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531401565] [2023-11-06 22:06:10,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:10,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:06:10,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:06:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:06:10,231 INFO L87 Difference]: Start difference. First operand 404 states and 591 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2023-11-06 22:06:10,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:10,368 INFO L93 Difference]: Finished difference Result 792 states and 1166 transitions. [2023-11-06 22:06:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:06:10,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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 156 [2023-11-06 22:06:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:10,379 INFO L225 Difference]: With dead ends: 792 [2023-11-06 22:06:10,380 INFO L226 Difference]: Without dead ends: 391 [2023-11-06 22:06:10,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:06:10,382 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 165 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:10,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1457 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-06 22:06:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 390. [2023-11-06 22:06:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 371 states have (on average 1.4501347708894878) internal successors, (538), 381 states have internal predecessors, (538), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-06 22:06:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 570 transitions. [2023-11-06 22:06:10,399 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 570 transitions. Word has length 156 [2023-11-06 22:06:10,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:10,399 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 570 transitions. [2023-11-06 22:06:10,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2023-11-06 22:06:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 570 transitions. [2023-11-06 22:06:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-06 22:06:10,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:10,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:10,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:10,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:10,611 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:10,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:10,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1172320347, now seen corresponding path program 1 times [2023-11-06 22:06:10,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:10,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408377312] [2023-11-06 22:06:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:10,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:10,692 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:10,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497965339] [2023-11-06 22:06:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:10,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:10,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:10,694 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:10,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:06:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:11,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:06:11,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:11,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:11,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:11,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408377312] [2023-11-06 22:06:11,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:11,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497965339] [2023-11-06 22:06:11,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497965339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:11,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:06:11,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-06 22:06:11,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112877456] [2023-11-06 22:06:11,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:11,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:06:11,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:11,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:06:11,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:06:11,739 INFO L87 Difference]: Start difference. First operand 390 states and 570 transitions. Second operand has 6 states, 6 states have (on average 50.5) internal successors, (303), 6 states have internal predecessors, (303), 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) [2023-11-06 22:06:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:11,906 INFO L93 Difference]: Finished difference Result 1477 states and 2159 transitions. [2023-11-06 22:06:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:06:11,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 50.5) internal successors, (303), 6 states have internal predecessors, (303), 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 156 [2023-11-06 22:06:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:11,917 INFO L225 Difference]: With dead ends: 1477 [2023-11-06 22:06:11,917 INFO L226 Difference]: Without dead ends: 1446 [2023-11-06 22:06:11,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:06:11,919 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 2000 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2024 SdHoareTripleChecker+Valid, 2322 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:11,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2024 Valid, 2322 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2023-11-06 22:06:11,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1446. [2023-11-06 22:06:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1409 states have (on average 1.446415897799858) internal successors, (2038), 1419 states have internal predecessors, (2038), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-06 22:06:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 2106 transitions. [2023-11-06 22:06:12,004 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 2106 transitions. Word has length 156 [2023-11-06 22:06:12,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:12,004 INFO L495 AbstractCegarLoop]: Abstraction has 1446 states and 2106 transitions. [2023-11-06 22:06:12,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 50.5) internal successors, (303), 6 states have internal predecessors, (303), 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) [2023-11-06 22:06:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 2106 transitions. [2023-11-06 22:06:12,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-11-06 22:06:12,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:12,021 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:12,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:12,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:06:12,233 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:12,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:12,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2107850628, now seen corresponding path program 2 times [2023-11-06 22:06:12,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:12,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014759163] [2023-11-06 22:06:12,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:12,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:12,515 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:12,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844074508] [2023-11-06 22:06:12,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:06:12,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:12,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:12,518 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:12,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:06:13,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:06:13,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:13,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:06:13,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2023-11-06 22:06:15,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:15,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:15,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014759163] [2023-11-06 22:06:15,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:15,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844074508] [2023-11-06 22:06:15,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844074508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:15,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:15,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:06:15,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914311303] [2023-11-06 22:06:15,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:15,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:06:15,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:15,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:06:15,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:06:15,732 INFO L87 Difference]: Start difference. First operand 1446 states and 2106 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2023-11-06 22:06:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:16,214 INFO L93 Difference]: Finished difference Result 2587 states and 3765 transitions. [2023-11-06 22:06:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:06:16,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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 594 [2023-11-06 22:06:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:16,224 INFO L225 Difference]: With dead ends: 2587 [2023-11-06 22:06:16,224 INFO L226 Difference]: Without dead ends: 1444 [2023-11-06 22:06:16,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:06:16,228 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 294 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:16,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 1590 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:06:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2023-11-06 22:06:16,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1444. [2023-11-06 22:06:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1407 states have (on average 1.4463397299218195) internal successors, (2035), 1417 states have internal predecessors, (2035), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-06 22:06:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2103 transitions. [2023-11-06 22:06:16,282 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2103 transitions. Word has length 594 [2023-11-06 22:06:16,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:16,282 INFO L495 AbstractCegarLoop]: Abstraction has 1444 states and 2103 transitions. [2023-11-06 22:06:16,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2023-11-06 