./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/egcd3-ll.c --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_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/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_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/egcd3-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/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_d697210f-4693-42cb-9967-d13a4140a000/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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:18:18,337 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:18:18,452 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:18:18,460 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:18:18,460 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:18:18,501 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:18:18,502 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:18:18,503 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:18:18,504 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:18:18,509 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:18:18,510 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:18:18,510 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:18:18,511 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:18:18,513 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:18:18,513 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:18:18,513 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:18:18,514 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:18:18,514 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:18:18,515 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:18:18,515 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:18:18,515 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:18:18,516 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:18:18,516 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:18:18,517 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:18:18,517 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:18:18,518 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:18:18,519 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:18:18,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:18:18,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:18:18,520 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:18:18,521 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:18:18,522 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:18:18,522 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:18:18,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:18:18,522 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:18:18,523 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:18:18,523 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:18:18,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:18:18,523 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:18:18,523 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_d697210f-4693-42cb-9967-d13a4140a000/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2023-11-06 22:18:18,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:18:18,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:18:18,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:18:18,887 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:18:18,888 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:18:18,893 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2023-11-06 22:18:21,861 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:18:22,095 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:18:22,096 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2023-11-06 22:18:22,104 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/data/d02952a1b/83935696a6df45ae9c011b418687c444/FLAG0c3912bcd [2023-11-06 22:18:22,119 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/data/d02952a1b/83935696a6df45ae9c011b418687c444 [2023-11-06 22:18:22,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:18:22,124 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:18:22,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:18:22,126 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:18:22,131 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:18:22,132 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,133 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3916ed3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22, skipping insertion in model container [2023-11-06 22:18:22,133 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,157 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:18:22,353 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_d697210f-4693-42cb-9967-d13a4140a000/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2023-11-06 22:18:22,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:18:22,396 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:18:22,412 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_d697210f-4693-42cb-9967-d13a4140a000/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2023-11-06 22:18:22,430 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:18:22,446 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:18:22,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22 WrapperNode [2023-11-06 22:18:22,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:18:22,448 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:18:22,448 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:18:22,448 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:18:22,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,470 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,490 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2023-11-06 22:18:22,491 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:18:22,492 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:18:22,492 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:18:22,492 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:18:22,501 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,503 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,503 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,507 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,511 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,512 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,513 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,519 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:18:22,520 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:18:22,520 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:18:22,520 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:18:22,521 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (1/1) ... [2023-11-06 22:18:22,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:18:22,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:22,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:18:22,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:18:22,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:18:22,611 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:18:22,611 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:18:22,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:18:22,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:18:22,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:18:22,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:18:22,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:18:22,700 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:18:22,702 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:18:22,941 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:18:22,952 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:18:22,952 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:18:22,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:22 BoogieIcfgContainer [2023-11-06 22:18:22,956 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:18:22,959 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:18:22,960 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:18:22,963 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:18:22,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:18:22" (1/3) ... [2023-11-06 22:18:22,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eeb1bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:22, skipping insertion in model container [2023-11-06 22:18:22,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:22" (2/3) ... [2023-11-06 22:18:22,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eeb1bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:22, skipping insertion in model container [2023-11-06 22:18:22,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:22" (3/3) ... [2023-11-06 22:18:22,966 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2023-11-06 22:18:22,986 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:18:22,986 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:18:23,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:18:23,057 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;@713b3f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:18:23,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:18:23,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:18:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:18:23,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:23,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:23,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:23,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:23,078 INFO L85 PathProgramCache]: Analyzing trace with hash -149497031, now seen corresponding path program 1 times [2023-11-06 22:18:23,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:23,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121876304] [2023-11-06 22:18:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:23,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:23,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:23,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121876304] [2023-11-06 22:18:23,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:18:23,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640205865] [2023-11-06 22:18:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:23,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:23,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:23,215 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:23,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:18:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:23,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:18:23,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:18:23,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:23,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640205865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:23,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:23,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:18:23,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664040101] [2023-11-06 22:18:23,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:23,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:18:23,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:23,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:18:23,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:18:23,433 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:18:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:23,459 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2023-11-06 22:18:23,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:18:23,462 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-06 22:18:23,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:23,468 INFO L225 Difference]: With dead ends: 61 [2023-11-06 22:18:23,468 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 22:18:23,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:18:23,475 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:23,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:18:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 22:18:23,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-06 22:18:23,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 