./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.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_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/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_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/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_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/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 be4e75b70a907f4bb3fe11ead30460ebebe535afde280ea19731f48bb2dd2cd7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:31:29,614 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:31:29,687 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:31:29,694 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:31:29,694 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:31:29,720 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:31:29,721 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:31:29,721 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:31:29,722 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:31:29,723 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:31:29,724 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:31:29,724 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:31:29,725 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:31:29,725 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:31:29,726 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:31:29,726 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:31:29,727 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:31:29,727 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:31:29,728 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:31:29,729 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:31:29,729 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:31:29,730 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:31:29,730 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:31:29,731 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:31:29,731 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:31:29,731 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:31:29,732 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:31:29,732 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:31:29,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:31:29,733 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:31:29,734 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:31:29,734 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:31:29,735 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:31:29,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:31:29,736 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:31:29,736 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:31:29,737 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:31:29,737 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:31:29,737 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:31:29,738 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_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be4e75b70a907f4bb3fe11ead30460ebebe535afde280ea19731f48bb2dd2cd7 [2023-11-06 22:31:29,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:31:30,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:31:30,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:31:30,026 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:31:30,027 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:31:30,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2023-11-06 22:31:33,169 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:31:33,446 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:31:33,447 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2023-11-06 22:31:33,456 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/data/b7ff799b8/3c36ef7328d9481fac0376b85091d946/FLAGdc1f278bc [2023-11-06 22:31:33,486 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/data/b7ff799b8/3c36ef7328d9481fac0376b85091d946 [2023-11-06 22:31:33,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:31:33,493 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:31:33,495 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:31:33,495 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:31:33,506 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:31:33,510 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:33" (1/1) ... [2023-11-06 22:31:33,512 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e20bf17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33, skipping insertion in model container [2023-11-06 22:31:33,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:33" (1/1) ... [2023-11-06 22:31:33,542 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:31:33,719 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_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c[1176,1189] [2023-11-06 22:31:33,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:31:33,749 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:31:33,764 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_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c[1176,1189] [2023-11-06 22:31:33,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:31:33,787 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:31:33,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33 WrapperNode [2023-11-06 22:31:33,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:31:33,790 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:31:33,790 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:31:33,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:31:33,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33" (1/1) ... [2023-11-06 22:31:33,804 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33" (1/1) ... [2023-11-06 22:31:33,823 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2023-11-06 22:31:33,823 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:31:33,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:31:33,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:31:33,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:31:33,836 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33" (1/1) ... [2023-11-06 22:31:33,836 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33" (1/1) ... [2023-11-06 22:31:33,838 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33" (1/1) ... [2023-11-06 22:31:33,838 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33" (1/1) ... [2023-11-06 22:31:33,842 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33" (1/1) ... [2023-11-06 22:31:33,846 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33" (1/1) ... [2023-11-06 22:31:33,848 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33" (1/1) ... [2023-11-06 22:31:33,849 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33" (1/1) ... [2023-11-06 22:31:33,851 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:31:33,852 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:31:33,852 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:31:33,852 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:31:33,853 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33" (1/1) ... [2023-11-06 22:31:33,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:31:33,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:33,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:31:33,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:31:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:31:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:31:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:31:33,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:31:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:31:33,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:31:34,015 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:31:34,017 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:31:34,196 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:31:34,202 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:31:34,202 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:31:34,204 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:34 BoogieIcfgContainer [2023-11-06 22:31:34,204 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:31:34,211 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:31:34,211 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:31:34,215 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:31:34,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:31:33" (1/3) ... [2023-11-06 22:31:34,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c454a1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:34, skipping insertion in model container [2023-11-06 22:31:34,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:33" (2/3) ... [2023-11-06 22:31:34,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c454a1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:34, skipping insertion in model container [2023-11-06 22:31:34,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:34" (3/3) ... [2023-11-06 22:31:34,219 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound20.c [2023-11-06 22:31:34,241 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:31:34,242 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:31:34,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:31:34,306 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;@7f0edc52, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:31:34,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:31:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:31:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 22:31:34,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:34,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:34,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:34,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:34,326 INFO L85 