22:06:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2103 transitions. [2023-11-06 22:06:16,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2023-11-06 22:06:16,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:16,301 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:16,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:16,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:06:16,517 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:16,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:16,517 INFO L85 PathProgramCache]: Analyzing trace with hash -664242175, now seen corresponding path program 1 times [2023-11-06 22:06:16,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:16,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072473319] [2023-11-06 22:06:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:16,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:16,814 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:16,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803682497] [2023-11-06 22:06:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:16,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:16,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:16,818 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:16,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:06:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:18,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 2913 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:06:18,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:06:19,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:06:20,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:20,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072473319] [2023-11-06 22:06:20,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:20,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803682497] [2023-11-06 22:06:20,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803682497] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:20,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:06:20,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-06 22:06:20,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77715409] [2023-11-06 22:06:20,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:20,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:06:20,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:20,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:06:20,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:06:20,142 INFO L87 Difference]: Start difference. First operand 1444 states and 2103 transitions. Second operand has 12 states, 12 states have (on average 99.33333333333333) internal successors, (1192), 12 states have internal predecessors, (1192), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:06:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:20,647 INFO L93 Difference]: Finished difference Result 3587 states and 5231 transitions. [2023-11-06 22:06:20,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:06:20,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 99.33333333333333) internal successors, (1192), 12 states have internal predecessors, (1192), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 609 [2023-11-06 22:06:20,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:20,673 INFO L225 Difference]: With dead ends: 3587 [2023-11-06 22:06:20,674 INFO L226 Difference]: Without dead ends: 3556 [2023-11-06 22:06:20,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1216 GetRequests, 1206 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:06:20,677 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 6636 mSDsluCounter, 4958 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6692 SdHoareTripleChecker+Valid, 5592 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:20,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6692 Valid, 5592 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:06:20,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2023-11-06 22:06:20,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 3556. [2023-11-06 22:06:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3483 states have (on average 1.4455928797014068) internal successors, (5035), 3493 states have internal predecessors, (5035), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 61 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-06 22:06:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 5175 transitions. [2023-11-06 22:06:20,853 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 5175 transitions. Word has length 609 [2023-11-06 22:06:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:20,854 INFO L495 AbstractCegarLoop]: Abstraction has 3556 states and 5175 transitions. [2023-11-06 22:06:20,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 99.33333333333333) internal successors, (1192), 12 states have internal predecessors, (1192), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:06:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 5175 transitions. [2023-11-06 22:06:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1486 [2023-11-06 22:06:20,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:20,943 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:20,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 22:06:21,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:21,157 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:21,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:21,158 INFO L85 PathProgramCache]: Analyzing trace with hash 549813395, now seen corresponding path program 2 times [2023-11-06 22:06:21,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:21,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543345135] [2023-11-06 22:06:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:21,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:21,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:21,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030911061] [2023-11-06 22:06:21,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:06:21,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:21,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:21,874 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:21,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:06:24,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:06:24,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:24,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 6969 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:06:24,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6566 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 6070 trivial. 0 not checked. [2023-11-06 22:06:25,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:25,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:25,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543345135] [2023-11-06 22:06:25,174 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:25,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030911061] [2023-11-06 22:06:25,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030911061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:25,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:25,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:06:25,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153291102] [2023-11-06 22:06:25,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:25,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:06:25,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:25,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:06:25,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:25,179 INFO L87 Difference]: Start difference. First operand 3556 states and 5175 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:06:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:25,359 INFO L93 Difference]: Finished difference Result 6981 states and 10157 transitions. [2023-11-06 22:06:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:06:25,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 1 states have call successors, (3), 1 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 1485 [2023-11-06 22:06:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:25,383 INFO L225 Difference]: With dead ends: 6981 [2023-11-06 22:06:25,383 INFO L226 Difference]: Without dead ends: 3554 [2023-11-06 22:06:25,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1484 GetRequests, 1483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:25,392 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 123 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:25,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1097 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2023-11-06 22:06:25,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 3554. [2023-11-06 22:06:25,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 3481 states have (on average 1.4455616202240735) internal successors, (5032), 3491 states have internal predecessors, (5032), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 61 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-06 22:06:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 5172 transitions. [2023-11-06 22:06:25,534 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 5172 transitions. Word has length 1485 [2023-11-06 22:06:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:25,535 INFO L495 AbstractCegarLoop]: Abstraction has 3554 states and 5172 transitions. [2023-11-06 22:06:25,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:06:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 5172 transitions. [2023-11-06 22:06:25,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1501 [2023-11-06 22:06:25,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:25,564 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:25,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:25,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:25,780 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:25,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:25,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1805279756, now seen corresponding path program 1 times [2023-11-06 22:06:25,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:25,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510761691] [2023-11-06 22:06:25,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:25,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:26,546 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:26,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123941646] [2023-11-06 22:06:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:26,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:26,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:26,549 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:26,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_464739fa-2b3e-4109-8dd9-1d04b14407df/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process