22:18:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-11-06 22:18:23,526 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2023-11-06 22:18:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:23,527 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-11-06 22:18:23,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:18:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-06 22:18:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:18:23,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:23,529 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:23,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:23,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:18:23,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:23,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:23,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2030119444, now seen corresponding path program 1 times [2023-11-06 22:18:23,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:23,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707311658] [2023-11-06 22:18:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:23,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:23,760 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:23,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127442556] [2023-11-06 22:18:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:23,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:23,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:23,762 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:23,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:18:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:23,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:18:23,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:23,950 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:23,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:23,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707311658] [2023-11-06 22:18:23,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:23,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127442556] [2023-11-06 22:18:23,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127442556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:23,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:23,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:18:23,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340575845] [2023-11-06 22:18:23,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:23,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:18:23,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:23,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:18:23,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:18:23,956 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:18:24,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:24,077 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2023-11-06 22:18:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:18:24,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-11-06 22:18:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:24,080 INFO L225 Difference]: With dead ends: 47 [2023-11-06 22:18:24,081 INFO L226 Difference]: Without dead ends: 40 [2023-11-06 22:18:24,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:18:24,084 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:24,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 113 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:18:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-06 22:18:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2023-11-06 22:18:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 22:18:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-11-06 22:18:24,103 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2023-11-06 22:18:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:24,104 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-11-06 22:18:24,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:18:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-11-06 22:18:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 22:18:24,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:24,107 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:24,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:24,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:24,312 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:24,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:24,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1778657237, now seen corresponding path program 1 times [2023-11-06 22:18:24,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:24,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391510601] [2023-11-06 22:18:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:24,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:24,344 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:24,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753318981] [2023-11-06 22:18:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:24,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:24,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:24,347 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:24,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:18:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:24,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:18:24,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:24,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:24,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:24,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391510601] [2023-11-06 22:18:24,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:24,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753318981] [2023-11-06 22:18:24,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753318981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:24,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:24,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 22:18:24,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124854083] [2023-11-06 22:18:24,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:24,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:18:24,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:24,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:18:24,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:18:24,731 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:18:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:24,877 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-11-06 22:18:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:18:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-11-06 22:18:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:24,879 INFO L225 Difference]: With dead ends: 46 [2023-11-06 22:18:24,879 INFO L226 Difference]: Without dead ends: 44 [2023-11-06 22:18:24,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:18:24,881 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:24,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 139 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:18:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-06 22:18:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-11-06 22:18:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 22:18:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2023-11-06 22:18:24,896 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2023-11-06 22:18:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:24,897 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2023-11-06 22:18:24,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:18:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2023-11-06 22:18:24,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 22:18:24,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:24,898 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:24,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 22:18:25,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:25,104 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:25,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash 646289443, now seen corresponding path program 1 times [2023-11-06 22:18:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:25,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530365324] [2023-11-06 22:18:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:25,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:25,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:25,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993562804] [2023-11-06 22:18:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:25,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:25,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:25,134 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:25,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:18:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:25,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:18:25,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:25,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:25,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:25,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530365324] [2023-11-06 22:18:25,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:25,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993562804] [2023-11-06 22:18:25,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993562804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:25,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:25,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-11-06 22:18:25,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040213081] [2023-11-06 22:18:25,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:25,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:18:25,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:25,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:18:25,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:18:25,353 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:18:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:25,575 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2023-11-06 22:18:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:18:25,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-11-06 22:18:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:25,578 INFO L225 Difference]: With dead ends: 96 [2023-11-06 22:18:25,578 INFO L226 Difference]: Without dead ends: 89 [2023-11-06 22:18:25,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:18:25,580 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 62 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:25,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 217 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:18:25,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-06 22:18:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2023-11-06 22:18:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-06 22:18:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2023-11-06 22:18:25,605 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 24 [2023-11-06 22:18:25,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:25,605 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2023-11-06 22:18:25,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:18:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2023-11-06 22:18:25,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 22:18:25,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:25,607 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:25,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:25,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:25,819 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:25,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1194834104, now seen corresponding path program 1 times [2023-11-06 22:18:25,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:25,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730796673] [2023-11-06 22:18:25,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:25,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:25,833 