PathProgramCache]: Analyzing trace with hash -572597424, now seen corresponding path program 1 times [2023-11-06 22:31:34,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:34,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277192185] [2023-11-06 22:31:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:34,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:34,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:34,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277192185] [2023-11-06 22:31:34,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:31:34,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906489124] [2023-11-06 22:31:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:34,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:34,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:34,480 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:34,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:31:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:34,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:31:34,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:34,621 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:31:34,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906489124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:34,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:34,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:31:34,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371874452] [2023-11-06 22:31:34,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:34,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:31:34,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:34,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:31:34,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:31:34,689 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:34,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:34,719 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2023-11-06 22:31:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:31:34,721 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 22:31:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:34,728 INFO L225 Difference]: With dead ends: 39 [2023-11-06 22:31:34,728 INFO L226 Difference]: Without dead ends: 17 [2023-11-06 22:31:34,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 22:31:34,735 INFO L413 NwaCegarLoop]: 24 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, 24 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 22:31:34,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:31:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-06 22:31:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-06 22:31:34,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:31:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-06 22:31:34,781 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2023-11-06 22:31:34,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:34,782 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-06 22:31:34,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:34,782 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-06 22:31:34,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 22:31:34,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:34,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:34,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:34,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:31:34,989 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:34,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:34,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1986366499, now seen corresponding path program 1 times [2023-11-06 22:31:34,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:34,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885822689] [2023-11-06 22:31:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:35,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:35,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:35,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885822689] [2023-11-06 22:31:35,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:31:35,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772885695] [2023-11-06 22:31:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:35,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:35,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:35,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:35,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:31:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:35,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:31:35,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:35,211 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:31:35,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772885695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:35,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:35,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:31:35,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202464467] [2023-11-06 22:31:35,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:35,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:31:35,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:31:35,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:31:35,215 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:35,237 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-06 22:31:35,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:31:35,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 22:31:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:35,239 INFO L225 Difference]: With dead ends: 26 [2023-11-06 22:31:35,239 INFO L226 Difference]: Without dead ends: 19 [2023-11-06 22:31:35,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:31:35,242 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:35,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:31:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-06 22:31:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-06 22:31:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:31:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-06 22:31:35,249 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2023-11-06 22:31:35,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:35,250 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-06 22:31:35,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-06 22:31:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 22:31:35,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:35,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:35,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:35,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:35,458 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:35,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:35,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1984579039, now seen corresponding path program 1 times [2023-11-06 22:31:35,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:35,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403129490] [2023-11-06 22:31:35,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:35,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:35,483 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:35,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754544225] [2023-11-06 22:31:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:35,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:35,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:35,491 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:35,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:31:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:35,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:31:35,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:35,740 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:31:35,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:35,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403129490] [2023-11-06 22:31:35,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:35,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754544225] [2023-11-06 22:31:35,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754544225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:35,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:35,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:31:35,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313109081] [2023-11-06 22:31:35,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:35,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:31:35,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:35,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:31:35,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:31:35,747 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:35,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:35,896 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2023-11-06 22:31:35,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:31:35,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 22:31:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:35,898 INFO L225 Difference]: With dead ends: 34 [2023-11-06 22:31:35,899 INFO L226 Difference]: Without dead ends: 27 [2023-11-06 22:31:35,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:31:35,901 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:35,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 54 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:31:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-06 22:31:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-11-06 22:31:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:31:35,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-11-06 22:31:35,910 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2023-11-06 22:31:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:35,911 