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:25,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116204792] [2023-11-06 22:18:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:25,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:25,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:25,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:25,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:18:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:25,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:18:25,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:26,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:26,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:26,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730796673] [2023-11-06 22:18:26,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:26,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116204792] [2023-11-06 22:18:26,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116204792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:26,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:18:26,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-06 22:18:26,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248507214] [2023-11-06 22:18:26,515 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:26,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:18:26,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:18:26,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:18:26,517 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:18:26,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:26,855 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2023-11-06 22:18:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:18:26,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-11-06 22:18:26,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:26,858 INFO L225 Difference]: With dead ends: 79 [2023-11-06 22:18:26,859 INFO L226 Difference]: Without dead ends: 77 [2023-11-06 22:18:26,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:18:26,861 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:26,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 181 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:18:26,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-06 22:18:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2023-11-06 22:18:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-06 22:18:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2023-11-06 22:18:26,904 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 27 [2023-11-06 22:18:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:26,905 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2023-11-06 22:18:26,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:18:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2023-11-06 22:18:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 22:18:26,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:26,906 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:26,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:27,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:27,112 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:27,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1392040386, now seen corresponding path program 1 times [2023-11-06 22:18:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:27,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766636718] [2023-11-06 22:18:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:27,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:27,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007392176] [2023-11-06 22:18:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:27,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:27,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:27,128 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:27,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:18:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:27,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:18:27,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:27,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:18:27,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:27,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766636718] [2023-11-06 22:18:27,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:27,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007392176] [2023-11-06 22:18:27,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007392176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:27,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:27,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-11-06 22:18:27,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546958564] [2023-11-06 22:18:27,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:27,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:18:27,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:27,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:18:27,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:18:27,603 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:18:27,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:27,952 INFO L93 Difference]: Finished difference Result 111 states and 150 transitions. [2023-11-06 22:18:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:18:27,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2023-11-06 22:18:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:27,954 INFO L225 Difference]: With dead ends: 111 [2023-11-06 22:18:27,954 INFO L226 Difference]: Without dead ends: 109 [2023-11-06 22:18:27,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:18:27,956 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 65 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:27,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 281 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:18:27,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-06 22:18:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2023-11-06 22:18:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-06 22:18:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2023-11-06 22:18:27,984 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 27 [2023-11-06 22:18:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:27,984 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2023-11-06 22:18:27,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:18:27,985 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2023-11-06 22:18:27,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:18:27,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:27,986 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:27,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:28,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:18:28,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:28,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:28,192 INFO L85 PathProgramCache]: Analyzing trace with hash -281586315, now seen corresponding path program 1 times [2023-11-06 22:18:28,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:28,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548020060] [2023-11-06 22:18:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:28,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:28,204 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:28,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074937071] [2023-11-06 22:18:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:28,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:28,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:28,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:28,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:18:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:28,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:18:28,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 22:18:28,365 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:28,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:28,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548020060] [2023-11-06 22:18:28,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:28,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074937071] [2023-11-06 22:18:28,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074937071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:28,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:28,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 22:18:28,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35979270] [2023-11-06 22:18:28,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:28,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:18:28,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:28,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:18:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:18:28,368 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:18:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:28,527 INFO L93 Difference]: Finished difference Result 111 states and 149 transitions. [2023-11-06 22:18:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:18:28,528 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-11-06 22:18:28,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:28,529 INFO L225 Difference]: With dead ends: 111 [2023-11-06 22:18:28,529 INFO L226 Difference]: Without dead ends: 109 [2023-11-06 22:18:28,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:18:28,531 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:28,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 146 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:18:28,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-06 22:18:28,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2023-11-06 22:18:28,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 75 states have internal predecessors, (93), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-06 22:18:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 146 transitions. [2023-11-06 22:18:28,585 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 146 transitions. Word has length 32 [2023-11-06 22:18:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:28,586 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 146 transitions. [2023-11-06 22:18:28,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:18:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 146 transitions. [2023-11-06 22:18:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:18:28,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:28,588 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:28,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:28,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:18:28,794 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:28,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:28,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278097, now seen corresponding path program 1 times [2023-11-06 22:18:28,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:28,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567123713] [2023-11-06 22:18:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:28,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:28,806 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:28,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888203213] [2023-11-06 22:18:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:28,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:28,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:28,808 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:28,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:18:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:28,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:18:28,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:29,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:18:29,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:29,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567123713] [2023-11-06 22:18:29,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:29,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888203213] [2023-11-06 22:18:29,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888203213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:29,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:29,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2023-11-06 22:18:29,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666743139] [2023-11-06 22:18:29,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:29,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:18:29,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:29,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:18:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:18:29,628 INFO L87 Difference]: Start difference. First operand 108 states and 146 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 22:18:34,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:34,141 INFO L93 Difference]: Finished difference Result 155 states and 209 transitions. [2023-11-06 22:18:34,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:18:34,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2023-11-06 22:18:34,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:34,145 INFO L225 Difference]: With dead ends: 155 [2023-11-06 22:18:34,146 INFO L226 Difference]: Without dead ends: 153 [2023-11-06 22:18:34,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:18:34,148 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 172 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:34,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 296 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 22:18:34,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-06 22:18:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 138. [2023-11-06 22:18:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 97 states have (on average 1.2474226804123711) internal successors, (121), 101 states have internal predecessors, (121), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-06 22:18:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 186 transitions. [2023-11-06 22:18:34,226 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 186 transitions. Word has length 32 [2023-11-06 22:18:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:34,226 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 186 transitions. [2023-11-06 22:18:34,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 22:18:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 186 transitions. [2023-11-06 22:18:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:18:34,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:34,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:34,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:34,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:34,436 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:34,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash 492814709, now seen corresponding path program 2 times [2023-11-06 22:18:34,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:34,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289886220] [2023-11-06 22:18:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:34,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:34,462 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:34,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867358454] [2023-11-06 22:18:34,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:34,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:34,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:34,467 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:34,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:18:34,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:34,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:34,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:18:34,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:18:34,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:34,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:34,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289886220] [2023-11-06 22:18:34,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:34,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867358454] [2023-11-06 22:18:34,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867358454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:34,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:34,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:34,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719120980] [2023-11-06 22:18:34,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:34,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:34,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:34,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:34,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:34,560 INFO L87 Difference]: Start difference. First operand 138 states and 186 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:18:34,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:34,686 INFO L93 Difference]: Finished difference Result 192 states and 265 transitions. [2023-11-06 22:18:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:18:34,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-11-06 22:18:34,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:34,688 INFO L225 Difference]: With dead ends: 192 [2023-11-06 22:18:34,689 INFO L226 Difference]: Without dead ends: 129 [2023-11-06 22:18:34,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:18:34,691 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 19 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:34,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 140 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:18:34,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-06 22:18:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2023-11-06 22:18:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 66 states have internal predecessors, (74), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-06 22:18:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2023-11-06 22:18:34,732 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 32 [2023-11-06 22:18:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:34,732 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2023-11-06 22:18:34,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:18:34,733 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2023-11-06 22:18:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 22:18:34,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:34,734 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-06 22:18:34,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:34,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:34,940 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:34,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:34,940 INFO L85 PathProgramCache]: Analyzing trace with hash -449167720, now seen corresponding path program 1 times [2023-11-06 22:18:34,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:34,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135456883] [2023-11-06 22:18:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:34,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:34,950 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:34,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826962980] [2023-11-06 22:18:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:34,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:34,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:34,952 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:34,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:18:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:35,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:18:35,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 22:18:35,069 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:35,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:35,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135456883] [2023-11-06 22:18:35,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:35,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826962980] [2023-11-06 22:18:35,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826962980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:35,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:35,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:18:35,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657610426] [2023-11-06 22:18:35,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:35,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:18:35,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:35,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:18:35,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:18:35,073 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:18:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:35,217 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2023-11-06 22:18:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:18:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2023-11-06 22:18:35,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:35,221 INFO L225 Difference]: With dead ends: 127 [2023-11-06 22:18:35,221 INFO L226 Difference]: Without dead ends: 125 [2023-11-06 22:18:35,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:18:35,222 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:35,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 149 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:18:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-06 22:18:35,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2023-11-06 22:18:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 77 states have internal predecessors, (81), 39 states have call successors, (39), 8 states have call predecessors, (39), 8 states have return successors, (38), 32 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-06 22:18:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 158 transitions. [2023-11-06 22:18:35,296 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 158 transitions. Word has length 37 [2023-11-06 22:18:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:35,296 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 158 transitions. [2023-11-06 22:18:35,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:18:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 158 transitions. [2023-11-06 22:18:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 22:18:35,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:35,299 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:35,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:35,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:35,505 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:35,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:35,505 INFO L85 PathProgramCache]: Analyzing trace with hash -756931426, now seen corresponding path program 1 times [2023-11-06 22:18:35,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:35,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423692044] [2023-11-06 22:18:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:35,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:35,515 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:35,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241339499] [2023-11-06 22:18:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:35,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:35,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:35,516 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:35,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:18:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:35,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:18:35,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:18:35,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:18:36,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:36,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423692044] [2023-11-06 22:18:36,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:36,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241339499] [2023-11-06 