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-11-06 22:31:35,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:35,911 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-11-06 22:31:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:31:35,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:35,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:35,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:36,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:36,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:36,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash 905454657, now seen corresponding path program 1 times [2023-11-06 22:31:36,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:36,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046385579] [2023-11-06 22:31:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:36,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:36,142 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:36,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518427194] [2023-11-06 22:31:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:36,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:36,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:36,155 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:36,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:31:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:36,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:31:36,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:36,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:36,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:36,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046385579] [2023-11-06 22:31:36,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:36,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518427194] [2023-11-06 22:31:36,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518427194] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:36,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:36,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-06 22:31:36,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722478792] [2023-11-06 22:31:36,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:36,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:31:36,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:31:36,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:31:36,385 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:31:36,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:36,483 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2023-11-06 22:31:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:31:36,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-06 22:31:36,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:36,490 INFO L225 Difference]: With dead ends: 62 [2023-11-06 22:31:36,490 INFO L226 Difference]: Without dead ends: 55 [2023-11-06 22:31:36,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:31:36,501 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:36,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 96 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:31:36,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-06 22:31:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-11-06 22:31:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:31:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-11-06 22:31:36,529 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 20 [2023-11-06 22:31:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:36,529 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-11-06 22:31:36,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:31:36,530 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-11-06 22:31:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:31:36,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:36,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:36,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:36,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:36,731 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:36,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash 907242117, now seen corresponding path program 1 times [2023-11-06 22:31:36,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:36,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991274052] [2023-11-06 22:31:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:36,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:36,747 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:36,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283306101] [2023-11-06 22:31:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:36,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:36,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:36,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:36,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:31:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:36,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:31:36,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:37,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:44,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:44,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991274052] [2023-11-06 22:31:44,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:44,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283306101] [2023-11-06 22:31:44,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283306101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:44,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:44,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2023-11-06 22:31:44,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464020960] [2023-11-06 22:31:44,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:44,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:31:44,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:44,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:31:44,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:31:44,730 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:31:47,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:31:49,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:31:50,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:50,568 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2023-11-06 22:31:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:31:50,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-06 22:31:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:50,572 INFO L225 Difference]: With dead ends: 86 [2023-11-06 22:31:50,572 INFO L226 Difference]: Without dead ends: 84 [2023-11-06 22:31:50,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:31:50,574 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:50,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 101 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 131 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2023-11-06 22:31:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-06 22:31:50,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2023-11-06 22:31:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:31:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2023-11-06 22:31:50,597 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 20 [2023-11-06 22:31:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:50,598 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2023-11-06 22:31:50,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:31:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2023-11-06 22:31:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:31:50,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:50,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:50,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:50,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:50,800 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:50,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash 97895491, now seen corresponding path program 1 times [2023-11-06 22:31:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:50,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120103921] [2023-11-06 22:31:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:50,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:50,830 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:50,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662531713] [2023-11-06 22:31:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:50,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:50,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:50,841 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:50,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:31:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:50,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:31:50,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:51,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:52,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:52,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120103921] [2023-11-06 22:31:52,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:52,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662531713] [2023-11-06 22:31:52,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662531713] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:52,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:52,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-11-06 22:31:52,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832845440] [2023-11-06 22:31:52,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:52,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:31:52,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:52,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:31:52,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:31:52,468 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:31:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:53,703 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2023-11-06 22:31:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:31:53,704 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-06 22:31:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:53,705 INFO L225 Difference]: With dead ends: 111 [2023-11-06 22:31:53,706 INFO L226 Difference]: Without dead ends: 102 [2023-11-06 22:31:53,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:31:53,708 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:53,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 110 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:31:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-06 22:31:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2023-11-06 22:31:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 76 states have internal predecessors, (86), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 22:31:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2023-11-06 22:31:53,729 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 20 [2023-11-06 22:31:53,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:53,729 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2023-11-06 22:31:53,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:31:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2023-11-06 22:31:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 22:31:53,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:53,731 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:53,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:53,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:31:53,938 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:53,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:53,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1470880860, now seen corresponding path program 1 times [2023-11-06 22:31:53,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:53,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876445523] [2023-11-06 22:31:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:53,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:53,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:53,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623766383] [2023-11-06 22:31:53,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:53,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:53,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:53,972 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:53,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:31:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:54,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:31:54,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:31:54,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:31:54,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:54,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876445523] [2023-11-06 22:31:54,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:31:54,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623766383] [2023-11-06 22:31:54,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623766383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:54,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:54,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-11-06 22:31:54,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501422034] [2023-11-06 22:31:54,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:54,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:31:54,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:54,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:31:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:31:54,222 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:31:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:54,383 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2023-11-06 22:31:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:31:54,384 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-11-06 22:31:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:54,385 INFO L225 Difference]: With dead ends: 104 [2023-11-06 22:31:54,385 INFO L226 Difference]: Without dead ends: 89 [2023-11-06 22:31:54,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:31:54,387 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:54,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:31:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-06 22:31:54,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2023-11-06 22:31:54,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 73 states have internal predecessors, (80), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 22:31:54,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2023-11-06 22:31:54,416 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 26 [2023-11-06 22:31:54,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:54,417 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2023-11-06 22:31:54,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:31:54,419 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2023-11-06 22:31:54,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 22:31:54,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:54,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:54,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:54,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:54,628 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:54,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:54,629 INFO L85 PathProgramCache]: Analyzing trace with hash 103630759, now seen corresponding path program 1 times [2023-11-06 22:31:54,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:54,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426604540] [2023-11-06 22:31:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:54,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:54,658 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:31:54,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928103262] [2023-11-06 22:31:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:54,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:54,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:54,664 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:54,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:31:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:54,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:31:54,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:57,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:27,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:27,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426604540] [2023-11-06 22:32:27,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:32:27,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928103262] [2023-11-06 22:32:27,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928103262] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:27,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:32:27,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2023-11-06 22:32:27,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405444793] [2023-11-06 22:32:27,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:27,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:32:27,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:27,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:32:27,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=278, Unknown=7, NotChecked=0, Total=342 [2023-11-06 22:32:27,911 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:32:29,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:32:36,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:32:38,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:32:47,940 WARN L293 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 51 DAG size of output: 19 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:33:01,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:33:03,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:33:20,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:33:34,085 WARN L293 SmtUtils]: Spent 9.92s on a formula simplification. DAG size of input: 43 DAG size of output: 33 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:33:36,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:33:45,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:33:47,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:34:00,143 WARN L293 SmtUtils]: Spent 10.09s on a formula simplification. DAG size of input: 55 DAG size of output: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:34:01,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:34:06,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:34:10,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:34:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:10,581 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2023-11-06 22:34:10,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:34:10,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2023-11-06 22:34:10,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:10,584 INFO L225 Difference]: With dead ends: 124 [2023-11-06 22:34:10,584 INFO L226 Difference]: Without dead ends: 122 [2023-11-06 22:34:10,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 106.5s TimeCoverageRelationStatistics Valid=170, Invalid=805, Unknown=17, NotChecked=0, Total=992 [2023-11-06 22:34:10,586 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 17 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:10,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 194 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 288 Invalid, 6 Unknown, 0 Unchecked, 23.5s Time] [2023-11-06 