22:18:36,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241339499] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:36,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:18:36,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 16 [2023-11-06 22:18:36,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441484323] [2023-11-06 22:18:36,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:36,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:36,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:36,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:36,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:18:36,043 INFO L87 Difference]: Start difference. First operand 118 states and 158 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 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 22:18:36,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:36,180 INFO L93 Difference]: Finished difference Result 146 states and 201 transitions. [2023-11-06 22:18:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:18:36,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 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 37 [2023-11-06 22:18:36,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:36,186 INFO L225 Difference]: With dead ends: 146 [2023-11-06 22:18:36,186 INFO L226 Difference]: Without dead ends: 144 [2023-11-06 22:18:36,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:18:36,188 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:36,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 101 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:18:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-06 22:18:36,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2023-11-06 22:18:36,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 86 states have internal predecessors, (91), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-06 22:18:36,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 196 transitions. [2023-11-06 22:18:36,290 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 196 transitions. Word has length 37 [2023-11-06 22:18:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:36,290 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 196 transitions. [2023-11-06 22:18:36,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 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 22:18:36,291 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 196 transitions. [2023-11-06 22:18:36,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 22:18:36,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:36,293 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:36,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:36,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:36,498 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:36,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:36,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1289603446, now seen corresponding path program 1 times [2023-11-06 22:18:36,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:36,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425868701] [2023-11-06 22:18:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:36,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:36,510 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:36,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514283377] [2023-11-06 22:18:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:36,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:36,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:36,512 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:36,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:18:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:36,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 22:18:36,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 22:18:37,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-06 22:18:38,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:38,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425868701] [2023-11-06 22:18:38,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:38,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514283377] [2023-11-06 22:18:38,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514283377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:38,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:38,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-11-06 22:18:38,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347837636] [2023-11-06 22:18:38,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:38,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:18:38,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:38,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:18:38,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:18:38,322 INFO L87 Difference]: Start difference. First operand 141 states and 196 transitions. Second operand has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-06 22:18:48,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:48,513 INFO L93 Difference]: Finished difference Result 377 states and 542 transitions. [2023-11-06 22:18:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 22:18:48,515 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 49 [2023-11-06 22:18:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:48,517 INFO L225 Difference]: With dead ends: 377 [2023-11-06 22:18:48,517 INFO L226 Difference]: Without dead ends: 270 [2023-11-06 22:18:48,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=474, Invalid=2282, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 22:18:48,521 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 174 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:48,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 314 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-06 22:18:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-11-06 22:18:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 225. [2023-11-06 22:18:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 138 states have (on average 1.181159420289855) internal successors, (163), 145 states have internal predecessors, (163), 73 states have call successors, (73), 13 states have call predecessors, (73), 13 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-06 22:18:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 308 transitions. [2023-11-06 22:18:48,703 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 308 transitions. Word has length 49 [2023-11-06 22:18:48,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:48,704 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 308 transitions. [2023-11-06 22:18:48,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-06 22:18:48,704 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 308 transitions. [2023-11-06 22:18:48,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 22:18:48,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:48,706 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:48,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:48,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:48,916 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:48,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:48,917 INFO L85 PathProgramCache]: Analyzing trace with hash 982010905, now seen corresponding path program 1 times [2023-11-06 22:18:48,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:48,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794314589] [2023-11-06 22:18:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:48,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:48,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:48,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692261484] [2023-11-06 22:18:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:48,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:48,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:48,939 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:48,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:18:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:48,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:18:48,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-06 22:18:49,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-06 22:18:49,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:49,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794314589] [2023-11-06 22:18:49,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:49,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692261484] [2023-11-06 22:18:49,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692261484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:49,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:49,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 16 [2023-11-06 22:18:49,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175285181] [2023-11-06 22:18:49,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:49,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:18:49,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:18:49,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:18:49,294 INFO L87 Difference]: Start difference. First operand 225 states and 308 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-06 22:18:49,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:49,758 INFO L93 Difference]: Finished difference Result 247 states and 340 transitions. [2023-11-06 22:18:49,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:18:49,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 59 [2023-11-06 22:18:49,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:49,761 INFO L225 Difference]: With dead ends: 247 [2023-11-06 22:18:49,761 INFO L226 Difference]: Without dead ends: 245 [2023-11-06 22:18:49,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:18:49,762 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:49,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 176 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:18:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-11-06 22:18:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 229. [2023-11-06 22:18:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 141 states have (on average 1.177304964539007) internal successors, (166), 148 states have internal predecessors, (166), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-06 22:18:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 311 transitions. [2023-11-06 22:18:49,922 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 311 transitions. Word has length 59 [2023-11-06 22:18:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:49,922 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 311 transitions. [2023-11-06 22:18:49,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-06 22:18:49,922 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 311 transitions. [2023-11-06 22:18:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 22:18:49,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:49,923 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:49,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:50,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:50,129 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:50,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash -70799180, now seen corresponding path program 1 times [2023-11-06 22:18:50,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:50,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823682667] [2023-11-06 22:18:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:50,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:50,139 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:50,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986893377] [2023-11-06 22:18:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:50,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:50,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:50,140 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:50,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:18:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:50,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:18:50,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 