22:34:10,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-06 22:34:10,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2023-11-06 22:34:10,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 93 states have internal predecessors, (101), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-06 22:34:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2023-11-06 22:34:10,614 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 30 [2023-11-06 22:34:10,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:10,615 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2023-11-06 22:34:10,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:34:10,615 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2023-11-06 22:34:10,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-06 22:34:10,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:10,619 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:34:10,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 22:34:10,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:10,826 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:10,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:10,827 INFO L85 PathProgramCache]: Analyzing trace with hash -957536403, now seen corresponding path program 2 times [2023-11-06 22:34:10,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:10,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065444794] [2023-11-06 22:34:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:10,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:10,859 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:10,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172538322] [2023-11-06 22:34:10,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:34:10,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:10,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:10,866 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:10,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:34:10,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:34:10,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:34:10,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:34:10,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:34:11,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 22:34:11,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:11,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065444794] [2023-11-06 22:34:11,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:11,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172538322] [2023-11-06 22:34:11,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172538322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:11,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:34:11,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 22:34:11,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763007513] [2023-11-06 22:34:11,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:11,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:34:11,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:11,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:34:11,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:34:11,233 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 22:34:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:11,482 INFO L93 Difference]: Finished difference Result 292 states and 333 transitions. [2023-11-06 22:34:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:34:11,483 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 50 [2023-11-06 22:34:11,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:11,487 INFO L225 Difference]: With dead ends: 292 [2023-11-06 22:34:11,487 INFO L226 Difference]: Without dead ends: 285 [2023-11-06 22:34:11,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:34:11,489 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:11,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 132 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:34:11,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-06 22:34:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 275. [2023-11-06 22:34:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 218 states have (on average 1.1330275229357798) internal successors, (247), 227 states have internal predecessors, (247), 29 states have call successors, (29), 27 states have call predecessors, (29), 27 states have return successors, (28), 20 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-06 22:34:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 304 transitions. [2023-11-06 22:34:11,554 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 304 transitions. Word has length 50 [2023-11-06 22:34:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:11,554 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 304 transitions. [2023-11-06 22:34:11,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 22:34:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 304 transitions. [2023-11-06 22:34:11,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-06 22:34:11,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:11,558 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:34:11,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 22:34:11,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:11,765 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:11,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:11,766 INFO L85 PathProgramCache]: Analyzing trace with hash 535727021, now seen corresponding path program 2 times [2023-11-06 22:34:11,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:11,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789038826] [2023-11-06 22:34:11,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:11,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:11,790 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:11,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629492166] [2023-11-06 22:34:11,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:34:11,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:11,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:11,792 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:11,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:34:11,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:34:11,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:34:11,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 22:34:11,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:34:21,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-06 22:34:37,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:37,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789038826] [2023-11-06 22:34:37,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:37,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629492166] [2023-11-06 22:34:37,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629492166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:37,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:34:37,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 28 [2023-11-06 22:34:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171623769] [2023-11-06 22:34:37,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:37,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:34:37,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:37,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:34:37,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=623, Unknown=4, NotChecked=0, Total=756 [2023-11-06 22:34:37,543 INFO L87 Difference]: Start difference. First operand 275 states and 304 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:34:59,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:35:01,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:35:03,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:35:04,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:35:24,974 WARN L293 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 56 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:35:25,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:25,907 INFO L93 Difference]: Finished difference Result 374 states and 424 transitions. [2023-11-06 22:35:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:35:25,908 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-11-06 22:35:25,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:25,912 INFO L225 Difference]: With dead ends: 374 [2023-11-06 22:35:25,913 INFO L226 Difference]: Without dead ends: 372 [2023-11-06 22:35:25,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=432, Invalid=2009, Unknown=9, NotChecked=0, Total=2450 [2023-11-06 22:35:25,916 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:25,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 298 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 446 Invalid, 2 Unknown, 0 Unchecked, 12.1s Time] [2023-11-06 22:35:25,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-06 22:35:25,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 368. [2023-11-06 22:35:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 294 states have (on average 1.1360544217687074) internal successors, (334), 303 states have internal predecessors, (334), 40 states have call successors, (40), 33 states have call predecessors, (40), 33 states have return successors, (39), 31 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-06 22:35:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 413 transitions. [2023-11-06 22:35:26,003 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 413 transitions. Word has length 50 [2023-11-06 22:35:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:35:26,004 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 413 transitions. [2023-11-06 22:35:26,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:35:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 413 transitions. [2023-11-06 22:35:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-06 22:35:26,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:26,008 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:35:26,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:35:26,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:26,215 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:26,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:26,216 INFO L85 PathProgramCache]: Analyzing trace with hash -861644147, now seen corresponding path program 3 times [2023-11-06 22:35:26,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:26,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689217632] [2023-11-06 22:35:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:26,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:26,226 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:35:26,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848043949] [2023-11-06 22:35:26,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:35:26,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:26,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:26,228 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:35:26,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:35:26,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-06 22:35:26,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:35:26,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:35:26,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:35:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 87 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-06 22:35:29,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:35:30,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:35:30,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689217632] [2023-11-06 22:35:30,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:35:30,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848043949] [2023-11-06 22:35:30,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848043949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:35:30,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:35:30,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-06 22:35:30,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834711034] [2023-11-06 22:35:30,162 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:35:30,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:35:30,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:35:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:35:30,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:35:30,164 INFO L87 Difference]: Start difference. First operand 368 states and 413 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 22:35:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:31,839 INFO L93 Difference]: Finished difference Result 399 states and 446 transitions. [2023-11-06 22:35:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:35:31,839 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 60 [2023-11-06 22:35:31,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:31,842 INFO L225 Difference]: With dead ends: 399 [2023-11-06 22:35:31,843 INFO L226 Difference]: Without dead ends: 395 [2023-11-06 22:35:31,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:35:31,844 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:31,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 101 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:35:31,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-11-06 22:35:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 111. [2023-11-06 22:35:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 89 states have internal predecessors, (100), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 22:35:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2023-11-06 22:35:31,894 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 60 [2023-11-06 22:35:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:35:31,895 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2023-11-06 22:35:31,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 22:35:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2023-11-06 22:35:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-06 22:35:31,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:31,897 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:35:31,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 22:35:32,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:32,103 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:32,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:32,103 INFO L85 PathProgramCache]: Analyzing trace with hash -401903931, now seen corresponding path program 3 times [2023-11-06 22:35:32,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:32,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386234158] [2023-11-06 22:35:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:32,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:32,115 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:35:32,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576944796] [2023-11-06 22:35:32,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:35:32,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:32,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:32,117 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:35:32,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:35:32,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-06 22:35:32,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:35:32,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:35:32,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:35:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:35:32,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:35:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 290 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-06 22:35:32,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:35:32,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386234158] [2023-11-06 22:35:32,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:35:32,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576944796] [2023-11-06 22:35:32,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576944796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:35:32,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:35:32,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2023-11-06 22:35:32,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756695395] [2023-11-06 22:35:32,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:35:32,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:35:32,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:35:32,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:35:32,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:35:32,885 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-11-06 22:35:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:33,377 INFO L93 Difference]: Finished difference Result 216 states and 245 transitions. [2023-11-06 22:35:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 22:35:33,378 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 110 [2023-11-06 22:35:33,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:33,380 INFO L225 Difference]: With dead ends: 216 [2023-11-06 22:35:33,380 INFO L226 Difference]: Without dead ends: 211 [2023-11-06 22:35:33,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 22:35:33,382 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 119 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:33,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 205 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:35:33,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-06 22:35:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2023-11-06 22:35:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 169 states have (on average 1.1242603550295858) internal successors, (190), 169 states have internal predecessors, (190), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-06 22:35:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 231 transitions. [2023-11-06 22:35:33,448 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 231 transitions. Word has length 110 [2023-11-06 22:35:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:35:33,448 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 231 transitions. [2023-11-06 22:35:33,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-11-06 22:35:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 231 transitions. [2023-11-06 22:35:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-11-06 22:35:33,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:33,452 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:35:33,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:35:33,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:35:33,652 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:33,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:33,653 INFO L85 PathProgramCache]: Analyzing trace with hash 141809069, now seen corresponding path program 4 times [2023-11-06 22:35:33,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:33,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216844994] [2023-11-06 22:35:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:33,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:33,670 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:35:33,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939765472] [2023-11-06 22:35:33,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:35:33,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:33,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:33,673 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:35:33,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0466cbc6-9b84-4a6b-a01e-7c44dc0d9e86/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process