22:18:51,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-06 22:18:51,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:51,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823682667] [2023-11-06 22:18:51,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:51,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986893377] [2023-11-06 22:18:51,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986893377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:51,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:51,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-11-06 22:18:51,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498014475] [2023-11-06 22:18:51,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:51,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:18:51,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:51,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:18:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:18:51,701 INFO L87 Difference]: Start difference. First operand 229 states and 311 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-06 22:19:13,444 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse0 (+ .cse1 .cse2)) (.cse3 (+ |c_ULTIMATE.start_main_~b~0#1| 1))) (and (<= .cse0 |c_ULTIMATE.start_main_~x~0#1|) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~x~0#1|) (<= 2 .cse0) (= .cse0 |c_ULTIMATE.start_main_~a~0#1|) (<= 2 |c_ULTIMATE.start_main_~b~0#1|) (<= 1 |c_ULTIMATE.start_main_~x~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) |c_ULTIMATE.start_main_~b~0#1|) (<= (+ .cse1 .cse2 1) |c_ULTIMATE.start_main_~y~0#1|) (<= .cse3 |c_ULTIMATE.start_main_~y~0#1|) (<= .cse3 |c_ULTIMATE.start_main_~a~0#1|)))) is different from false [2023-11-06 22:19:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:19:26,795 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2023-11-06 22:19:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 22:19:26,796 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 57 [2023-11-06 22:19:26,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:19:26,800 INFO L225 Difference]: With dead ends: 382 [2023-11-06 22:19:26,800 INFO L226 Difference]: Without dead ends: 380 [2023-11-06 22:19:26,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=420, Invalid=2133, Unknown=1, NotChecked=98, Total=2652 [2023-11-06 22:19:26,802 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 163 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:19:26,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 617 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 833 Invalid, 0 Unknown, 18 Unchecked, 11.4s Time] [2023-11-06 22:19:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-11-06 22:19:26,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 237. [2023-11-06 22:19:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 147 states have (on average 1.1700680272108843) internal successors, (172), 154 states have internal predecessors, (172), 73 states have call successors, (73), 16 states have call predecessors, (73), 16 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-06 22:19:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 317 transitions. [2023-11-06 22:19:26,994 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 317 transitions. Word has length 57 [2023-11-06 22:19:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:19:26,994 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 317 transitions. [2023-11-06 22:19:26,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-06 22:19:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 317 transitions. [2023-11-06 22:19:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-06 22:19:26,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:19:26,996 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:27,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:27,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:27,206 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:19:27,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash 513336511, now seen corresponding path program 2 times [2023-11-06 22:19:27,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:27,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921200594] [2023-11-06 22:19:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:27,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:27,215 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:19:27,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183637427] [2023-11-06 22:19:27,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:27,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:27,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:27,217 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:27,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:19:27,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:27,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:27,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:19:27,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-06 22:19:27,310 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:27,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:27,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921200594] [2023-11-06 22:19:27,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:19:27,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183637427] [2023-11-06 22:19:27,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183637427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:27,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:27,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:19:27,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581582539] [2023-11-06 22:19:27,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:27,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:19:27,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:27,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:19:27,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:19:27,313 INFO L87 Difference]: Start difference. First operand 237 states and 317 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-06 22:19:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:19:27,501 INFO L93 Difference]: Finished difference Result 410 states and 557 transitions. [2023-11-06 22:19:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:19:27,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2023-11-06 22:19:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:19:27,504 INFO L225 Difference]: With dead ends: 410 [2023-11-06 22:19:27,504 INFO L226 Difference]: Without dead ends: 254 [2023-11-06 22:19:27,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:19:27,506 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:19:27,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:19:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-11-06 22:19:27,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2023-11-06 22:19:27,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 158 states have (on average 1.1708860759493671) internal successors, (185), 160 states have internal predecessors, (185), 73 states have call successors, (73), 16 states have call predecessors, (73), 16 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-06 22:19:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 330 transitions. [2023-11-06 22:19:27,649 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 330 transitions. Word has length 62 [2023-11-06 22:19:27,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:19:27,649 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 330 transitions. [2023-11-06 22:19:27,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-06 22:19:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 330 transitions. [2023-11-06 22:19:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-06 22:19:27,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:19:27,651 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:27,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:27,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:27,857 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:19:27,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:27,858 INFO L85 PathProgramCache]: Analyzing trace with hash -420355271, now seen corresponding path program 3 times [2023-11-06 22:19:27,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:27,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965667210] [2023-11-06 22:19:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:27,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:27,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:19:27,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114485582] [2023-11-06 22:19:27,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:19:27,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:27,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:27,876 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:27,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:19:27,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:19:27,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:27,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-06 22:19:27,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-06 22:19:28,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-06 22:19:30,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:30,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965667210] [2023-11-06 22:19:30,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:19:30,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114485582] [2023-11-06 22:19:30,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114485582] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:30,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:19:30,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2023-11-06 22:19:30,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562997556] [2023-11-06 22:19:30,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:30,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:19:30,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:19:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:19:30,976 INFO L87 Difference]: Start difference. First operand 248 states and 330 transitions. Second operand has 28 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-06 22:19:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:19:38,570 INFO L93 Difference]: Finished difference Result 363 states and 489 transitions. [2023-11-06 22:19:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 22:19:38,571 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 62 [2023-11-06 22:19:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:19:38,574 INFO L225 Difference]: With dead ends: 363 [2023-11-06 22:19:38,574 INFO L226 Difference]: Without dead ends: 361 [2023-11-06 22:19:38,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=661, Invalid=2999, Unknown=0, NotChecked=0, Total=3660 [2023-11-06 22:19:38,577 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 263 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:19:38,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 481 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-06 22:19:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-11-06 22:19:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 343. [2023-11-06 22:19:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 214 states have (on average 1.1775700934579438) internal successors, (252), 217 states have internal predecessors, (252), 107 states have call successors, (107), 21 states have call predecessors, (107), 21 states have return successors, (106), 104 states have call predecessors, (106), 106 states have call successors, (106) [2023-11-06 22:19:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 465 transitions. [2023-11-06 22:19:38,825 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 465 transitions. Word has length 62 [2023-11-06 22:19:38,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:19:38,825 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 465 transitions. [2023-11-06 22:19:38,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-06 22:19:38,826 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 465 transitions. [2023-11-06 22:19:38,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-06 22:19:38,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:19:38,826 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:38,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:39,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:19:39,027 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:19:39,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:39,027 INFO L85 PathProgramCache]: Analyzing trace with hash -819166674, now seen corresponding path program 1 times [2023-11-06 22:19:39,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:39,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520363163] [2023-11-06 22:19:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:39,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:39,036 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:19:39,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604931219] [2023-11-06 22:19:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:39,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:39,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:39,038 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:39,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:19:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:39,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-06 22:19:39,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-06 22:19:40,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-06 22:19:49,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:49,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520363163] [2023-11-06 22:19:49,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:19:49,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604931219] [2023-11-06 22:19:49,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604931219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:49,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:19:49,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-11-06 22:19:49,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236829223] [2023-11-06 22:19:49,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:49,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:19:49,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:49,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:19:49,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:19:49,701 INFO L87 Difference]: Start difference. First operand 343 states and 465 transitions. Second operand has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-06 22:20:14,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:20:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:20:22,024 INFO L93 Difference]: Finished difference Result 537 states and 745 transitions. [2023-11-06 22:20:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-06 22:20:22,025 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 76 [2023-11-06 22:20:22,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:20:22,029 INFO L225 Difference]: With dead ends: 537 [2023-11-06 22:20:22,029 INFO L226 Difference]: Without dead ends: 533 [2023-11-06 22:20:22,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=1290, Invalid=5516, Unknown=0, NotChecked=0, Total=6806 [2023-11-06 22:20:22,033 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 271 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:20:22,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 880 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2023-11-06 22:20:22,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-11-06 22:20:22,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 508. [2023-11-06 22:20:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 319 states have (on average 1.1912225705329154) internal successors, (380), 323 states have internal predecessors, (380), 161 states have call successors, (161), 27 states have call predecessors, (161), 27 states have return successors, (160), 157 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-06 22:20:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 701 transitions. [2023-11-06 22:20:22,564 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 701 transitions. Word has length 76 [2023-11-06 22:20:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:20:22,565 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 701 transitions. [2023-11-06 22:20:22,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-06 22:20:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 701 transitions. [2023-11-06 22:20:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-06 22:20:22,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:20:22,567 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:22,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:22,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:22,776 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:20:22,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:22,777 INFO L85 PathProgramCache]: Analyzing trace with hash 685229769, now seen corresponding path program 1 times [2023-11-06 22:20:22,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:22,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765337711] [2023-11-06 22:20:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:22,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:22,786 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:20:22,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464144381] [2023-11-06 22:20:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:22,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:22,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:22,787 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:22,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:20:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:22,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:20:22,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-11-06 22:20:23,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-06 22:20:24,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:24,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765337711] [2023-11-06 22:20:24,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:20:24,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464144381] [2023-11-06 22:20:24,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464144381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:24,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:20:24,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-11-06 22:20:24,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713670579] [2023-11-06 22:20:24,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:24,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:20:24,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:20:24,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:20:24,039 INFO L87 Difference]: Start difference. First operand 508 states and 701 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-11-06 22:20:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:20:28,275 INFO L93 Difference]: Finished difference Result 1001 states and 1515 transitions. [2023-11-06 22:20:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:20:28,276 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 79 [2023-11-06 22:20:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:20:28,284 INFO L225 Difference]: With dead ends: 1001 [2023-11-06 22:20:28,285 INFO L226 Difference]: Without dead ends: 999 [2023-11-06 22:20:28,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=369, Invalid=1353, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 22:20:28,287 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 119 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:20:28,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 373 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 22:20:28,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2023-11-06 22:20:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 939. [2023-11-06 22:20:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 493 states have (on average 1.2738336713995944) internal successors, (628), 497 states have internal predecessors, (628), 413 states have call successors, (413), 32 states have call predecessors, (413), 32 states have return successors, (412), 409 states have call predecessors, (412), 412 states have call successors, (412) [2023-11-06 22:20:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1453 transitions. [2023-11-06 22:20:29,607 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1453 transitions. Word has length 79 [2023-11-06 22:20:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:20:29,608 INFO L495 AbstractCegarLoop]: Abstraction has 939 states and 1453 transitions. [2023-11-06 22:20:29,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-11-06 22:20:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1453 transitions. [2023-11-06 22:20:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-06 22:20:29,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:20:29,610 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:29,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-06 22:20:29,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:20:29,816 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:20:29,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:29,817 INFO L85 PathProgramCache]: Analyzing trace with hash -248462013, now seen corresponding path program 1 times [2023-11-06 22:20:29,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:29,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930454286] [2023-11-06 22:20:29,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:29,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:29,828 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:20:29,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278474060] [2023-11-06 22:20:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:29,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:29,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:29,830 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:29,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:20:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:29,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:20:29,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-06 22:20:30,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-06 22:20:34,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:34,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930454286] [2023-11-06 22:20:34,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:20:34,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278474060] [2023-11-06 22:20:34,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278474060] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:34,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:20:34,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-11-06 22:20:34,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687924197] [2023-11-06 22:20:34,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:34,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:20:34,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:34,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:20:34,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:20:34,127 INFO L87 Difference]: Start difference. First operand 939 states and 1453 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 22 states have internal predecessors, (52), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-06 22:20:49,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:21:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:11,960 INFO L93 Difference]: Finished difference Result 1331 states and 2085 transitions. [2023-11-06 22:21:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 22:21:11,961 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 22 states have internal predecessors, (52), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 79 [2023-11-06 22:21:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:11,971 INFO L225 Difference]: With dead ends: 1331 [2023-11-06 22:21:11,971 INFO L226 Difference]: Without dead ends: 1329 [2023-11-06 22:21:11,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=848, Invalid=3442, Unknown=0, NotChecked=0, Total=4290 [2023-11-06 22:21:11,974 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 193 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:11,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 519 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2023-11-06 22:21:11,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2023-11-06 22:21:14,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1197. [2023-11-06 22:21:14,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 619 states have (on average 1.2875605815831987) internal successors, (797), 623 states have internal predecessors, (797), 541 states have call successors, (541), 36 states have call predecessors, (541), 36 states have return successors, (540), 537 states have call predecessors, (540), 540 states have call successors, (540) [2023-11-06 22:21:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1878 transitions. [2023-11-06 22:21:14,247 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1878 transitions. Word has length 79 [2023-11-06 22:21:14,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:14,248 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 1878 transitions. [2023-11-06 22:21:14,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 22 states have internal predecessors, (52), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-06 22:21:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1878 transitions. [2023-11-06 22:21:14,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-06 22:21:14,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:14,252 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:14,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:14,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:14,459 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:14,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:14,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1959088841, now seen corresponding path program 2 times [2023-11-06 22:21:14,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:14,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559995600] [2023-11-06 22:21:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:14,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:14,477 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:21:14,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387239774] [2023-11-06 22:21:14,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:21:14,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:14,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:14,493 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:14,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:21:14,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:21:14,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:14,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:21:14,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-06 22:21:14,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-06 22:21:14,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:14,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559995600] [2023-11-06 22:21:14,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:21:14,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387239774] [2023-11-06 22:21:14,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387239774] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:14,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:21:14,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-11-06 22:21:14,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451618223] [2023-11-06 22:21:14,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:14,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:21:14,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:21:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:21:14,886 INFO L87 Difference]: Start difference. First operand 1197 states and 1878 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-06 22:21:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:18,495 INFO L93 Difference]: Finished difference Result 1356 states and 2125 transitions. [2023-11-06 22:21:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:21:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 84 [2023-11-06 22:21:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:18,508 INFO L225 Difference]: With dead ends: 1356 [2023-11-06 22:21:18,509 INFO L226 Difference]: Without dead ends: 1349 [2023-11-06 22:21:18,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:21:18,511 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 67 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:18,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 382 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:21:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2023-11-06 22:21:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1161. [2023-11-06 22:21:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 593 states have (on average 1.2951096121416525) internal successors, (768), 596 states have internal predecessors, (768), 531 states have call successors, (531), 36 states have call predecessors, (531), 36 states have return successors, (530), 528 states have call predecessors, (530), 530 states have call successors, (530) [2023-11-06 22:21:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1829 transitions. [2023-11-06 22:21:20,767 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1829 transitions. Word has length 84 [2023-11-06 22:21:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:20,767 INFO L495 AbstractCegarLoop]: Abstraction has 1161 states and 1829 transitions. [2023-11-06 22:21:20,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-06 22:21:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1829 transitions. [2023-11-06 22:21:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-06 22:21:20,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:20,769 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:20,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:20,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-06 22:21:20,970 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:20,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:20,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1810606754, now seen corresponding path program 2 times [2023-11-06 22:21:20,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:20,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959167590] [2023-11-06 22:21:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:20,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:20,978 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:21:20,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073423035] [2023-11-06 22:21:20,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:21:20,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:20,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:20,984 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:20,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:21:21,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:21:21,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:21,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-06 22:21:21,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 29 proven. 58 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-11-06 22:21:22,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-06 22:21:31,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:31,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959167590] [2023-11-06 22:21:31,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:21:31,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073423035] [2023-11-06 22:21:31,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073423035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:31,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:21:31,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-11-06 22:21:31,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097879145] [2023-11-06 22:21:31,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:31,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:21:31,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:31,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:21:31,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:21:31,710 INFO L87 Difference]: Start difference. First operand 1161 states and 1829 transitions. Second operand has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2023-11-06 22:22:36,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:36,713 INFO L93 Difference]: Finished difference Result 1982 states and 3131 transitions. [2023-11-06 22:22:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-06 22:22:36,713 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) Word has length 96 [2023-11-06 22:22:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:36,724 INFO L225 Difference]: With dead ends: 1982 [2023-11-06 22:22:36,724 INFO L226 Difference]: Without dead ends: 1437 [2023-11-06 22:22:36,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=1486, Invalid=6704, Unknown=0, NotChecked=0, Total=8190 [2023-11-06 22:22:36,731 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 223 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:22:36,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 616 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2023-11-06 22:22:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2023-11-06 22:22:39,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1347. [2023-11-06 22:22:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 693 states have (on average 1.2857142857142858) internal successors, (891), 697 states have internal predecessors, (891), 613 states have call successors, (613), 40 states have call predecessors, (613), 40 states have return successors, (612), 609 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-06 22:22:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2116 transitions. [2023-11-06 22:22:39,492 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2116 transitions. Word has length 96 [2023-11-06 22:22:39,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:39,493 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2116 transitions. [2023-11-06 22:22:39,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2023-11-06 22:22:39,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2116 transitions. [2023-11-06 22:22:39,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-06 22:22:39,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:39,497 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:39,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:39,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:22:39,713 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:39,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:39,714 INFO L85 PathProgramCache]: Analyzing trace with hash 304105922, now seen corresponding path program 3 times [2023-11-06 22:22:39,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:39,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189488995] [2023-11-06 22:22:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:39,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:39,724 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:22:39,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621554484] [2023-11-06 22:22:39,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:22:39,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:39,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:39,726 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:39,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d697210f-4693-42cb-9967-d13a4140a000/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:22:40,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:22:40,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:40,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-06 22:22:40,406 INFO L285 TraceCheckSpWp]: Computing forward predicates...